freerdp: patch CVE-2023-40181

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>

meta-oe/recipes-support/freerdp/freerdp/CVE-2023-40181.patch

@@ -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

@@ -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"