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CVE-2008-1637

6.8 · MEDIUM

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…

Published Apr 2, 2008powerdnsCWE-189EPSS 3.96%

Overview

CVE-2008-1637 is a medium-severity vulnerability affecting powerdns recursor. It was published on April 2, 2008 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from powerdns. Update recursor to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
powerdnsrecursor0Affected

References

Refdoc.powerdns.com/changelog.htmlRefdoc.powerdns.com/powerdns-advisory-2008-01.htmlReflists.opensuse.org/opensuse-security-announce/2008-06/msg00001.htmlRefsecunia.com/advisories/29584Refsecunia.com/advisories/29737Refsecunia.com/advisories/29764Refsecunia.com/advisories/29830Refsecunia.com/advisories/30581Refsecurity.gentoo.org/glsa/glsa-200804-22.xmlRefwww.debian.org/security/2008/dsa-1544

How CyberStrike helps

Frequently asked questions

What is CVE-2008-1637?

CVE-2008-1637 is a medium-severity vulnerability affecting powerdns recursor. It was published on April 2, 2008 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

How severe is CVE-2008-1637?

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2008-1637?

Check the references section for vendor advisories and patches from powerdns. Update recursor to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2008-1637?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2008-1637 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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