CVE-2021-36754 Denial of service in n/a
An attacker can crash the PowerDNS Authoritative Server process by sending a specific DNS query, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-36754?
CVE-2021-36754 is a high-severity denial of service vulnerability in n/a, published on 27 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception.
Weakness: CWE-119
Which versions are affected by CVE-2021-36754?
It affects 1 product.
Products include Powerdns Authoritative Server.
How do I fix CVE-2021-36754?
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-2021-36754 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-36754 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in n/a
Sources
Also known as GHSA-g5x7-wx2c-jqff.