| Name | CVE-2020-26117 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2396-1 |
| Debian Bugs | 971272 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| tigervnc (PTS) | stretch (security), stretch (lts), stretch | 1.7.0+dfsg-7+deb9u2 | fixed |
| buster | 1.9.0+dfsg-3+deb10u3 | fixed | |
| bullseye | 1.11.0+dfsg-2+deb11u1 | fixed | |
| bookworm | 1.12.0+dfsg-8 | fixed | |
| sid, trixie | 1.13.1+dfsg-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| tigervnc | source | stretch | 1.7.0+dfsg-7+deb9u2 | DLA-2396-1 | ||
| tigervnc | source | buster | 1.9.0+dfsg-3+deb10u3 | |||
| tigervnc | source | (unstable) | 1.10.1+dfsg-9 | 971272 |
https://bugzilla.opensuse.org/show_bug.cgi?id=1176733
https://github.com/TigerVNC/tigervnc/commit/20dea801e747318525a5859fe4f37c52b05310cb (v1.11.0)
https://github.com/TigerVNC/tigervnc/commit/7399eab79a4365434d26494fa1628ce1eb91562b (v1.11.0)
https://github.com/TigerVNC/tigervnc/commit/b30f10c681ec87720cff85d490f67098568a9cba (master)
https://github.com/TigerVNC/tigervnc/commit/f029745f63ac7d22fb91639b2cb5b3ab56134d6e (master)