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.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3471-1 c-ares security update
Debian DSA Debian DSA DSA-5419-1 c-ares security update
EUVD EUVD EUVD-2023-36348 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.
Ubuntu USN Ubuntu USN USN-6164-1 c-ares vulnerabilities
Ubuntu USN Ubuntu USN USN-6164-2 c-ares vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00323}

epss

{'score': 0.00332}


Thu, 13 Feb 2025 17:15:00 +0000

Type Values Removed Values Added
First Time appeared C-ares
C-ares c-ares
CPEs cpe:2.3:a:c-ares:c-ares:*:*:*:*:*:*:*:*
Vendors & Products C-ares
C-ares c-ares
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-02-13T16:50:20.105Z

Reserved: 2023-05-01T16:47:35.314Z

Link: CVE-2023-32067

cve-icon Vulnrichment

Updated: 2024-08-02T15:03:28.668Z

cve-icon NVD

Status : Modified

Published: 2023-05-25T23:15:09.380

Modified: 2024-11-21T08:02:38.797

Link: CVE-2023-32067

cve-icon Redhat

Severity : Important

Publid Date: 2023-05-22T00:00:00Z

Links: CVE-2023-32067 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses