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CVE-2023-5517

7.5 · HIGH

A flaw in query-handling code can cause `named` to exit prematurely with an assertion failure when: - `nxdomain-redirect <domain>;` is configured, and - the resolver receives a PTR query for a…

Published Feb 13, 2024CWE-617EPSS 1.24%

Overview

CVE-2023-5517 is a high-severity vulnerability. It was published on February 13, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A flaw in query-handling code can cause `named` to exit prematurely with an assertion failure when:

- `nxdomain-redirect <domain>;` is configured, and

- the resolver receives a PTR query for an RFC 1918 address that would normally result in an authoritative NXDOMAIN response.

This issue affects BIND 9 versions 9.12.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

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

Refwww.openwall.com/lists/oss-security/2024/02/13/1Refkb.isc.org/docs/cve-2023-5517Reflists.fedoraproject.org/archives/list/[email protected]/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/Reflists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/Reflists.fedoraproject.org/archives/list/[email protected]/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/Reflists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/Refsecurity.netapp.com/advisory/ntap-20240503-0006/Refwww.openwall.com/lists/oss-security/2024/02/13/1Refkb.isc.org/docs/cve-2023-5517Reflists.fedoraproject.org/archives/list/[email protected]/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-5517?

CVE-2023-5517 is a high-severity vulnerability. It was published on February 13, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-5517?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-5517?

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-2023-5517?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-5517 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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