VulnerabilityModified
CVE-2020-26117
In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions.
HIGH 8.1EPSS 3.06%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.06%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- EPSS
- 3.06% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- tigervnc/tigervnc · debian/debian linux · opensuse/leap
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.htmlBroken Link, Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.htmlBroken Link, Mailing List, Third Party Advisory
- https://bugzilla.opensuse.org/show_bug.cgi?id=1176733Issue Tracking, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cbPatch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562bPatch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cbaPatch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6ePatch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00007.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.htmlBroken Link, Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.htmlBroken Link, Mailing List, Third Party Advisory
- https://bugzilla.opensuse.org/show_bug.cgi?id=1176733Issue Tracking, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cbPatch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562bPatch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cbaPatch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6ePatch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00007.htmlMailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.