CVE-2023-32067

Publication date 25 May 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
c-ares	23.10 mantic	Not affected
	23.04 lunar	Fixed 1.18.1-2ubuntu0.1
	22.10 kinetic	Fixed 1.18.1-1ubuntu0.22.10.2
	22.04 LTS jammy	Fixed 1.18.1-1ubuntu0.22.04.2
	20.04 LTS focal	Fixed 1.15.0-1ubuntu0.3
	18.04 LTS bionic	Fixed 1.14.0-1ubuntu0.2+esm1 Ubuntu Pro
	16.04 LTS xenial	Fixed 1.10.0-3ubuntu0.2+esm2 Ubuntu Pro
	14.04 LTS trusty	Ignored end of standard support

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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
c-ares	Upstream: b9b8413

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

CVE-2023-32067

Cvss 3 Severity Score

Status

Get expanded security coverage with Ubuntu Pro

Patch details

Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references