| Name | CVE-2020-6078 |
| Description | An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages in mdns_recv, the return value of the mdns_read_header function is not checked, leading to an uninitialized variable usage that eventually results in a null pointer dereference, leading to service crash. An attacker can send a series of mDNS messages to trigger this vulnerability. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4671-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libmicrodns (PTS) | sid, trixie | 0.2.0-1 | fixed |
| vlc (PTS) | bullseye (security), bullseye | 3.0.21-0+deb11u1 | fixed |
| bookworm, bookworm (security) | 3.0.21-0+deb12u1 | fixed |
| sid, trixie | 3.0.21-9 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libmicrodns | source | (unstable) | 0.2.0-1 | | | |
| vlc | source | jessie | (unfixed) | end-of-life | | |
| vlc | source | stretch | 3.0.10-0+deb9u1 | | DSA-4671-1 | |
| vlc | source | buster | 3.0.10-0+deb10u1 | | DSA-4671-1 | |
| vlc | source | (unstable) | 3.0.8-4 | | | |
Notes
[jessie] - vlc <end-of-life> (Not supported in jessie LTS)
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1001
These were addressed on the source level in 3.0.9, but 3.0.8-4 disables the plugin