CVE-2020-26117
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
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.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-26117
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:1783
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-26117.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| rocky | 8 | fixed | |
| debian | bookworm | fixed | 1.10.1+dfsg-9 |
| debian | bullseye | fixed | 1.10.1+dfsg-9 |
| debian | forky | fixed | 1.10.1+dfsg-9 |
| debian | sid | fixed | 1.10.1+dfsg-9 |
| debian | trixie | fixed | 1.10.1+dfsg-9 |
References
Verify integrity in audit chain (admin only). AS-IS.