{"schemaVersion":3,"id":"CVE-2009-0642","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"ext/openssl/ossl_ocsp.c in Ruby 1.8 and 1.9 does not properly check the return value from the OCSP_basic_verify function, which might allow remote attackers to successfully present an invalid X.509 certificate, possibly involving a revoked certificate.","dates":{"published":"2009-02-18T17:00:00.000Z","modified":"2024-08-07T04:40:05.106Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.8,"severity":"medium","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","computed":false,"selection":"backend-summary"},"metrics":[{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":6.8,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0264,"percentile":0.85447,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.0264},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0264,"percentile":0.85447}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0264,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0264,"percentile":0.85447}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_DE0C529349A9FE7C","name":"Exploit Reference (redmine.ruby-lang.org)","source":"reference","url":"http://redmine.ruby-lang.org/issues/show/1091","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-287","name":"Improper Authentication","description":"When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/287.html"}],"affected":[{"vendor":"ruby-lang","product":"ruby","name":"ruby","label":"ruby","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"1.8","noFixRecorded":false,"fixedIn":null},{"text":"1.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"1.8 | 1.9","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"ruby","label":"Ruby","category":"lang"}},"hubHref":"/vendor/ruby-lang/ruby"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://secunia.com/advisories/35937","label":"secunia.com/advisories/35937","hostname":"secunia.com","tags":["Third Party Advisory","X Refsource SECUNIA"]},{"url":"http://redmine.ruby-lang.org/issues/show/1091","label":"redmine.ruby-lang.org/issues/show/1091","hostname":"redmine.ruby-lang.org","tags":["X Refsource CONFIRM","Exploit"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/48761","label":"exchange.xforce.ibmcloud.com/vulnerabilities/48761","hostname":"exchange.xforce.ibmcloud.com","tags":["VDB Entry","X Refsource XF"]},{"url":"http://www.redhat.com/support/errata/RHSA-2009-1140.html","label":"www.redhat.com/support/errata/RHSA-2009-1140.html","hostname":"www.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"http://www.ubuntu.com/usn/USN-805-1","label":"www.ubuntu.com/usn/USN-805-1","hostname":"www.ubuntu.com","tags":["Vendor Advisory","X Refsource UBUNTU"]},{"url":"http://www.securityfocus.com/bid/33769","label":"www.securityfocus.com/bid/33769","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID"]},{"url":"http://www.securitytracker.com/id?1022505","label":"www.securitytracker.com/id?1022505","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11450","label":"oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11450","hostname":"oval.cisecurity.org","tags":["VDB Entry","Signature","X Refsource OVAL"]},{"url":"http://secunia.com/advisories/35699","label":"secunia.com/advisories/35699","hostname":"secunia.com","tags":["Third Party Advisory","X Refsource SECUNIA"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:193","label":"www.mandriva.com/security/advisories?name=MDVSA-2009:193","hostname":"www.mandriva.com","tags":["Vendor Advisory","X Refsource MANDRIVA"]},{"url":"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513528","label":"bugs.debian.org/cgi-bin/bugreport.cgi?bug=513528","hostname":"bugs.debian.org","tags":["X Refsource MISC"]},{"url":"http://secunia.com/advisories/33750","label":"secunia.com/advisories/33750","hostname":"secunia.com","tags":["Third Party Advisory","X Refsource SECUNIA"]}],"lineage":{"upstream":[],"downstream":["DSA-1860-1","RHSA-2009:1140"],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2009-02-18T17:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-07T04:40:05.106Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":38,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T20:54:22.668Z","stale":false,"partial":false}}