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CVE-2023-31130

20
FAUCET Score

CVE-2023-31130 is a buffer underflow vulnerability in the c-ares asynchronous resolver library, specifically within the ares_inet_net_pton() function when processing certain IPv6 addresses. This flaw primarily affects c-ares and products incorporating it, such as Debian and Fedora distributions. The vulnerability has a CVSS score of 6.4 (Medium), indicating a local attack vector with high attack complexity, requiring high privileges to exploit. A successful exploit could lead to high confidentiality, integrity, and availability impacts. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal, suggesting low public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.19.1CPE matchmatch criteria
cpe:2.3:a:c-ares_project:c-ares:*:*:*:*:*:*:*:*
37CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
38CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.1MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
0.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 84th percentile among its peer group of 418 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (21)

microsoftpatch availablevia msrc
Product: cm1 c-ares 1.19.1-1 on CBL Mariner 1.0Fixed in: 1.19.1-1
microsoftpatch availablevia msrc
Product: cbl2 c-ares 1.19.1-1 on CBL Mariner 2.0Fixed in: 1.19.1-1
microsoftpatch availablevia msrc
Product: cbl2 python-gevent 21.1.2-3 on CBL Mariner 2.0Fixed in: 21.1.2-3
microsoftpatch availablevia msrc
Product: cbl2 nodejs18 18.17.1-2 on CBL Mariner 2.0Fixed in: 18.17.1-2
microsoftpatch availablevia msrc
Product: cbl2 nodejs 16.20.1-2 on CBL Mariner 2.0Fixed in: 16.20.1-2
microsoftpatch availablevia msrc
Product: cbl2 grpc 1.42.0-11 on CBL Mariner 2.0Fixed in: 1.42.0-11
microsoftpatch availablevia msrc
Product: cbl2 fluent-bit 2.1.10-1 on CBL Mariner 2.0Fixed in: 2.1.10-1
microsoftpatch availablevia msrc
Product: azl3 grpc 1.62.0-2 on Azure Linux 3.0Fixed in: 1.62.0-2
microsoftpatch availablevia msrc
Product: azl3 grpc 1.42.0-7 on Azure Linux 3.0Fixed in: 1.62.0-2
microsoftpatch availablevia msrc
Product: azl3 ceph 18.2.2-8 on Azure Linux 3.0Fixed in: 18.2.2-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:16-8080020230608150024.63b34585
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-nodejs14-nodejs-0:14.21.3-4.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:18-8080020230607122508.63b34585
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: c-ares-0:1.13.0-9.el8_9.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: nodejs:16-8060020230620060944.ad008a3a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: c-ares-0:1.13.0-6.el8_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: c-ares-0:1.13.0-6.el8_8.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nodejs:18-9020020230531092345.rhel9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nodejs-1:16.19.1-2.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: c-ares-0:1.19.1-1.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: nodejs-1:16.18.1-4.el9_0
View patch

Vendor Advisories (2)

redhatCVE-2023-31130Moderate

c-ares: Buffer Underwrite in ares_inet_net_pton()

May 22, 2023
microsoft2023-May/CVE-2023-31130Moderate

Buffer Underwrite in ares_inet_net_pton()

May 9, 2023

References

github.com / c-ares/c-ares/releases/tag/cares-1_19_1
Release Notes
github.com / c-ares/c-ares/security/advisories/GHSA-x6mf-cxr9-8q6v
Third Party Advisory
lists.debian.org / debian-lts-announce/2023/06/msg00034.html
Mailing List
lists.fedoraproject.org / archives/list/[email protected]/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202310-09
Third Party Advisory
security.netapp.com / advisory/ntap-20240605-0005
debian.org / security/2023/dsa-5419
Third Party Advisory