REDHAT-BUG-2483471: High severity FreeRDP vulnerability
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client by sending crafted RDPGFX PDUs. The bug is in gdiCacheToSurface: it validates a destination rectangle that is clamped to UINT16MAX, but then performs the copy using the original cacheEntry->width/height. This can cause a large out-of-bounds heap write and may lead to client crashes or code execution. This bug is reachable from a malicious RDP server, but only when the client has RDPGFX enabled. This vulnerability is fixed in 3.26.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
FreeRDPto a version that resolves this vulnerability.Fixed in 3.26.0
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2483471?
The severity of REDHAT-BUG-2483471 is classified as high with a severity score of 7.
How do I fix REDHAT-BUG-2483471?
To fix REDHAT-BUG-2483471, update FreeRDP to version 3.26.0 or later.
What is the impact of REDHAT-BUG-2483471?
The impact of REDHAT-BUG-2483471 can lead to a heap-buffer-overflow vulnerability in the FreeRDP client.
Who is affected by REDHAT-BUG-2483471?
Users of FreeRDP prior to version 3.26.0 are affected by REDHAT-BUG-2483471.
What type of vulnerability is REDHAT-BUG-2483471?
REDHAT-BUG-2483471 is a heap-buffer-overflow vulnerability triggered by a malicious RDP server.