CVE-2023-39355

Public Exploit
FreeRDP Use-After-Free in RDPGFX_CMDID_RESETGRAPHICS

Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Versions of FreeRDP on the 3.x release branch before beta3 are subject to a Use-After-Free in processing `RDPGFX_CMDID_RESETGRAPHICS` packets. If `context->maxPlaneSize` is 0, `context->planesBuffer` will be freed. However, without updating `context->planesBuffer`, this leads to a Use-After-Free exploit vector. In most environments this should only result in a crash. This issue has been addressed in version 3.0.0-beta3 and users of the beta 3.x releases are advised to upgrade. There are no known workarounds for this vulnerability.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.25%
Vendor Advisory github.com
Affected: FreeRDP FreeRDP
Published at:
Updated at:

References

Link Tags
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hvwj-vmg6-2f5h vendor advisory exploit
https://github.com/FreeRDP/FreeRDP/commit/d6f9d33a7db0b346195b6a15b5b99944ba41beee patch
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html third party advisory mailing list
https://security.gentoo.org/glsa/202401-16

Frequently Asked Questions

What is the severity of CVE-2023-39355?
CVE-2023-39355 has been scored as a high severity vulnerability.
How to fix CVE-2023-39355?
To fix CVE-2023-39355, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-39355 being actively exploited in the wild?
It is possible that CVE-2023-39355 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-39355?
CVE-2023-39355 affects FreeRDP FreeRDP.
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