{"id":"CVE-2012-5370","aliases":["GHSA-fmmq-j7pq-f85c"],"url":"https://o3.security/vulnerability/CVE-2012-5370","summary":"JRuby denial of service via Hash Collision","details":"JRuby 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 the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4838.","published":"2012-11-28T13:03:10Z","modified":"2026-04-10T03:43:13.301301Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.jruby:jruby-parent","fixedVersion":"1.7.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2013-0533.html"},{"type":"ADVISORY","url":"http://www.ocert.org/advisories/ocert-2012-001.html"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=880671"},{"type":"WEB","url":"http://2012.appsec-forum.ch/conferences/#c17"},{"type":"WEB","url":"http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf"},{"type":"WEB","url":"https://www.131002.net/data/talks/appsec12_slides.pdf"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-10T03:43:13.301301Z"}}