| Name | CVE-2020-25708 |
| Description | A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service. |
| 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-2451-1, DLA-3125-1 |
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 | 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 |
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 | stretch | 0.9.11+dfsg-1.3~deb9u6 | DLA-2451-1 | ||
| libvncserver | source | buster | 0.9.11+dfsg-1.3+deb10u5 | DLA-3125-1 | ||
| libvncserver | source | (unstable) | 0.9.13+dfsg-1 |
https://github.com/LibVNC/libvncserver/issues/409
https://github.com/LibVNC/libvncserver/commit/673c07a75ed844d74676f3ccdcfdc706a7052dba