| Name | CVE-2018-20024 |
| Description | LibVNC before commit 4a21bbd097ef7c44bb000c3bd0907f96a10e4ce7 contains null pointer dereference in VNC client code that can result DoS. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
| References | DLA-1617-1, DLA-1979-1, DLA-2016-1, DSA-4383-1 |
| Debian Bugs | 916941, 945827 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libvncserver (PTS) | buster | 0.9.11+dfsg-1.3+deb10u4 | fixed |
| buster (security) | 0.9.11+dfsg-1.3+deb10u5 | fixed | |
| bullseye | 0.9.13+dfsg-2+deb11u1 | fixed | |
| bookworm, sid | 0.9.14+dfsg-1 | fixed | |
| ssvnc (PTS) | buster | 1.0.29-4+deb10u1 | fixed |
| bullseye | 1.0.29-5 | fixed | |
| bookworm, sid | 1.0.29-6 | fixed | |
| veyon (PTS) | buster | 4.1.7+repack1-1 | fixed |
| bullseye | 4.5.3+repack1-1 | fixed | |
| bookworm, sid | 4.7.5+repack1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| italc | source | jessie | 1:2.0.2+dfsg1-2+deb8u1 | DLA-1979-1 | ||
| italc | source | stretch | 1:3.0.3+dfsg1-1+deb9u1 | |||
| italc | source | (unstable) | (unfixed) | |||
| libvncserver | source | jessie | 0.9.9+dfsg2-6.1+deb8u4 | DLA-1617-1 | ||
| libvncserver | source | stretch | 0.9.11+dfsg-1.3~deb9u1 | DSA-4383-1 | ||
| libvncserver | source | (unstable) | 0.9.11+dfsg-1.2 | 916941 | ||
| ssvnc | source | jessie | 1.0.29-2+deb8u1 | DLA-2016-1 | ||
| ssvnc | source | stretch | 1.0.29-3+deb9u1 | |||
| ssvnc | source | buster | 1.0.29-4+deb10u1 | |||
| ssvnc | source | (unstable) | 1.0.29-5 | 945827 | ||
| veyon | source | (unstable) | 4.1.4+repack1-1 |
https://github.com/LibVNC/libvncserver/issues/254
https://github.com/LibVNC/libvncserver/commit/4a21bbd097ef7c44bb000c3bd0907f96a10e4ce7
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-034-libvnc-null-pointer-dereference/