CVEs-PoC/2008/CVE-2008-1637.md

### [CVE-2008-1637](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1637)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

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.

### POC

#### Reference
- http://www.trusteer.com/docs/PowerDNS_recursor_DNS_Cache_Poisoning.pdf
- http://www.trusteer.com/docs/powerdnsrecursor.html

#### Github
- https://github.com/thomasbiege/Publications