Improper Certificate Validation Affecting freerdp-debuginfo package, versions <2:3.6.3-1.amzn2023.0.15


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.27% (19th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-AMZN2023-FREERDPDEBUGINFO-19476483
  • published1 Sept 2026
  • disclosed1 Aug 2026

Introduced: 1 Aug 2026

CVE-2026-67294  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 freerdp-debuginfo to version 2:3.6.3-1.amzn2023.0.15 or higher.
This issue was patched in ALAS2023-2026-2111.

NVD Description

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

FreeRDP before 3.29.0 improperly validates the Extended Key Usage (EKU) purpose of the peer certificate during client-side server TLS authentication. In x509_utils_verify(), when server-purpose (X509_PURPOSE_SSL_SERVER) verification fails, the code falls back to client-purpose and any-purpose verification, so a trusted, hostname-matching certificate valid only for clientAuth can be accepted as the RDP server certificate. In environments relying on EKU separation between client and server certificates, this allows a clientAuth-only certificate issued by a trusted CA to bypass server certificate purpose validation.

CVSS Base Scores

version 3.1