---
id: CVE-2020-6078
title: >-
  An exploitable denial-of-service vulnerability exists in the message-parsing
  functionality of Videolabs libmicrodns 0.1.0
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-252
vendor: videolabs
product: libmicrodns
affected:
  - libmicrodns = 0.1.0
  - debian_linux = 9.0
  - debian_linux = 10.0
published: '2020-03-24'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:17:01.993'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-6078'
references:
  - url: 'https://security.gentoo.org/glsa/202005-10'
    label: talos-cna@cisco.com
  - url: 'https://talosintelligence.com/vulnerability_reports/TALOS-2020-1001'
    label: talos-cna@cisco.com
  - url: 'https://www.debian.org/security/2020/dsa-4671'
    label: talos-cna@cisco.com
  - url: 'https://security.gentoo.org/glsa/202005-10'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://talosintelligence.com/vulnerability_reports/TALOS-2020-1001'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2020/dsa-4671'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.03146
epssPercentile: 0.87544
ingestedAt: '2026-10-08T23:16:47.305Z'
---

## Overview

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.

## Affected

- `libmicrodns = 0.1.0`
- `debian_linux = 9.0`
- `debian_linux = 10.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.