Improper Certificate Validation Affecting tigervnc-icons package, versions <0:1.11.0-6.el8


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.39% (75th percentile)

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  • Snyk IDSNYK-ORACLE8-TIGERVNCICONS-2582967
  • published10 Apr 2022
  • disclosed27 Sept 2020

Introduced: 27 Sep 2020

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

How to fix?

Upgrade Oracle:8 tigervnc-icons to version 0:1.11.0-6.el8 or higher.
This issue was patched in ELSA-2021-1783.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tigervnc-icons package and not the tigervnc-icons package as distributed by Oracle. See How to fix? for Oracle:8 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 Scores

version 3.1