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CVE-2020-26117 Detail

Description

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.


Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  8.1 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.html Broken Link  Mailing List  Third Party Advisory 
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.html Broken Link  Mailing List  Third Party Advisory 
https://bugzilla.opensuse.org/show_bug.cgi?id=1176733 Issue Tracking  Third Party Advisory 
https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cb Patch  Third Party Advisory 
https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562b Patch  Third Party Advisory 
https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cba Patch  Third Party Advisory 
https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6e Patch  Third Party Advisory 
https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0 Release Notes  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/10/msg00007.html Mailing List  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-295 Improper Certificate Validation cwe source acceptance level NIST  

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-26117
NVD Published Date:
09/27/2020
NVD Last Modified:
11/16/2022
Source:
MITRE