CVE-2023-4236

HIGH

BIND 9 <9.18.18-9.18.18.S1 - Use After Free

Title source: llm

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.

References (7)

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2023/09/20/2

[Vendor Advisory] https://kb.isc.org/docs/cve-2023-4236

[Mailing List] https://lists.fedoraproject.org/archives/list/[email protected]/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/

[Mailing List] https://lists.fedoraproject.org/archives/list/[email protected]/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/[email protected]/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/

[Third Party Advisory] https://security.netapp.com/advisory/ntap-20231013-0004/

[Third Party Advisory] https://www.debian.org/security/2023/dsa-5504

Scores

CVSS v3 7.5

EPSS 0.0018

EPSS Percentile 38.9%

Attack Vector NETWORK

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

Classification

CWE

CWE-617

Status published

Affected Products (13)

isc/bind < 9.18.18

isc/bind

isc/bind

fedoraproject/fedora

fedoraproject/fedora

fedoraproject/fedora

debian/debian_linux

debian/debian_linux

netapp/h300s_firmware

netapp/h500s_firmware

netapp/h700s_firmware

netapp/h410s_firmware

netapp/h410c_firmware

Timeline

Published Sep 20, 2023

Tracked Since Feb 18, 2026