CVE-2016-5427 Denial of service in n/a
Remote attackers can cause denial of service via CPU exhaustion in PowerDNS Authoritative Server by sending crafted DNS queries with dots in labels.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-5427?
CVE-2016-5427 is a high-severity denial of service vulnerability in n/a, published on 21 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.
Weakness: CWE-399
Which versions are affected by CVE-2016-5427?
It affects 1 product.
Products include Powerdns Authoritative.
How do I fix CVE-2016-5427?
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-2016-5427 being exploited?
There is no known exploitation of CVE-2016-5427 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2016-5427, GHSA-8c2c-pfjh-2jc2.