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Status published
High
CVE-2020-26117
In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0
- https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6e
- https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cba
- https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cb
- https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562b
- https://bugzilla.opensuse.org/show_bug.cgi?id=1176733
- https://lists.debian.org/debian-lts-announce/2020/10/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.html
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Affected Vendor
tigervnc
View all reports →Affected Software
tigervnc, debian linux, leap
Vulnerable Versions:
0, 9.0, 15.2
Timeline
Official Publish:
September 27th, 2020
Last Modified:
August 4th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.