Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.009
EPSS Ranking 75.5%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 5.8
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.html
- https://bugzilla.opensuse.org/show_bug.cgi?id=1176733
- https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cb
- https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562b
- https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cba
- https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6e
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0
- 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
- https://bugzilla.opensuse.org/show_bug.cgi?id=1176733
- https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cb
- https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562b
- https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cba
- https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6e
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0
- https://lists.debian.org/debian-lts-announce/2020/10/msg00007.html
Products affected by CVE-2020-26117
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cpe:2.3:a:tigervnc:tigervnc:-
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cpe:2.3:a:tigervnc:tigervnc:0.0.90
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cpe:2.3:a:tigervnc:tigervnc:0.0.91
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cpe:2.3:a:tigervnc:tigervnc:1.0
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cpe:2.3:a:tigervnc:tigervnc:1.0.0
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cpe:2.3:a:tigervnc:tigervnc:1.0.1
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cpe:2.3:a:tigervnc:tigervnc:1.0.90
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cpe:2.3:a:tigervnc:tigervnc:1.1
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cpe:2.3:a:tigervnc:tigervnc:1.1.0
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cpe:2.3:a:tigervnc:tigervnc:1.1.90
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cpe:2.3:a:tigervnc:tigervnc:1.10.0
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cpe:2.3:a:tigervnc:tigervnc:1.10.1
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cpe:2.3:a:tigervnc:tigervnc:1.2.0
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cpe:2.3:a:tigervnc:tigervnc:1.2.90
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cpe:2.3:a:tigervnc:tigervnc:1.3
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cpe:2.3:a:tigervnc:tigervnc:1.3.1
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cpe:2.3:a:tigervnc:tigervnc:1.3.90
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cpe:2.3:a:tigervnc:tigervnc:1.4.0
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cpe:2.3:a:tigervnc:tigervnc:1.4.1
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cpe:2.3:a:tigervnc:tigervnc:1.4.2
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cpe:2.3:a:tigervnc:tigervnc:1.4.3
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cpe:2.3:a:tigervnc:tigervnc:1.4.90
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cpe:2.3:a:tigervnc:tigervnc:1.5.0
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cpe:2.3:a:tigervnc:tigervnc:1.5.90
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cpe:2.3:a:tigervnc:tigervnc:1.6.0
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cpe:2.3:a:tigervnc:tigervnc:1.6.90
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cpe:2.3:a:tigervnc:tigervnc:1.7
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cpe:2.3:a:tigervnc:tigervnc:1.7.1
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cpe:2.3:a:tigervnc:tigervnc:1.7.90
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cpe:2.3:a:tigervnc:tigervnc:1.8.0
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cpe:2.3:a:tigervnc:tigervnc:1.8.90
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cpe:2.3:a:tigervnc:tigervnc:1.9.0
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cpe:2.3:a:tigervnc:tigervnc:1.9.90
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cpe:2.3:o:debian:debian_linux:9.0
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cpe:2.3:o:opensuse:leap:15.2