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.
CVE-2023-32067 - High Severity Vulnerability
A C library for asynchronous DNS requests.
Library home page: https://c-ares.haxx.se/?wsslib=c-ares
Found in HEAD commit: d388e16464e00b9ce84df0d247029f534a429b90
Found in base branch: main
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.
Publish Date: 2023-05-25
URL: CVE-2023-32067
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: High
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc
Release Date: 2023-05-02
Fix Resolution: cares-1_19_1
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