Integer overflow in libmicrodns - CVE-2020-6073

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Main Vulnerability Database Vulnerabilities #VU26339

Integer overflow in libmicrodns - CVE-2020-6073

Published: March 24, 2020


Vulnerability identifier: #VU26339
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-2020-6073
CWE-ID: CWE-190
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 integer overflow in the TXT record-parsing functionality when parsing the RDATA section in a TXT record in mDNS messages. A remote attacker can send a specially crafted mDNS message, trigger integer overflow 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-2020-6073

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