PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Recursor | Powerdns | * | 3.1.4 (including) |
| Pdns-recursor | Ubuntu | devel | * |
| Pdns-recursor | Ubuntu | edgy | * |
| Pdns-recursor | Ubuntu | feisty | * |
| Pdns-recursor | Ubuntu | gutsy | * |
| Pdns-recursor | Ubuntu | hardy | * |
| Pdns-recursor | Ubuntu | intrepid | * |