CVE-2023-39355: FreeRDP Use-After-Free in RDPGFX_CMDID_RESETGRAPHICS
First published: Thu Aug 31 2023(Updated: )
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.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| =3.0.0-beta1 | ||
| =3.0.0-beta2 | ||
| =10.0 | ||
| FreeRDP FreeRDP | =3.0.0-beta1 | |
| FreeRDP FreeRDP | =3.0.0-beta2 | |
| Debian Debian Linux | =10.0 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-39355?
CVE-2023-39355 is a vulnerability in FreeRDP, a free implementation of the Remote Desktop Protocol (RDP), that allows for a Use-After-Free in processing RDPGFX_CMDID_RESETGRAPHICS packets.
How severe is CVE-2023-39355?
CVE-2023-39355 is considered critical with a severity score of 9.8 out of 10.
What software versions are affected by CVE-2023-39355?
Versions of FreeRDP on the 3.x release branch before beta3, such as 3.0.0-beta1 and 3.0.0-beta2, are affected by CVE-2023-39355.
How can I fix CVE-2023-39355?
To fix CVE-2023-39355, update FreeRDP to version 3.0.0-beta3 or later.
Where can I find more information about CVE-2023-39355?
You can find more information about CVE-2023-39355 in the references provided: [GitHub commit](https://github.com/FreeRDP/FreeRDP/commit/d6f9d33a7db0b346195b6a15b5b99944ba41beee), [GitHub advisory](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hvwj-vmg6-2f5h), [Debian LTS announcement](https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html).
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