| Name | CVE-2018-20020 |
| Description | LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution |
| 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-1617-1, DLA-1979-1, DLA-2016-1, DSA-4383-1 |
| Debian Bugs | 916941, 945827 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| italc (PTS) | jessie, jessie (lts) | 1:2.0.2+dfsg1-2+deb8u1 | fixed |
| stretch | 1:3.0.3+dfsg1-1+deb9u1 | fixed |
| libvncserver (PTS) | jessie, jessie (lts) | 0.9.9+dfsg2-6.1+deb8u8 | fixed |
| stretch (security) | 0.9.11+dfsg-1.3~deb9u6 | fixed |
| stretch (lts), stretch | 0.9.11+dfsg-1.3~deb9u7 | fixed |
| buster (security), buster, buster (lts) | 0.9.11+dfsg-1.3+deb10u5 | fixed |
| bullseye | 0.9.13+dfsg-2+deb11u1 | fixed |
| sid, trixie, bookworm | 0.9.14+dfsg-1 | fixed |
| ssvnc (PTS) | jessie, jessie (lts) | 1.0.29-2+deb8u1 | fixed |
| stretch | 1.0.29-3+deb9u1 | fixed |
| buster | 1.0.29-4+deb10u1 | fixed |
| bullseye | 1.0.29-5 | fixed |
| bookworm | 1.0.29-6 | fixed |
| sid, trixie | 1.0.29-6.1 | fixed |
| veyon (PTS) | buster | 4.1.7+repack1-1 | fixed |
| bullseye | 4.5.3+repack1-1 | fixed |
| bookworm | 4.7.5+repack1-1 | fixed |
| sid, trixie | 4.7.5+repack1-1.2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[stretch] - italc <not-affected> (Incomplete fix for CVE-2018-20019 not applied)
https://github.com/LibVNC/libvncserver/issues/250
https://github.com/LibVNC/libvncserver/commit/09f2f3fb6a5a163e453e5c2979054670c39694bc
https://github.com/LibVNC/libvncserver/commit/7b1ef0ffc4815cab9a96c7278394152bdc89dc4d
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/
same as CVE-2019-8287/tightvnc