{"schemaVersion":3,"id":"CVE-2017-12942","aliases":["UBUNTU-CVE-2017-12942","DEBIAN-CVE-2017-12942"],"status":"published","duplicateOf":null,"title":null,"description":"libunrar.a in UnRAR before 5.5.7 has a buffer overflow in the Unpack::LongLZ function.","dates":{"published":"2017-08-18T14:00:00.000Z","modified":"2024-08-05T18:51:07.386Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.5,"severity":"high","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":9.8,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Debian","score":9.8,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true}]},"epss":{"probability":0.02304,"percentile":0.83052,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.02304},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.02368,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.02368,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02077,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02304,"percentile":0.83052}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02077,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02304,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02304,"percentile":0.83052}]},"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_62F8F2FF739A2172","name":"Exploit Reference (seclists.org)","source":"reference","url":"http://seclists.org/oss-sec/2017/q3/290","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer","description":"The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/119.html"}],"affected":[{"vendor":"debian","product":"unrar-nonfree","name":"unrar-nonfree","label":"unrar-nonfree","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/unrar-nonfree","purlType":"deb","versions":[{"text":"< 1:5.5.8-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:5.5.8-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"unrar-nonfree","name":"unrar-nonfree","label":"unrar-nonfree","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/unrar-nonfree","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"rarlab","product":"unrar","name":"UnRAR","label":"unrar","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 5.5.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 5.5.6","eol":null,"hubHref":"/vendor/rarlab/unrar"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://seclists.org/oss-sec/2017/q3/290","label":"seclists.org/oss-sec/2017/q3/290","hostname":"seclists.org","tags":["X Refsource MISC","Exploit","Mailing List","Third Party Advisory","REPORT"]},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10241","label":"kc.mcafee.com/corporate/index?page=content&id=SB10241","hostname":"kc.mcafee.com","tags":["X Refsource CONFIRM"]},{"url":"https://security.gentoo.org/glsa/201709-24","label":"security.gentoo.org/glsa/201709-24","hostname":"security.gentoo.org","tags":["Vendor Advisory","X Refsource GENTOO"]},{"url":"https://ubuntu.com/security/CVE-2017-12942","label":"ubuntu.com/security/CVE-2017-12942","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"http://www.openwall.com/lists/oss-security/2017/08/18/6","label":"www.openwall.com/lists/oss-security/2017/08/18/6","hostname":"www.openwall.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-12942","label":"www.cve.org/CVERecord?id=CVE-2017-12942","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-12942","label":"security-tracker.debian.org/tracker/CVE-2017-12942","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2017-0302","MGASA-2017-0304","SUSE-SU-2018:0862-1","SUSE-SU-2021:2834-1"],"duplicates":[],"related":["SUSE-SU-2018:0862-1","SUSE-SU-2021:2834-1"]},"timeline":[{"kind":"published","date":"2017-08-18T14:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T18:51:07.386Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T10:51:13.059Z","stale":false,"partial":false}}