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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tigervnc | Tigervnc | < 1.11.0 |
| Debian | Debian Linux | 9.0 |
| Opensuse | Leap | 15.2 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.htmlBroken LinkMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.htmlBroken LinkMailing ListThird Party Advisory
- https://bugzilla.opensuse.org/show_bug.cgi?id=1176733Issue TrackingThird Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b053PatchThird Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91PatchThird Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568aPatchThird Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab5613PatchThird Party Advisory
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0Release NotesThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00007.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.htmlBroken LinkMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.htmlBroken LinkMailing ListThird Party Advisory
- https://bugzilla.opensuse.org/show_bug.cgi?id=1176733Issue TrackingThird Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b053PatchThird Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91PatchThird Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568aPatchThird Party Advisory
FAQ
What is CVE-2020-26117?
CVE-2020-26117 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 certi...
How severe is CVE-2020-26117?
CVE-2020-26117 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-26117?
Check the references section above for vendor advisories and patch information. Affected products include: Tigervnc Tigervnc, Debian Debian Linux, Opensuse Leap.