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.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BUGTRAQ:20080331 Paper by Amit Klein (Trusteer): "PowerDNS Recursor DNS Cache Poisoning [pharming]"
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