FreeRDP: DoS via WINPR_ASSERT in rts_read_auth_verifier_no_checks
Summary
FreeRDP: DoS via WINPR_ASSERT in rts_read_auth_verifier_no_checks
Original description
The description as published by the source.
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-33952 freerdp2
- Ubuntu UBUNTU-CVE-2026-33952 freerdp
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com