CVE-2020-26117
tigervnc - security update
8.1
HIGH
CVSS 3.1
EPSS 0.69%
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.
How to fix CVE-2020-26117
To remediate CVE-2020-26117, upgrade the affected package to a fixed version below.
- —upgrade to 1.10.1+dfsg-9 or later
- —upgrade to 1.7.0+dfsg-7+deb9u2 or later
Is CVE-2020-26117 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.10.1+dfsg-9
- from 0, < 1.7.0+dfsg-7+deb9u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |