CVE-2020-6080 Information

Description

An exploitable denial-of-service vulnerability exists in the resource allocation handling of Videolabs libmicrodns 0.1.0. When encountering errors while parsing mDNS messages some allocated data is not freed possibly leading to a denial-of-service condition via resource exhaustion. An attacker can send one mDNS message repeatedly to trigger this vulnerability through the function rr_read_RR [5] reads the current resource record except for the RDATA section. This is read by the loop at in rr_read. For each RR type a different function is called. When the RR type is 0x10 the function rr_read_TXT is called at [6].

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-2020-1002 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