CVE-2022-40188 Denial of service in n/a
Remote attackers can cause denial of service via CPU consumption in Knot Resolver by exploiting algorithmic complexity with large NS or address sets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-40188?
CVE-2022-40188 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 23 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-407
Which versions are affected by CVE-2022-40188?
It affects 3 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Nic Knot Resolver.
How do I fix CVE-2022-40188?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-40188 being exploited?
There is no known exploitation of CVE-2022-40188 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2022-40188, DLA-3139-1, GHSA-qj7c-f3xj-jxpv, UBUNTU-CVE-2022-40188, USN-6225-1.