CVE-2008-1637
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.
Key facts
- CVSS score
- 6.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-189
- EPSS score
- 4.0% (90th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2008-1638)
- Published
- April 2, 2008
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2008-1638 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- powerdns / recursor
References
- http://doc.powerdns.com/changelog.html
- http://doc.powerdns.com/powerdns-advisory-2008-01.html(Exploit, Patch)
- http://lists.opensuse.org/opensuse-security-announce/2008-06/msg00001.html
- http://secunia.com/advisories/29584(Exploit, Vendor Advisory)
- 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
- http://www.trusteer.com/docs/PowerDNS_recursor_DNS_Cache_Poisoning.pdf(Exploit)
- http://www.trusteer.com/docs/powerdnsrecursor.html(Exploit)
- http://www.vupen.com/english/advisories/2008/1046/references
- https://exchange.xforce.ibmcloud.com/vulnerabilities/41534
- https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00198.html
- https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00224.html
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain