Improper Certificate Validation Affecting xorg-x11-Xvnc package, versions <1.8.0-13.14.1


Severity

Recommended
0.0
critical
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
3.06% (86th percentile)

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  • Snyk IDSNYK-SLES150-XORGX11XVNC-2699598
  • published14 Apr 2022
  • disclosed9 Oct 2020

Introduced: 9 Oct 2020

CVE-2020-26117  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade SLES:15.0 xorg-x11-Xvnc to version 1.8.0-13.14.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-Xvnc package and not the xorg-x11-Xvnc package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.

CVSS Base Scores

version 3.1