cve/2023/CVE-2023-39356.md

### [CVE-2023-39356](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39356)
![](https://img.shields.io/static/v1?label=Product&message=FreeRDP&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%202.11.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-125%3A%20Out-of-bounds%20Read&color=brighgreen)

### 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.

### POC

#### Reference
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q5v5-qhj5-mh6m

#### Github
No PoCs found on GitHub currently.