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Fencer Vulns
critical 9.8

CVE-2020-6072 json

An exploitable code execution vulnerability exists in the label-parsing functionality of Videolabs libmicrodns 0.1.0.

published 2020-03-24 6 y ago modified 2026-10-08 31 d ago also EUVD-2020-27226

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.8%
EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

An exploitable code execution vulnerability exists in the label-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing compressed labels in mDNS messages, the rr_decode function's return value is not checked, leading to a double free that could be exploited to execute arbitrary code. An attacker can send an mDNS message to trigger this vulnerability.

Patch / fix

  • vlc Debian 14, Debian 13, Debian 12 3.0.8-4
  • libmicrodns Debian 14, Debian 13 0.2.0-1

debian advisories DEBIAN-CVE-2020-6072

  • vlc Ubuntu Pro 18.04 LTS 3.0.8-0ubuntu18.04.1+esm3
  • libmicrodns Ubuntu Pro 18.04 LTS 0.0.8-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-6072

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • vlc Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 3.0.9.2-r0

alpine advisories ALPINE-CVE-2020-6072

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libmicrodns Arch Linux 0.1.2-1

arch linux advisories AVG-1136

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
31 d ago

Exploit prediction

3.80% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2020-0995 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a Videolabs

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.