Cyber Resilience

CVE-2023-5517

High

Published: 13 February 2024

Published
13 February 2024
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0014 34.4th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-5517 is a high-severity Reachable Assertion (CWE-617) vulnerability in Isc Bind. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 34.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-617

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

CVE-2023-5517 allows remote attackers to cause a denial of service by crashing the BIND DNS server (named process) via a crafted PTR query for RFC 1918 addresses when nxdomain-redirect is enabled, exploiting an application vulnerability.

Affected Assets

netapp
active iq unified manager
all versions
fedoraproject
fedora
38, 39
isc
bind
9.16.11, 9.16.12, 9.16.13, 9.16.14, 9.16.21 · 9.12.0 — 9.16.45 · 9.18.0 — 9.18.21 · 9.19.0 — 9.19.19

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References