CVEvulnerability
CVE-2020-26117
8.1 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-09-27
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:N
- Weaknesses
- CWE-295
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.
Affected configurations
• tigervnc tigervnc (< 1.11.0)
• debian debian linux 9.0
• opensuse leap 15.2
Related
Weakness · CWE (1)
- CWE-295 Improper Certificate Validation weakness
References
- 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
- 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