| Name | CVE-2017-18922 |
| Description | It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libvncserver (PTS) | jessie, jessie (lts) | 0.9.9+dfsg2-6.1+deb8u8 | vulnerable |
| stretch (security) | 0.9.11+dfsg-1.3~deb9u6 | vulnerable |
| stretch (lts), stretch | 0.9.11+dfsg-1.3~deb9u7 | vulnerable |
| buster (security), buster, buster (lts) | 0.9.11+dfsg-1.3+deb10u5 | vulnerable |
| bullseye | 0.9.13+dfsg-2+deb11u1 | fixed |
| sid, trixie, bookworm | 0.9.14+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libvncserver | source | jessie | (unfixed) | end-of-life | | |
| libvncserver | source | (unstable) | 0.9.12+dfsg-3 | | | |
Notes
[buster] - libvncserver <ignored> (Required change too invasive, minor issue)
[stretch] - libvncserver <ignored> (Required change too invasive, minor issue)
https://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433
https://www.openwall.com/lists/oss-security/2020/06/30/2