CVE-2023-4408

2024-02-1300:00:00

ubuntu.com

dns message parsing

computational complexity

excessive cpu load

bind 9

authoritative servers

recursive resolvers

7.5 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

41.8%

JSON

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.

Notes

Author	Note
alexmurray	As of isc-dhcp-4.4.3-1, isc-dhcp vendors bind9 libs
mdeslaur	This is unlikely to affect isc-dhcp’s use of bind9-libs and the vendored bind9 libs, marking as negligible

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchbind9< anyUNKNOWN
ubuntu20.04noarchbind9< 1:9.16.48-0ubuntu0.20.04.1UNKNOWN
ubuntu22.04noarchbind9< 1:9.18.18-0ubuntu0.22.04.2UNKNOWN
ubuntu23.10noarchbind9< 1:9.18.18-0ubuntu2.1UNKNOWN
ubuntu24.04noarchbind9< anyUNKNOWN
ubuntu14.04noarchbind9< anyUNKNOWN
ubuntu20.04noarchbind9-libs< anyUNKNOWN
ubuntu22.04noarchbind9-libs< anyUNKNOWN
ubuntu18.04noarchisc-dhcp< anyUNKNOWN
ubuntu23.10noarchisc-dhcp< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	bind9	< any	UNKNOWN
ubuntu	20.04	noarch	bind9	< 1:9.16.48-0ubuntu0.20.04.1	UNKNOWN
ubuntu	22.04	noarch	bind9	< 1:9.18.18-0ubuntu0.22.04.2	UNKNOWN
ubuntu	23.10	noarch	bind9	< 1:9.18.18-0ubuntu2.1	UNKNOWN
ubuntu	24.04	noarch	bind9	< any	UNKNOWN
ubuntu	14.04	noarch	bind9	< any	UNKNOWN
ubuntu	20.04	noarch	bind9-libs	< any	UNKNOWN
ubuntu	22.04	noarch	bind9-libs	< any	UNKNOWN
ubuntu	18.04	noarch	isc-dhcp	< any	UNKNOWN
ubuntu	23.10	noarch	isc-dhcp	< any	UNKNOWN