CVE-2023-32067

0-byte UDP payload DoS in c-ares

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.32%
Third-Party Advisory github.com Third-Party Advisory fedoraproject.org Third-Party Advisory fedoraproject.org Third-Party Advisory gentoo.org Third-Party Advisory debian.org
Affected: c-ares c-ares
Published at:
Updated at:

References

Link Tags
https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc third party advisory
https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1 release notes
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/ third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/ third party advisory mailing list
https://www.debian.org/security/2023/dsa-5419 third party advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00034.html mailing list
https://security.gentoo.org/glsa/202310-09 third party advisory
https://security.netapp.com/advisory/ntap-20240605-0004/

Frequently Asked Questions

What is the severity of CVE-2023-32067?
CVE-2023-32067 has been scored as a high severity vulnerability.
How to fix CVE-2023-32067?
To fix CVE-2023-32067, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-32067 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-32067 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-32067?
CVE-2023-32067 affects c-ares c-ares.
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