CVE-2023-4408

NameCVE-2023-4408
DescriptionThe 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5621-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
bind9 (PTS)bullseye (security), bullseye1:9.16.48-1fixed
bookworm, bookworm (security)1:9.18.24-1fixed
sid, trixie1:9.19.24-185-g392e7199df2-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
bind9sourcebullseye1:9.16.48-1DSA-5621-1
bind9sourcebookworm1:9.18.24-1DSA-5621-1
bind9source(unstable)1:9.19.21-1

Notes

https://kb.isc.org/docs/cve-2023-4408
https://gitlab.isc.org/isc-projects/bind9/-/commit/770bb71ce7d934d2461a719af76bee3803145811 (v9.16.48)
https://gitlab.isc.org/isc-projects/bind9/-/commit/0bbb0065e63c3231b320bd20d1121aed6c4d00d8 (v9.16.48)
https://gitlab.isc.org/isc-projects/bind9/-/commit/f397ff5bb81413004fa6367f63a833fe70a3ac59 (v9.16.48)

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