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Advisories

FreeRDP before 3.32.2 X11 Client Abort via RDPGFX Scaled Output Geometry

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Severity
low
Date
Affecting

  • FreeRDP >= 0, < 3.32.2

CWE
  • CWE-20 Improper Input Validation
CVSS
2.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
Kushalkhemka, mayank-jangid-moon, opensec-intelligence
Description
FreeRDP before 3.32.2 fails to bound server-supplied target dimensions and output origin in RDPGFX MAPSURFACETOSCALEDOUTPUT PDUs, allowing malicious RDP servers to abort X11 clients. Attackers can map a surface to oversized scaled output, triggering checked UINT16 cast or freerdp_image_scale stride assertion failures that terminate the client.

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