{"cve":"CVE-2012-5371","nvd":{"published":"2012-11-28T13:03:10.153","modified":"2026-06-16T23:46:44.907","status":"Modified","description":"Ruby (aka CRuby) 1.9 before 1.9.3-p327 and 2.0 before r37575 computes hash values without properly restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table, as demonstrated by a universal multicollision attack against a variant of the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4815.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-310"],"references":["http://2012.appsec-forum.ch/conferences/#c17","http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf","http://secunia.com/advisories/51253","http://securitytracker.com/id?1027747","http://www.ocert.org/advisories/ocert-2012-001.html"],"products":["ruby-lang:ruby"],"source":"nvd","synced_at":"2026-10-19T20:27:27.940201468+00:00"},"epss":{"cve":"CVE-2012-5371","score":0.0333,"percentile":0.8862,"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."]}