A certain pseudo-random number generator (PRNG) algorithm that uses XOR and 3-bit random hops (aka "Algorithm X3"), as used in OpenBSD 2.8…

Description

A certain pseudo-random number generator (PRNG) algorithm that uses XOR and 3-bit random hops (aka "Algorithm X3"), as used in OpenBSD 2.8 through 4.2, allows remote attackers to guess sensitive values such as DNS transaction IDs by observing a sequence of previously generated values. NOTE: this issue can be leveraged for attacks such as DNS cache poisoning against OpenBSD's modification of BIND.

Scores

EPSS (exploitation in 30 days)

1.4% · top 28% 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

Affected products

• n/a

  • affected n/a

References (6)

• 20080206 A paper by Amit Klein (Trusteer): "OpenBSD DNS Cache Poisoning and Multiple O/S Predictable IP ID Vulnerability" (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 28819 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://www.trusteer.com/docs/OpenBSD_DNS_Cache_Poisoning_and_Multiple_OS_Predictable_IP_ID_Vulnerability.pdf (opens in a new tab)x_refsource_MISCx_transferred
• http://www.securiteam.com/securityreviews/5PP0H0UNGW.html (opens in a new tab)x_refsource_MISCx_transferred
• openbsd-prng-dns-spoofing(40329) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• 27647 (opens in a new tab)vdb-entryx_refsource_BIDx_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-2008-1146](https://trackcve.app/badge/CVE-2008-1146.svg)](https://trackcve.app/cve/CVE-2008-1146)

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