CVE-2023-32067

Publication date 25 May 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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

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
16.04 LTS xenial
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

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-6164-2
    • c-ares vulnerabilities
    • 11 September 2023

Other references