CVE-2026-67292

Description

FreeRDP before 3.29.0 contains a buffer over-disclosure vulnerability in the gateway WebSocket transport (libfreerdp/core/gateway/websocket.c). The client's Pong reply reuses a fixed 1024-byte response stream whose length is not sealed to the actual received Ping payload, so a malicious gateway/WebSocket peer sending a non-empty Ping control frame causes the client to reply with an overlong Pong that discloses bytes beyond the received payload (the peer receives the masking key and can unmask the reply). A zero-length Ping reaches an assertion and terminates the client (denial of service).

References

https://www.vulncheck.com/advisories/freerdp-before-websocket-ping-buffer-over-disclosure

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8v6m-2cmc-chx9

https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af319f

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4