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CVE-2020-26117

Published: Sep 27, 2020Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-295
NVD MITRE
8.1CVSSHIGH
EPSS Score
3.1%
Top 14.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-295

Affected Products

n/an/a
tigervnctigervnc
On-prem
Communications
debian linuxdebian
On-premOS
Operating Systems / linux-distro
leapopensuse
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
tigervncoss-projectCommunications
debianoss-projectGBOperating Systemsaka debian gnu/linux
opensuseoss-projectDEOperating Systemsaka opensuse
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0
github.com
https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6e
github.com
https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cba
github.com
and 16 more references View all →

Timeline

Published
Sep 27, 2020
Last Updated
Nov 21, 2024

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