CVE-2008-1637

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2008-04-02 · updated 2026-06-16
Weakness: CWE-189

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.

Affected products

PowerDNS Recursor: through 3.1.4

References

http://doc.powerdns.com/changelog.html
http://doc.powerdns.com/powerdns-advisory-2008-01.html
http://lists.opensuse.org/opensuse-security-announce/2008-06/msg00001.html
http://secunia.com/advisories/29584
http://secunia.com/advisories/29737
http://secunia.com/advisories/29764
http://secunia.com/advisories/29830
http://secunia.com/advisories/30581
http://security.gentoo.org/glsa/glsa-200804-22.xml
http://www.debian.org/security/2008/dsa-1544
http://www.securityfocus.com/archive/1/490330/100/0/threaded
http://www.securityfocus.com/bid/28517

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