CVE-2023-4408

13.02.2024, 14:15

The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers.
This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
isc	CNA	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADP	ADP	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 45%

Vendor	Product	Version
netapp	ontap	9.14.1
netapp	ontap	9.15.1
isc	bind	9.0.0 ≤ 𝑥 ≤ 9.16.45
isc	bind	9.18.0 ≤ 𝑥 ≤ 9.18.21
isc	bind	9.19.0 ≤ 𝑥 ≤ 9.19.19
isc	bind	9.9.3:s1
isc	bind	9.16.8:s1
isc	bind	9.16.11:s1
isc	bind	9.16.12:s1
isc	bind	9.16.13:s1
isc	bind	9.16.14:s1
isc	bind	9.16.21:s1
isc	bind	9.16.32:s1
isc	bind	9.16.36:s1
isc	bind	9.16.43:s1
isc	bind	9.18.0:s1
isc	bind	9.18.11:s1
isc	bind	9.18.18:s1

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

bind9

bullseye	1:9.16.50-1~deb11u2 fixed
bullseye (security)	1:9.16.50-1~deb11u1 fixed
bookworm	1:9.18.28-1~deb12u2 fixed
bookworm (security)	1:9.18.28-1~deb12u2 fixed
trixie	1:9.20.4-3 fixed
sid	1:9.20.4-3 fixed

Ubuntu Releases

Ubuntu Product

Codename

bind9

oracular	Fixed 1:9.18.24-0ubuntu1 released
noble	Fixed 1:9.18.24-0ubuntu1 released
mantic	Fixed 1:9.18.18-0ubuntu2.1 released
jammy	Fixed 1:9.18.18-0ubuntu0.22.04.2 released
focal	Fixed 1:9.16.48-0ubuntu0.20.04.1 released
bionic	needs-triage
xenial	ignored
trusty	ignored