CVE-2022-0934

Publication date 7 April 2022

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
dnsmasq	22.10 kinetic	Fixed 2.86-1.1ubuntu1
	22.04 LTS jammy	Fixed 2.86-1.1ubuntu0.1
	21.10 impish	Fixed 2.85-1ubuntu2.1
	20.04 LTS focal	Fixed 2.80-1.1ubuntu1.5
	18.04 LTS bionic	Fixed 2.79-1ubuntu0.6
	16.04 LTS xenial	Fixed 2.75-1ubuntu0.16.04.10+esm1 Ubuntu Pro
	14.04 LTS trusty	Fixed 2.68-1ubuntu0.2+esm1 Ubuntu Pro

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
dnsmasq	Upstream: https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=03345ecefeb0d82e3c3a4c28f27c3554f0611b39 Vendor: https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016272.html

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-5408-1
Dnsmasq vulnerability
10 May 2022