CVE-2020-6078 Information

Description

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 Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5