| Name | CVE-2023-39356 |
| Description | FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a missing offset validation may lead to an Out Of Bound Read in the function `gdi_multi_opaque_rect`. In particular there is no code to validate if the value `multi_opaque_rect->numRectangles` is less than 45. Looping through `multi_opaque_rect->`numRectangles without proper boundary checks can lead to Out-of-Bounds Read errors which will likely lead to a crash. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this vulnerability. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3606-1, DLA-4053-1 |
| Debian Bugs | 1051638 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| freerdp2 (PTS) | bullseye | 2.3.0+dfsg1-2+deb11u1 | vulnerable |
| bullseye (security) | 2.3.0+dfsg1-2+deb11u3 | fixed |
| bookworm | 2.10.0+dfsg1-1 | vulnerable |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - freerdp2 <no-dsa> (Minor issue)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q5v5-qhj5-mh6m
https://github.com/FreeRDP/FreeRDP/commit/889348a86e49bc8f1351ed6496d847b32db5f86e (2.11.0)
https://github.com/FreeRDP/FreeRDP/commit/23db2f4e6ba71f1c10c543f24de595d7340adb46 (2.11.1)