| Name | CVE-2023-4408 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5621-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| bind9 (PTS) | bullseye | 1:9.16.50-1~deb11u2 | fixed |
| bullseye (security) | 1:9.16.50-1~deb11u1 | fixed | |
| bookworm, bookworm (security) | 1:9.18.28-1~deb12u2 | fixed | |
| sid, trixie | 1:9.20.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| bind9 | source | bullseye | 1:9.16.48-1 | DSA-5621-1 | ||
| bind9 | source | bookworm | 1:9.18.24-1 | DSA-5621-1 | ||
| bind9 | source | (unstable) | 1:9.19.21-1 |
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)