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CVE-2023-32067

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Date: May 25, 2023

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.

Language: C

Severity Score

Related Resources (12)

https://access.redhat.com/security/cve/CVE-2023-32067
https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/
https://www.debian.org/security/2023/dsa-5419
https://nvd.nist.gov/vuln/detail/CVE-2023-32067
https://security.gentoo.org/glsa/202310-09
https://security.netapp.com/advisory/ntap-20240605-0004/
https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/
https://github.com/c-ares/c-ares/commit/b9b8413cfdb70a3f99e1573333b23052d57ec1ae
https://lists.debian.org/debian-lts-announce/2023/06/msg00034.html
https://www.mend.io/vulnerability-database/CVE-2023-32067

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Insufficient Information

NVD-CWE-noinfo

Top Fix

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Upgrade Version

Upgrade to version cares-1_19_1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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