{"schemaVersion":3,"id":"CVE-2015-8313","aliases":["UBUNTU-CVE-2015-8313","DLA-364-1","DSA-3408-1"],"status":"published","duplicateOf":null,"title":null,"description":"GnuTLS incorrectly validates the first byte of padding in CBC modes","dates":{"published":"2019-12-20T13:10:23.000Z","modified":"2024-08-06T08:13:32.090Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.9,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":5.6,"impact":6,"computed":true}]},"epss":{"probability":0.01685,"percentile":0.76632,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.01685},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01685,"percentile":0.76632}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01685,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01685,"percentile":0.76632}]},"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":[],"exploitCount":0,"weaknesses":[{"id":"CWE-203","name":"Observable Discrepancy","description":"The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/203.html"}],"affected":[{"vendor":"debian","product":"gnutls26","name":"gnutls26","label":"gnutls26","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/gnutls26","purlType":"deb","versions":[{"text":"< 2.8.6-1+squeeze6","noFixRecorded":false,"fixedIn":null},{"text":"< 2.12.20-8+deb7u4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.8.6-1+squeeze6 | < 2.12.20-8+deb7u4","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"gnutls26","name":"gnutls26","label":"gnutls26","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/gnutls26","purlType":"deb","versions":[{"text":"< 2.12.23-12ubuntu2.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.12.23-12ubuntu2.3","eol":null,"hubHref":null},{"vendor":"debian","product":"debian_linux","name":"debian linux","label":"debian_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"7.0","noFixRecorded":false,"fixedIn":null},{"text":"8.0","noFixRecorded":false,"fixedIn":null},{"text":"9.0","noFixRecorded":false,"fixedIn":null},{"text":"10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"7.0 | 8.0 | 9.0 | 10.0","eol":{"isEol":true,"eolDate":"2018-05-31T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"7","label":"7 (Wheezy)","eolFrom":"2018-05-31T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":"7.11"},"product":{"name":"debian","label":"Debian","category":"os"}},"hubHref":"/vendor/debian/debian_linux"},{"vendor":"gnu","product":"gnutls","name":"gnutls","label":"gnutls","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 2.0.0, ≤ 2.12.24","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.0.0, ≤ 2.12.24","eol":null,"hubHref":"/vendor/gnu/gnutls"}],"affectedCount":4,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://security-tracker.debian.org/tracker/CVE-2015-8313","label":"security-tracker.debian.org/tracker/CVE-2015-8313","hostname":"security-tracker.debian.org","tags":["X Refsource MISC","Third Party Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-8313","label":"bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-8313","hostname":"bugzilla.redhat.com","tags":["X Refsource MISC","Issue Tracking","Third Party Advisory"]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2015-8313","label":"bugzilla.suse.com/show_bug.cgi?id=CVE-2015-8313","hostname":"bugzilla.suse.com","tags":["X Refsource MISC","Issue Tracking","Patch","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/78327","label":"www.securityfocus.com/bid/78327","hostname":"www.securityfocus.com","tags":["X Refsource MISC","Third Party Advisory","VDB Entry"]},{"url":"http://www.debian.org/security/2015/dsa-3408","label":"www.debian.org/security/2015/dsa-3408","hostname":"www.debian.org","tags":["X Refsource MISC","Third Party Advisory"]},{"url":"http://www.securityfocus.com/archive/1/537012/100/0/threaded","label":"www.securityfocus.com/archive/1/537012/100/0/threaded","hostname":"www.securityfocus.com","tags":["X Refsource MISC","Third Party Advisory","VDB Entry"]},{"url":"https://blog.hboeck.de/archives/877-A-little-POODLE-left-in-GnuTLS-old-versions.html","label":"blog.hboeck.de/archives/877-A-little-POODLE-left-in-GnuTLS-old-versions.html","hostname":"blog.hboeck.de","tags":["X Refsource MISC","Third Party Advisory","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2015-8313","label":"ubuntu.com/security/CVE-2015-8313","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-2821-1","label":"ubuntu.com/security/notices/USN-2821-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2015-8313","label":"www.cve.org/CVERecord?id=CVE-2015-8313","hostname":"www.cve.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":["SUSE-SU-2016:0077-1"],"duplicates":[],"related":["SUSE-SU-2016:0077-1","USN-2821-1"]},"timeline":[{"kind":"published","date":"2019-12-20T13:10:23.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-06T08:13:32.090Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":24,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T11:53:12.237Z","stale":false,"partial":false}}