Is CVE-2023-4236 actively exploited?

CVE-2023-4236 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2023-4236?

CVE-2023-4236 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2023-4236?

Patch guidance is available from isc security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-4236.

Fix CVE-2023-4236 - HIGH isc bind

Q: Which products are affected by CVE-2023-4236?

13 products: isc bind, isc bind, isc bind, fedoraproject fedora, fedoraproject fedora, and 8 more.

Description

A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-617

Metadata

Primary Vendor: ISC
Published: 9/20/2023
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

isc : bindisc : bindisc : bindfedoraproject : fedorafedoraproject : fedorafedoraproject : fedoradebian : debian_linuxdebian : debian_linuxnetapp : h300s_firmwarenetapp : h500s_firmwarenetapp : h700s_firmwarenetapp : h410s_firmwarenetapp : h410c_firmware

Remediation Guidance

Executive Summary

View on NIST NVD