An issue has been found in PowerDNS Authoritative Server when the HTTP remote backend is used in RESTful mode , allowing a remote user to cause the HTTP backend to connect to an attacker-specified host instead of the configured one, via a crafted DNS query. This can be used to cause a denial of service by preventing the remote backend from getting a response, content spoofing if the attacker can time its own query so that subsequent queries will use an attacker-controlled HTTP server instead of the configured one, and possibly information disclosure if the Authoritative Server has access to internal servers. Affects: PowerDNS Authoritative up to and including 4.1.6 Not affected: 4.1.7, 4.0.7