CVE-2022-40188
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Nic Knot Resolver
PublishedSep 23, 2022
First seenSep 23, 2022
Weakness typeCWE-407CWE-407
How to fix
Update
- nic knot_resolver5.5.3 or later
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2VE5K3VDUHJOIA2IGT3G5R76IBADMNE/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIMDNIUI7GTUEKIBBYYW7OCTJQFPDNXL/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XO6LIVQS62MI5GG4OVYB5RHVZMYNHAHG/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nic knot_resolver | v < 5.5.3 | 5.5.3 |
| fedoraproject fedora | 35, 36, 37 | — |
| debian debian_linux | 10.0 | — |
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