{"schemaVersion":3,"id":"CVE-2012-0055","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.","dates":{"published":"2020-02-19T17:28:53.000Z","modified":"2024-08-06T18:09:17.246Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/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":7.2,"severity":"high","vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01241,"percentile":0.68772,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.01241},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01241,"percentile":0.68772}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01241,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01241,"percentile":0.68772}]},"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_B5F1A0C573656A93","name":"Exploit Reference (openwall.com)","source":"reference","url":"http://www.openwall.com/lists/oss-security/2012/01/17/11","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_BE61AA8203889D8A","name":"Exploit Reference (bugs.launchpad.net)","source":"reference","url":"https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"36571","name":"OverlayFS inode Security Checks - 'inode.c' Local Security Bypass","source":"exploit-database","url":"https://www.exploit-db.com/exploits/36571","maturity":"weaponized","reliabilityScore":0.8,"verified":true,"type":"local","platforms":["linux"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"local","platform":"linux","file":"exploits/linux/local/36571.sh","codes":["CVE-2012-0055","OSVDB-79247"]},"metasploit":null}],"exploitCount":3,"weaknesses":[{"id":"CWE-862","name":"Missing Authorization","description":"The product does not perform an authorization check when an actor attempts to access a resource or perform an action.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/862.html"}],"affected":[{"vendor":"canonical","product":"ubuntu_linux","name":"ubuntu linux","label":"ubuntu_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"10.04","noFixRecorded":false,"fixedIn":null},{"text":"11.10","noFixRecorded":false,"fixedIn":null}],"versionsText":"10.04 | 11.10","eol":{"isEol":true,"eolDate":"2013-05-09T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"10.04","label":"10.04 'Lucid Lynx' (LTS)","eolFrom":"2013-05-09T00:00:00.000Z","isLts":true,"isMaintained":false,"latestVersion":"10.04.4"},"product":{"name":"ubuntu","label":"Ubuntu","category":"os"}},"hubHref":"/vendor/canonical/ubuntu_linux"},{"vendor":"linux kernel","product":"overlayfs","name":"OverlayFS","label":"overlayfs","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.0.0-16.28","noFixRecorded":false,"fixedIn":null},{"text":"as used in Ubuntu 10.0.4 LTS and 11.10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.0.0-16.28 | as used in Ubuntu 10.0.4 LTS and 11.10","eol":null,"hubHref":"/vendor/linux_kernel/overlayfs"},{"vendor":"linux","product":"linux_kernel","name":"linux kernel","label":"linux_kernel","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 3.0.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.0.0","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"linux","label":"Linux Kernel","category":"os"}},"hubHref":"/vendor/linux/linux_kernel"}],"affectedCount":3,"eol":{"hasEol":true,"count":1},"references":[{"url":"http://www.openwall.com/lists/oss-security/2012/01/17/11","label":"www.openwall.com/lists/oss-security/2012/01/17/11","hostname":"www.openwall.com","tags":["Mailing List","X Refsource MLIST","Exploit","Patch","Third Party Advisory"]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055","label":"bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055","hostname":"bugzilla.suse.com","tags":["X Refsource MISC","Issue Tracking","Third Party Advisory"]},{"url":"https://access.redhat.com/security/cve/cve-2012-0055","label":"access.redhat.com/security/cve/cve-2012-0055","hostname":"access.redhat.com","tags":["X Refsource MISC","Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1363-1","label":"www.ubuntu.com/usn/USN-1363-1","hostname":"www.ubuntu.com","tags":["X Refsource CONFIRM","Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1364-1","label":"www.ubuntu.com/usn/USN-1364-1","hostname":"www.ubuntu.com","tags":["X Refsource CONFIRM","Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1384-1","label":"www.ubuntu.com/usn/USN-1384-1","hostname":"www.ubuntu.com","tags":["X Refsource CONFIRM","Third Party Advisory"]},{"url":"https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941","label":"bugs.launchpad.net/ubuntu/+source/linux/+bug/915941","hostname":"bugs.launchpad.net","tags":["X Refsource CONFIRM","Exploit","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-02-19T17:28:53.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-06T18:09:17.246Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":41,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T08:12:07.499Z","stale":false,"partial":false}}