CVE-2023-4408
Published: 13 February 2024
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 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
bind9 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Released
(1:9.16.48-0ubuntu0.20.04.1)
|
|
| jammy |
Released
(1:9.18.18-0ubuntu0.22.04.2)
|
|
| mantic |
Released
(1:9.18.18-0ubuntu2.1)
|
|
| trusty |
Needs triage
|
|
| upstream |
Released
(9.16.48,9.18.24,9.19.21)
|
|
| xenial |
Ignored
(changes too intrusive)
|
|
|
Patches: upstream: https://gitlab.isc.org/isc-projects/bind9/-/commit/770bb71ce7d934d2461a719af76bee3803145811 upstream: https://gitlab.isc.org/isc-projects/bind9/-/commit/0bbb0065e63c3231b320bd20d1121aed6c4d00d8 upstream: https://gitlab.isc.org/isc-projects/bind9/-/commit/f397ff5bb81413004fa6367f63a833fe70a3ac59 |
||
|
bind9-libs Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Needs triage
|
|
| jammy |
Needs triage
|
|
| mantic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
isc-dhcp Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Not vulnerable
(code not present)
|
|
| jammy |
Not vulnerable
(code not present)
|
|
| mantic |
Needs triage
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not present)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |