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.
| Software | From | Fixed in |
|---|---|---|
| debian / debian_linux | 7.0 | 7.0.x |
| powerdns / recursor | - | 3.6.1.x |