Out-of-bounds read in libmicrodns - CVE-2020-6077

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Main Vulnerability Database Vulnerabilities #VU26337

Out-of-bounds read in libmicrodns - CVE-2020-6077

Published: March 24, 2020


Vulnerability identifier: #VU26337
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-2020-6077
CWE-ID: CWE-125
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).

The vulnerability exists within the message-parsing functionality due to a boundary condition when parsing mDNS messages. A remote attacker can send a specially crafted mDNS message, trigger out-of-bounds read error and cause a denial of service condition on the target system.


Affected software

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

How to mitigate CVE-2020-6077

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