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Medium severity · published May 25, 2023
CVE-2023-31130
c-ares is an asynchronous resolver library
6.4
CVSS
0.4%
EPSS
No
On KEV
Description
c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular "0::00:00:00/2" was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% 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-2023-31130
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-31130
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-x6mf-cxr9-8q6v
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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