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freerdp: patch CVE-2023-40181

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Details: https://nvd.nist.gov/vuln/detail/CVE-2023-40181

Pick the patch that was identified[1] by Debian as the solution.

[1]: https://security-tracker.debian.org/tracker/CVE-2023-40181

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
This commit is contained in:
Gyorgy Sarvari
2026-01-21 08:04:38 +01:00
parent c9affa4bd5
commit d4e1c145e6
2 changed files with 34 additions and 0 deletions
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meta-oe/recipes-support/freerdp/freerdp/CVE-2023-40181.patch
+33
View File
@@ -0,0 +1,33 @@
From de011238a720cf80a7f96ee0d7a43d85fbc0552f Mon Sep 17 00:00:00 2001
From: Armin Novak <armin.novak@thincast.com>
Date: Mon, 21 Aug 2023 14:30:11 +0200
Subject: [PATCH] fix cBitsRemaining calculation
fixed out of bound read reported by @pwn2carr
(cherry picked from commit c39c82277a73332e9c1b64db98a34559f424fe20)
CVE: CVE-2023-40181
Upstream-Status: Backport [https://github.com/FreeRDP/FreeRDP/commit/c23cbdc4a5756bd723223c7139654de7439fdcc0]
Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
---
libfreerdp/codec/zgfx.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/libfreerdp/codec/zgfx.c b/libfreerdp/codec/zgfx.c
index 04ddeadb2..4489b3798 100644
--- a/libfreerdp/codec/zgfx.c
+++ b/libfreerdp/codec/zgfx.c
@@ -259,7 +259,11 @@ static BOOL zgfx_decompress_segment(ZGFX_CONTEXT* zgfx, wStream* stream, size_t
zgfx->pbInputCurrent = pbSegment;
zgfx->pbInputEnd = &pbSegment[cbSegment - 1];
/* NumberOfBitsToDecode = ((NumberOfBytesToDecode - 1) * 8) - ValueOfLastByte */
- zgfx->cBitsRemaining = 8 * (cbSegment - 1) - *zgfx->pbInputEnd;
+ const UINT32 bits = 8u * (cbSegment - 1u);
+ if (bits < *zgfx->pbInputEnd)
+ return FALSE;
+
+ zgfx->cBitsRemaining = bits - *zgfx->pbInputEnd;
zgfx->cBitsCurrent = 0;
zgfx->BitsCurrent = 0;
meta-oe/recipes-support/freerdp/freerdp_2.6.1.bb
+1
View File
@@ -25,6 +25,7 @@ SRC_URI = "git://github.com/FreeRDP/FreeRDP.git;branch=stable-2.0;protocol=https
file://CVE-2023-39351.patch \
file://CVE-2023-39352.patch \
file://CVE-2023-39353.patch \
file://CVE-2023-40181.patch \
"
S = "${WORKDIR}/git"