{"cve":"CVE-2008-1147","nvd":{"published":"2008-03-04T23:44:00.000","modified":"2026-06-16T22:51:05.400","status":"Modified","description":"A certain pseudo-random number generator (PRNG) algorithm that uses XOR and 2-bit random hops (aka \"Algorithm X2\"), as used in OpenBSD 2.6 through 3.4, Mac OS X 10 through 10.5.1, FreeBSD 4.4 through 7.0, and DragonFlyBSD 1.0 through 1.10.1, allows remote attackers to guess sensitive values such as IP fragmentation IDs by observing a sequence of previously generated values.  NOTE: this issue can be leveraged for attacks such as injection into TCP packets and OS fingerprinting.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://seclists.org/bugtraq/2008/Feb/0052.html","http://seclists.org/bugtraq/2008/Feb/0063.html","http://secunia.com/advisories/28819","http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/ip_id.c?rev=1.10%3Bcontenttype=","http://www.securiteam.com/securityreviews/5PP0H0UNGW.html"],"products":["cosmicperl:directory_pro","darwin:darwin","navision:financials_server"],"source":"nvd","synced_at":"2026-10-19T19:49:50.107194424+00:00"},"epss":{"cve":"CVE-2008-1147","score":0.01772,"percentile":0.78153,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}