Resource exhaustion in libmicrodns - CVE-2020-6079

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Main Vulnerability Database Vulnerabilities #VU26340

Resource exhaustion in libmicrodns - CVE-2020-6079

Published: March 24, 2020


Vulnerability identifier: #VU26340
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-6079
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to encountering errors while parsing mDNS messages in the "rr_decode" function in the resource allocation handling. A remote attacker can send mDNS messages, trigger resource exhaustion and perform a denial of service (DoS) attack.


Affected software

libmicrodns
Arch Linux
Gentoo Linux
Ubuntu
vlc (Debian package)
vlc (Alpine package)
libmicrodns0 (Ubuntu package)
VLC Media Player

How to mitigate CVE-2020-6079

Install updates from vendor's website.

libmicrodns - update to 0.1.1
vlc (Debian package) - update to 3.0.10-0+deb9u1
VLC Media Player - update to 3.0.9.2
vlc (Alpine package) - update to 3.0.9.2-r0
libmicrodns0 (Ubuntu package) - update to Ubuntu Pro

External References

Related Security Bulletins