CVE-2023-22617 Denial of service in n/a
A remote attacker can cause a denial of service in PowerDNS Recursor via infinite recursion triggered by specific DNS queries.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-22617?
CVE-2023-22617 is a high-severity denial of service vulnerability in Powerdns Recursor, published on 21 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A remote attacker might be able to cause infinite recursion in PowerDNS Recursor 4.8.0 via a DNS query that retrieves DS records for a misconfigured domain, because QName minimization is used in QM fallback mode. This is fixed in 4.8.1.
Weakness: CWE-674
Which versions are affected by CVE-2023-22617?
It affects 1 product.
Linux distribution packages (1)
pdns-recursor openSUSE:Tumbleweed | All versions | 4.8.1-1.1 |
Products include Powerdns Recursor.
How do I fix CVE-2023-22617?
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-2023-22617 being exploited?
There is no known exploitation of CVE-2023-22617 in the wild and no public exploit code.
Other vulnerabilities in Powerdns Recursor
- CVE-2009-4009 Memory corruption in n/a
- CVE-2020-10030 Memory corruption in n/a
- CVE-2025-59023 Crafted delegations or IP fragments can poison cached delegations in Recursor
- CVE-2025-59030 Insufficient validation of incoming notifies over TCP can lead to a denial of service in Recursor
- CVE-2018-16855 Memory corruption in pdns-recursor
Sources
Also known as DEBIAN-CVE-2023-22617, GHSA-59qw-42jc-ww5f, UBUNTU-CVE-2023-22617, openSUSE-SU-2024:12628-1.