CVE-2023-5517

HIGHNVD 7.57.5—

7.5

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

nxdomain-redirect ; 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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 34.3%
KEV: Not listed

Published

February 13, 2024

Last Modified

November 21, 2024

References (14)

security-officer@ischttp://www.openwall.com/lists/oss-security/2024/02/13/1
security-officer@ischttps://kb.isc.org/docs/cve-2023-5517
security-officer@ischttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/
security-officer@ischttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/
security-officer@ischttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/
security-officer@ischttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
security-officer@ischttps://security.netapp.com/advisory/ntap-20240503-0006/
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/02/13/1
af854a3a-2127-422b-91ae-364da2661108https://kb.isc.org/docs/cve-2023-5517
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240503-0006/

Vendor Advisories for CVE-2023-5517(7)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(9)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	dnsutils (1:9.18.18-0ubuntu0.22.04.2) @ jammy	2026-05-24	ubuntu
ubuntu	dnsutils (1:9.16.48-0ubuntu0.20.04.1) @ focal	2026-05-24	ubuntu
redhat	bind-dyndb-ldap-0:11.9-9.el9_4	2024-04-30	redhat
redhat	bind-dyndb-ldap-0:11.9-8.el9_2.2	2024-04-15	redhat
redhat	bind-dyndb-ldap-0:11.9-7.el9_0.1	2024-04-15	redhat
redhat	bind-dyndb-ldap-0:11.9-8.el9_3.3	2024-04-11	redhat
redhat	bind9.16-32:9.16.23-0.16.el8_9.2	2024-04-11	redhat
redhat	bind9.16-32:9.16.23-0.14.el8_8.4	2024-04-02	redhat
redhat	bind9.16-32:9.16.23-0.7.el8_6.5	2024-04-02	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-617

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 08:42 UTCEG score recompute
2026-05-24 08:42 UTCVendor advisory
2026-05-24 08:42 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2023-5517?

CVE-2023-5517 is a high vulnerability published on February 13, 2024. 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…

When was CVE-2023-5517 disclosed?

CVE-2023-5517 was first published in the National Vulnerability Database on February 13, 2024, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-5517 actively exploited?

CVE-2023-5517 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-5517?

CVE-2023-5517 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-5517?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-5517, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-5517

Published

Last Modified

References (14)

Vendor Advisories for CVE-2023-5517(7)

Patch Availability(9)

Weakness Classification(1)

Additional Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-5517?

Same vendor

Same CWE

CVE-2023-5517

📅 Published

🔄 Last Modified

🔗 References (14)

📣 Vendor Advisories for CVE-2023-5517(7)

Patch Availability(9)

Weakness Classification(1)

Additional Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-5517?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (14)

Vendor Advisories for CVE-2023-5517(7)

Frequently asked(5)

Related CVEs(same vendor + same CWE)