| 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, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, 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) | bullseye | 0.9.13+dfsg-2+deb11u1 | fixed |
| bookworm | 0.9.14+dfsg-1 | fixed |
| trixie | 0.9.15+dfsg-1 | fixed |
| forky, sid | 0.9.15+dfsg-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| 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