CVE-2015-5470 Denial of service in n/a
Remote attackers can cause denial of service via CPU consumption or crash in PowerDNS Recursor and Authoritative Server through crafted DNS requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-5470?
CVE-2015-5470 is a high-severity denial of service vulnerability in Powerdns Recursor, published on 2 Nov 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The label decompression functionality in PowerDNS Recursor before 3.6.4 and 3.7.x before 3.7.3 and Authoritative (Auth) Server before 3.3.3 and 3.4.x before 3.4.5 allows remote attackers to cause a denial of service (CPU consumption or crash) via a request with a long name that refers to itself. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1868.
Weakness: CWE-399
Which versions are affected by CVE-2015-5470?
It affects 2 products.
Products include Powerdns Authoritative, Powerdns Recursor.
How do I fix CVE-2015-5470?
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-2015-5470 being exploited?
There is no known exploitation of CVE-2015-5470 in the wild and no public exploit code.
Other vulnerabilities in Powerdns Recursor
Sources
Also known as DEBIAN-CVE-2015-5470, DSA-3306-1, DSA-3307-1, GHSA-vh8j-jj36-28wq, UBUNTU-CVE-2015-5470.