Unchecked Return Value in libmicrodns - CVE-2020-6078

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Main Vulnerability Database Vulnerabilities #VU26338

Unchecked Return Value in libmicrodns - CVE-2020-6078

Published: March 24, 2020


Vulnerability identifier: #VU26338
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-2020-6078
CWE-ID: CWE-252
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 within the message-parsing functionality due to the "mdns_read_header" function is not checked when parsing mDNS messages in "mdns_recv". A remote attacker can send a specially crafted mDNS message 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-2020-6078

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