PowerDNS Recursor before 3.6.2 does not limit delegation chaining, which allows remote attackers to cause a denial of service ("performance degradations") via a large or infinite number of referrals, as demonstrated by resolving domains hosted by ezdns.it.
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "3.5.3-1ubuntu0.1", "binary_name": "pdns-recursor" }, { "binary_version": "3.5.3-1ubuntu0.1", "binary_name": "pdns-recursor-dbg" }, { "binary_version": "3.5.3-1ubuntu0.1", "binary_name": "pdns-recursor-dbgsym" } ] }