HOME VULNERABILITIESCVE-2023-5517

HIGH

CVE-2023-5517

CWE-617Published: February 13, 2024· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official 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.

Technical Analysis

CVE-2023-5517 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

Fedora1 product(s)

fedora

isc1 product(s)

bind

netapp1 product(s)

active iq unified manager

Source: NVD CPE · 17 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.openwall.com/lists/oss-security/2024/02/13/1

ADVISORYhttps://kb.isc.org/docs/cve-2023-5517

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/

ADVISORYhttps://security.netapp.com/advisory/ntap-20240503-0006/

ADVISORYhttp://www.openwall.com/lists/oss-security/2024/02/13/1

ADVISORYhttps://kb.isc.org/docs/cve-2023-5517

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/

ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/

ADVISORYhttps://security.netapp.com/advisory/ntap-20240503-0006/

All References (14)

→

http://www.openwall.com/lists/oss-security/2024/02/13/1Mailing List · Third Party Advisory

→

https://kb.isc.org/docs/cve-2023-5517Vendor Advisory

→

https://lists.fedoraproject.org/archives/list/[email protected]/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/Mailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/Mailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/[email protected]/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/Mailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/Mailing List · Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20240503-0006/Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2024/02/13/1Mailing List · Third Party Advisory

→

https://kb.isc.org/docs/cve-2023-5517Vendor Advisory

→

https://lists.fedoraproject.org/archives/list/[email protected]/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/Mailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/Mailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/[email protected]/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/Mailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/Mailing List · Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20240503-0006/Third Party Advisory

Quick Facts

CVE IDCVE-2023-5517

CVSS Score7.5 / 10

SeverityHIGH

WeaknessCWE-617

CISA KEVNo

Affected3 vendor(s)

PublishedFeb 13, 2024

Related CVEs (CWE-617)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2023-5517 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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