CVE-2023-39356 Missing offset validation leading to Out-of-Bounds Read in FreeRDP
An attacker can cause a crash in FreeRDP by triggering an out-of-bounds read due to missing offset validation in the gdi_multi_opaque_rect function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-39356?
CVE-2023-39356 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 31 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2023-39356?
It affects 3 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Freerdp Freerdp.
How do I fix CVE-2023-39356?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-39356 being exploited?
There is no known exploitation of CVE-2023-39356 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2023-39356, GHSA-q5v5-qhj5-mh6m, UBUNTU-CVE-2023-39356.