CVE-2020-26117

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Summary

CVECVE-2020-26117
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-09-27 04:15:00 UTC
Updated2022-11-16 14:13:00 UTC
DescriptionIn 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.

Risk And Classification

Problem Types: CWE-295

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 9.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Opensuse Leap 15.2 All All All
Operating System Opensuse Leap 15.2 All All All
Application Tigervnc Tigervnc All All All All
Application Tigervnc Tigervnc All All All All

References

ReferenceSourceLinkTags
[SECURITY] [DLA 2396-1] tigervnc security update MLIST lists.debian.org Third Party Advisory
Release TigerVNC 1.11.0 · TigerVNC/tigervnc · GitHub MISC github.com Release Notes, Third Party Advisory
Properly store certificate exceptions · TigerVNC/tigervnc@b30f10c · GitHub MISC github.com Patch, Third Party Advisory
[security-announce] openSUSE-SU-2020:1666-1: critical: Security update f SUSE lists.opensuse.org Third Party Advisory
[security-announce] openSUSE-SU-2020:1841-1: critical: Security update f SUSE lists.opensuse.org
Properly store certificate exceptions · TigerVNC/tigervnc@7399eab · GitHub MISC github.com Patch, Third Party Advisory
Properly store certificate exceptions in Java viewer · TigerVNC/tigervnc@20dea80 · GitHub MISC github.com Patch, Third Party Advisory
Bug 1176733 – VUL-0: CVE-2020-26117: tigervnc: certificate exceptions stored as authorities MISC bugzilla.opensuse.org Issue Tracking, Third Party Advisory
Properly store certificate exceptions in Java viewer · TigerVNC/tigervnc@f029745 · GitHub MISC github.com Patch, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159214 Oracle Enterprise Linux Security Update for tigervnc (ELSA-2021-1783)
  • 199544 Ubuntu Security Notification for TigerVNC Vulnerability (USN-5965-1)
  • 239304 Red Hat Update for tigervnc (RHSA-2021:1783)
  • 670867 EulerOS Security Update for tigervnc (EulerOS-SA-2020-2440)
  • 940318 AlmaLinux Security Update for tigervnc (ALSA-2021:1783)
  • 960833 Rocky Linux Security Update for tigervnc (RLSA-2021:1783)
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