HOME VULNERABILITIESCVE-2023-31130

MEDIUM

CVE-2023-31130

CWE-124Published: May 25, 2023· Updated: Jun 17, 2026

6.4

CVSS v3.1

Official 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.

Technical Analysis

CVE-2023-31130 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.4.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges Req.High

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

c-ares_project1 product(s)

c-ares

Debian1 product(s)

debian linux

Fedora1 product(s)

fedora

Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/c-ares/c-ares/security/advisories/GHSA-x6mf-cxr9-8q6v

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/

ADVISORYhttps://security.gentoo.org/glsa/202310-09

ADVISORYhttps://www.debian.org/security/2023/dsa-5419

ADVISORYhttps://github.com/c-ares/c-ares/security/advisories/GHSA-x6mf-cxr9-8q6v

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/

ADVISORYhttps://security.gentoo.org/glsa/202310-09

ADVISORYhttps://www.debian.org/security/2023/dsa-5419

All References (16)

→

https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1Release Notes

→

https://github.com/c-ares/c-ares/security/advisories/GHSA-x6mf-cxr9-8q6vThird Party Advisory

→

https://lists.debian.org/debian-lts-announce/2023/06/msg00034.htmlMailing List

→

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/Mailing List · Third Party Advisory

→

https://security.gentoo.org/glsa/202310-09Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20240605-0005/

→

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-x6mf-cxr9-8q6vThird Party Advisory

→

https://lists.debian.org/debian-lts-announce/2023/06/msg00034.htmlMailing List

→

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/Mailing List · Third Party Advisory

→

https://security.gentoo.org/glsa/202310-09Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20240605-0005/

Quick Facts

CVE IDCVE-2023-31130

CVSS Score6.4 / 10

SeverityMEDIUM

WeaknessCWE-124

CISA KEVNo

Affected3 vendor(s)

PublishedMay 25, 2023

Related CVEs (CWE-124)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2023-31130 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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