CVE-2022-40188
Published: 23 September 2022
Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address sets.
Priority
Status
Package | Release | Status |
---|---|---|
knot-resolver Launchpad, Ubuntu, Debian |
kinetic |
Released
(5.5.1-5ubuntu0.22.10.1)
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Released
(5.5.3-1)
|
|
bionic |
Released
(2.1.1-1ubuntu0.1~esm2)
Available with Ubuntu Pro |
|
focal |
Released
(3.2.1-3ubuntu2.1)
|
|
jammy |
Released
(5.4.4-1ubuntu0.1~esm1)
Available with Ubuntu Pro |
|
xenial |
Released
(1.0.0~beta3-1ubuntu0.1~esm1)
Available with Ubuntu Pro |
|
lunar |
Not vulnerable
(5.6.0-1)
|
|
Patches: upstream: https://github.com/CZ-NIC/knot-resolver/commit/f6577a20e493c7fbdac124d7544bf1846b084185 |
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 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40188
- https://github.com/CZ-NIC/knot-resolver/commit/f6577a20e493c7fbdac124d7544bf1846b084185 (v5.5.3)
- https://www.knot-resolver.cz/2022-09-21-knot-resolver-5.5.3.html
- https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1343#note_262558
- https://ubuntu.com/security/notices/USN-6225-1
- NVD
- Launchpad
- Debian