PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it…

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.

Scores

EPSS (exploitation in 30 days)

4.0% · top 9.5% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.

Weakness

• n/a
• CWE-189 (opens in a new tab)All about CWE-189 and its CVEs

Affected products

• n/a

  • affected n/a

References (18)

• 29764 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 29737 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• DSA-1544 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• FEDORA-2008-3010 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 28517 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• http://doc.powerdns.com/changelog.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.trusteer.com/docs/powerdnsrecursor.html (opens in a new tab)x_refsource_MISCx_transferred
• 29584 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• SUSE-SR:2008:012 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• ADV-2008-1046 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• http://www.trusteer.com/docs/PowerDNS_recursor_DNS_Cache_Poisoning.pdf (opens in a new tab)x_refsource_MISCx_transferred
• 29830 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://doc.powerdns.com/powerdns-advisory-2008-01.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• powerdns-dnscache-weak-security(41534) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• GLSA-200804-22 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• FEDORA-2008-3036 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 20080331 Paper by Amit Klein (Trusteer): "PowerDNS Recursor DNS Cache Poisoning [pharming]" (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 30581 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2008-1637](https://trackcve.app/badge/CVE-2008-1637.svg)](https://trackcve.app/cve/CVE-2008-1637)

Record last updated 7 Aug 2024, 08:32 UTC.