{"cve":"CVE-2006-6931","nvd":{"published":"2007-01-16T23:28:00.000","modified":"2026-06-16T22:34:04.350","status":"Modified","description":"Algorithmic complexity vulnerability in Snort before 2.6.1, during predicate evaluation in rule matching for certain rules, allows remote attackers to cause a denial of service (CPU consumption and detection outage) via crafted network traffic, aka a \"backtracking attack.\"","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://lists.immunitysec.com/pipermail/dailydave/2007-January/003954.html","http://secunia.com/advisories/23716","http://secunia.com/advisories/24164","http://secunia.com/advisories/24338","http://security.gentoo.org/glsa/glsa-200702-03.xml"],"products":["snort:snort"],"source":"nvd","synced_at":"2026-10-19T19:44:49.019236172+00:00"},"epss":{"cve":"CVE-2006-6931","score":0.02449,"percentile":0.84371,"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."]}