No exploitation reported

CVE-2023-5517

No exploitation reported by the sources we read.

Published2024-02-13
WeaknessCWE-617

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2024-02-1314:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-5517?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-5517?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · CISA-ADP

Isc bind

Branch	Affected	Fixed in	Source
9.x	≥ 9.12.0, ≤ 9.16.45	no fix published	NVD
9.18	≥ 9.18.0, ≤ 9.18.21	no fix published	NVD
9.19	≥ 9.19.0, ≤ 9.19.19	no fix published	NVD
9.16	= 9.16.8	no fix published	NVD
9.16	= 9.16.11	no fix published	NVD
9.16	= 9.16.12	no fix published	NVD
9.16	= 9.16.13	no fix published	NVD
9.16	= 9.16.14	no fix published	NVD
9.16	= 9.16.21	no fix published	NVD
9.16	= 9.16.32	no fix published	NVD
9.16	= 9.16.36	no fix published	NVD
9.16	= 9.16.43	no fix published	NVD

Isc bind 9

Branch	Affected	Fixed in	Source
9.x	≥ 9.12.0, ≤ 9.16.45	no fix published	CISA-ADP
9.18	≥ 9.18.0, ≤ 9.18.21	no fix published	CISA-ADP
9.19	≥ 9.19.0, ≤ 9.19.19	no fix published	CISA-ADP
9.16	≥ 9.16.8-S1, ≤ 9.16.45-S1	no fix published	CISA-ADP
9.18	≥ 9.18.11-S1, ≤ 9.18.21-S1	no fix published	CISA-ADP

Fedoraproject fedora

Branch	Affected	Fixed in	Source
38.x	= 38	no fix published	NVD
39.x	= 39	no fix published	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

bindAlmaLinux:9all versions · fixed in 32:9.16.23-14.el9_3.4and 9 other packages
bindAlmaLinux:9all versions · fixed in 32:9.16.23-18.el9_4.1and 9 other packages
bind-dyndb-ldapAlmaLinux:9all versions · fixed in 11.9-8.el9_3.3.alma.1
bind-dyndb-ldapAlmaLinux:9all versions · fixed in 11.9-9.el9_4.alma.1
bind9.16AlmaLinux:8all versions · fixed in 32:9.16.23-0.16.el8_9.2.alma.1and 8 other packages

Full record on NVD

Fix

Advisories and patches

kb.isc.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-08-22
OpenCVESSVC decisionnone—
CNACVSS 3.17.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-6172024-08-22
NVDweakness (CWE)CWE-617read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2024-02-13
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-5517?

Is CVE-2023-5517 actively exploited?

Active exploitation of CVE-2023-5517 has not been confirmed. Its EPSS score was 1.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

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

CVE-2023-5517 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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