CVE-2020-26117
HIGH
8.1
CVSS Score
Published: September 27, 2020 at 03:30 AM UTC
Updated: June 17, 2026 at 03:07 AM UTC
3 products affected across 3 vendorsDebian LinuxLeapTigervnc
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Severity
HIGH8.1
Exploit prediction
EPSS 3%
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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%Leap· openSUSEdrupal
95%v < 1.11.0
Affected range stops below 1.11.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.html
- https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cb
- https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562b
- https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cba
References (9)
Vendor Advisoryx_refsource_SUSEBroken LinkMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.htmlVendor Advisoryx_refsource_SUSEBroken LinkMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.htmlx_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.opensuse.org/show_bug.cgi?id=1176733x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cbx_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562bx_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cbax_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6ex_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-295
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