CVE-2020-6078

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.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-25)

CWE

CWE-252

Published

2020-03-24

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• videolabs:libmicrodns

References

• https://security.gentoo.org/glsa/202005-10
• https://talosintelligence.com/vulnerability_reports/TALOS-2020-1001
• https://www.debian.org/security/2020/dsa-4671
• https://security.gentoo.org/glsa/202005-10
• https://talosintelligence.com/vulnerability_reports/TALOS-2020-1001

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