CVE-2017-15091 Missing authorization in PowerDNS Authoritative
Attackers with valid credentials can perform state-changing operations like cache flushing despite read-only API configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-15091?
CVE-2017-15091 is a high-severity missing authorization vulnerability in PowerDNS Authoritative, published on 23 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue has been found in the API component of PowerDNS Authoritative 4.x up to and including 4.0.4 and 3.x up to and including 3.4.11, where some operations that have an impact on the state of the server are still allowed even though the API has been configured as read-only via the api-readonly keyword. This missing check allows an attacker with valid API credentials to flush the cache, trigger a zone transfer or send a NOTIFY.
Which versions are affected by CVE-2017-15091?
It affects 1 product.
Products include Powerdns Authoritative.
How do I fix CVE-2017-15091?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2017-15091 being exploited?
There is no known exploitation of CVE-2017-15091 in the wild and no public exploit code.
Other vulnerabilities in PowerDNS Authoritative
Sources
Also known as DEBIAN-CVE-2017-15091, GHSA-c29m-p6xf-ppgw, UBUNTU-CVE-2017-15091.