CVE Vulnerability

CVE-2020-26117

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.

5.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

8.1 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

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

Configuration 1

cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
Information

Published : 2020-09-27 04:15

Updated : 2022-11-16 02:13

NVD link : CVE-2020-26117

Mitre link : CVE-2020-26117

Products Affected
No products.
CWE
CWE-295

Improper Certificate Validation