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Advisories

FreeRDP - Heap-buffer-overflow in gdi_CacheToSurface via rectangle validation bypass

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severity
high
date
Affecting

  • FreeRDP < 3.26.0

CWE
  • CWE-122 Heap-based Buffer Overflow
CVSS
8.6
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
kevin-valerio
Description
FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface that allows remote attackers to write out-of-bounds heap memory. The vulnerability occurs because rectangle validation clamps coordinates to UINT16_MAX but performs copy operations using unclamped cache entry dimensions, enabling malicious RDP servers to trigger large out-of-bounds writes and potentially achieve remote code execution or client crash.

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