FreeRDP 3.0.0 before 3.32.2 Denial of Service via RemoteFX Region Assertion

Summary

FreeRDP from 3.0.0 before 3.32.2 contains a denial of service vulnerability that allows malicious RDP servers to abort clients built with verbose WinPR assertions by sending crafted RemoteFX region rectangles. Attackers can supply a rectangle with x set to 65535 alongside a SurfaceBits destination left of 1, triggering a 16-bit coordinate assertion in rfx_process_message that terminates the client process.

Remediation

1. Inventory every FreeRDP FreeRDP deployment, including staging.
2. Upgrade FreeRDP FreeRDP to 3.32.2.
3. Confirm the running version after the upgrade.

References

• Advisoryhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7qw2-8h66-pvpw
• Advisoryhttps://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.2-denial-of-service-via-remotefx-region-assertion