CVE-2023-32067
HIGHc-ares < 1.19.1 - Denial of Service via Malformed UDP Packet
Title source: llmDescription
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.
References (8)
Core 8
Core References
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/
Third Party Advisory
https://security.gentoo.org/glsa/202310-09
Third Party Advisory
https://www.debian.org/security/2023/dsa-5419
Vendor Advisory
https://security.netapp.com/advisory/ntap-20240605-0004/
Third Party Advisory x_refsource_confirm
https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc
Release Notes x_refsource_misc
https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1
Scores
CVSS v3
7.5
EPSS
0.0034
EPSS Percentile
57.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-400
Status
published
Products (5)
c-ares_project/c-ares
< 1.19.1
debian/debian_linux
10.0
debian/debian_linux
11.0
fedoraproject/fedora
37
fedoraproject/fedora
38
Published
May 25, 2023
Tracked Since
Feb 18, 2026