Improper Input Validation Affecting tigervnc-server-module package, versions <0:1.0.90-0.15.20110314svn4359.el6_1.1


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.28% (69th percentile)

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  • Snyk IDSNYK-RHEL6-TIGERVNCSERVERMODULE-1430055
  • published26 Jul 2021
  • disclosed4 May 2011

Introduced: 4 May 2011

CVE-2011-1775  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade RHEL:6 tigervnc-server-module to version 0:1.0.90-0.15.20110314svn4359.el6_1.1 or higher.
This issue was patched in RHSA-2011:0871.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tigervnc-server-module package and not the tigervnc-server-module package as distributed by RHEL. See How to fix? for RHEL:6 relevant fixed versions and status.

The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.

CVSS Scores

version 3.1