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freerdp2
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CVE-2022-39316、CVE-2022-39317 安全更新：FreeRDP 缓冲区错误漏洞.

This commit is contained in:
yanggao 2023-02-24 12:29:52 +08:00
parent ed477a9d70
commit 5f8d0e7008
2 changed files with 13 additions and 4 deletions
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6
debian/changelog vendored
View File

@ -1,3 +1,9 @@
freerdp2 (2.8.1-ok2) yangtze; urgency=medium
* kimjuncotton_y CVE-2022-39316、CVE-2022-39317 安全更新：FreeRDP 缓冲区错误漏洞.
-- yanggao <yang_gao@bupt.edu.cn> Fri, 24 Feb 2023 12:28:51 +0800
freerdp2 (2.8.1-ok1) yangtze; urgency=medium
* Build for openKylin.

11
libfreerdp/codec/zgfx.c
View File

@ -230,19 +230,19 @@ static BOOL zgfx_decompress_segment(ZGFX_CONTEXT* zgfx, wStream* stream, size_t
BYTE* pbSegment;
size_t cbSegment;
if (!zgfx || !stream)
if (!zgfx || !stream || (segmentSize < 2))
return FALSE;
cbSegment = segmentSize - 1;
if ((Stream_GetRemainingLength(stream) < segmentSize) || (segmentSize < 1) ||
(segmentSize > UINT32_MAX))
if ((Stream_GetRemainingLength(stream) < segmentSize) || (segmentSize > UINT32_MAX))
return FALSE;
Stream_Read_UINT8(stream, flags); /* header (1 byte) */
zgfx->OutputCount = 0;
pbSegment = Stream_Pointer(stream);
Stream_Seek(stream, cbSegment);
if (!Stream_SafeSeek(stream, cbSegment))
return FALSE;
if (!(flags & PACKET_COMPRESSED))
{
@ -346,6 +346,9 @@ static BOOL zgfx_decompress_segment(ZGFX_CONTEXT* zgfx, wStream* stream, size_t
if (count > sizeof(zgfx->OutputBuffer) - zgfx->OutputCount)
return FALSE;
if (count > zgfx->cBitsRemaining / 8)
return FALSE;
CopyMemory(&(zgfx->OutputBuffer[zgfx->OutputCount]), zgfx->pbInputCurrent,
count);
zgfx_history_buffer_ring_write(zgfx, zgfx->pbInputCurrent, count);