Bug 1214865 (CVE-2023-40187)

Summary:	VUL-0: CVE-2023-40187: freerdp: Use-After-Free in avc420_ensure_buffer, avc444_ensure_buffer
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Alexander Bergmann <abergmann>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED INVALID	QA Contact:	Security Team bot <security-team>
Severity:	Major
Priority:	P3 - Medium	CC:	cathy.hu, security-team, stoyan.manolov, yu.daike
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/376913/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-40187:7.3:(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Alexander Bergmann 2023-09-01 06:17:34 UTC

CVE-2023-40187

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released
under the Apache license. Affected versions of the 3.x beta branch are subject
to a Use-After-Free issue in the `avc420_ensure_buffer` and
`avc444_ensure_buffer` functions. If the value of `piDstSize[x]` is 0,
`ppYUVDstData[x]` will be freed. However, in this case `ppYUVDstData[x]` will
not have been updated which leads to a Use-After-Free vulnerability. This issue
has been addressed in version 3.0.0-beta3. Users of the 3.x beta releases are
advised to upgrade. There are no known workarounds for this vulnerability.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-40187
https://www.cve.org/CVERecord?id=CVE-2023-40187
https://github.com/FreeRDP/FreeRDP/blob/5be5553e0da72178a4b94cc1ffbdace9ceb153e5/libfreerdp/codec/h264.c#L413-L427
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-pwf9-v5p9-ch4f