VulnerabilityModified
CVE-2023-32067
c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service.
HIGH 7.5EPSS 1.58%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.58% probability · 74th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- c-ares project/c-ares · fedoraproject/fedora · debian/debian linux
- Source
- security-advisories@github.com
References
- https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1Release Notes
- https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vcThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00034.htmlMailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202310-09Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240605-0004/
- https://www.debian.org/security/2023/dsa-5419Third Party Advisory
- https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1Release Notes
- https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vcThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00034.htmlMailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202310-09Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240605-0004/
- https://www.debian.org/security/2023/dsa-5419Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.