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High severity · published May 25, 2023
CVE-2023-32067
c-ares is an asynchronous resolver library
7.5
CVSS
1.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
C-ares · C-ares Project
before 1.19.1 · source: NVD
DL
Debian Linux · Debian
10.0; 11.0 · source: NVD
FE
Fedora · Fedoraproject
37; 38 · source: NVD
Affected product
CA
C-ares
C-ares Project
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-32067
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-32067
Release Notes
https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1
Third Party Advisory
https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc
Mailing List
https://lists.debian.org/debian-lts-announce/2023/06/msg00034.html
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/
Third Party Advisory
https://security.gentoo.org/glsa/202310-09
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