| Name | CVE-2016-9942 |
| Description | Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions. |
| 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-1979-1, DLA-777-1, DSA-3753-1 |
| Debian Bugs | 850008 |
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 | |
| 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.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| italc | source | wheezy | (unfixed) | end-of-life | ||
| italc | source | jessie | 1:2.0.2+dfsg1-2+deb8u1 | DLA-1979-1 | ||
| italc | source | (unstable) | 1:3.0.2+dfsg1-1 | |||
| libvncserver | source | wheezy | 0.9.9+dfsg-1+deb7u2 | DLA-777-1 | ||
| libvncserver | source | jessie | 0.9.9+dfsg2-6.1+deb8u2 | DSA-3753-1 | ||
| libvncserver | source | (unstable) | 0.9.11+dfsg-1 | 850008 | ||
| veyon | source | (unstable) | 4.1.4+repack1-1 |
https://github.com/LibVNC/libvncserver/pull/137
https://github.com/LibVNC/libvncserver/pull/137/commits/5fff4353f66427b467eb29e5fdc1da4f2be028bb