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CVE-2023-4806

5.9 · MEDIUM

A flaw has been identified in glibc.

Published Sep 18, 2023CWE-416EPSS 1.61%

Overview

CVE-2023-4806 is a medium-severity vulnerability. It was published on September 18, 2023 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A flaw has been identified in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/errata/RHSA-2023:5453Refaccess.redhat.com/errata/RHSA-2023:5455Refaccess.redhat.com/errata/RHSA-2023:7409Refaccess.redhat.com/security/cve/CVE-2023-4806Refbugzilla.redhat.com/show_bug.cgi?id=2237782Refwww.openwall.com/lists/oss-security/2023/10/03/4Refwww.openwall.com/lists/oss-security/2023/10/03/5Refwww.openwall.com/lists/oss-security/2023/10/03/6Refwww.openwall.com/lists/oss-security/2023/10/03/8Refaccess.redhat.com/errata/RHSA-2023:5453

How CyberStrike helps

Frequently asked questions

What is CVE-2023-4806?

CVE-2023-4806 is a medium-severity vulnerability. It was published on September 18, 2023 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2023-4806?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-4806?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-4806?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-4806 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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