Improper Handling of Length Parameter Inconsistency Affecting freerdp package, versions <2:3.6.3-1.amzn2023.0.10


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-AMZN2023-FREERDP-16067818
  • published15 Apr 2026
  • disclosed30 Mar 2026

Introduced: 30 Mar 2026

NewCVE-2026-33952  (opens in a new tab)
CWE-130  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 freerdp to version 2:3.6.3-1.amzn2023.0.10 or higher.
This issue was patched in ALAS2023-2026-1549.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp package and not the freerdp package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1