{"schemaVersion":3,"id":"CVE-2013-5705","aliases":["MGASA-2014-0180","UBUNTU-CVE-2013-5705","DEBIAN-CVE-2013-5705","DLA-34-1","DSA-2991-1"],"status":"published","duplicateOf":null,"title":null,"description":"apache2/modsecurity.c in ModSecurity before 2.7.6 allows remote attackers to bypass rules by using chunked transfer coding with a capitalized Chunked value in the Transfer-Encoding HTTP header.","dates":{"published":"2014-04-15T10:00:00.000Z","modified":"2024-08-06T17:22:30.145Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5,"severity":"medium","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.02722,"percentile":0.85815,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0.05199999999999996,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.0267},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02722,"percentile":0.85815}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0267,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02722,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02722,"percentile":0.85815}]},"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_4C4A419CC9071952","name":"Exploit Reference (martin.swende.se)","source":"reference","url":"http://martin.swende.se/blog/HTTPChunked.html","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[],"affected":[{"vendor":"debian","product":"libapache-mod-security","name":"libapache-mod-security","label":"libapache-mod-security","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libapache-mod-security","purlType":"deb","versions":[{"text":"< 2.5.12-1+squeeze4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.5.12-1+squeeze4","eol":null,"hubHref":null},{"vendor":"debian","product":"modsecurity-apache","name":"modsecurity-apache","label":"modsecurity-apache","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/modsecurity-apache","purlType":"deb","versions":[{"text":"< 2.7.7-1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.6.6-6+deb7u2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.7.7-1 | < 2.6.6-6+deb7u2","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"modsecurity-apache","name":"modsecurity-apache","label":"modsecurity-apache","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/modsecurity-apache","purlType":"deb","versions":[{"text":"< 2.7.7-2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.7.7-2","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}],"versionsText":"7.0 | 8.0","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":"mageia","product":"apache-mod_security","name":"apache-mod_security","label":"apache-mod_security","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/apache-mod_security","purlType":"rpm","versions":[{"text":"< 2.7.4-1.1.mga3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.7.4-1.1.mga3","eol":null,"hubHref":null},{"vendor":"mageia","product":"apache-mod_security","name":"apache-mod_security","label":"apache-mod_security","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/apache-mod_security","purlType":"rpm","versions":[{"text":"< 2.7.5-2.1.mga4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.7.5-2.1.mga4","eol":null,"hubHref":null},{"vendor":"trustwave","product":"modsecurity","name":"modsecurity","label":"modsecurity","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.7.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.7.6","eol":null,"hubHref":"/vendor/trustwave/modsecurity"}],"affectedCount":7,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://github.com/SpiderLabs/ModSecurity/commit/f8d441cd25172fdfe5b613442fedfc0da3cc333d","label":"github.com/SpiderLabs/ModSecurity/commit/f8d441cd25172fdfe5b613442fedfc0da3cc333d","hostname":"github.com","tags":["X Refsource CONFIRM","Patch","Third Party Advisory"]},{"url":"http://www.debian.org/security/2014/dsa-2991","label":"www.debian.org/security/2014/dsa-2991","hostname":"www.debian.org","tags":["Vendor Advisory","X Refsource DEBIAN","Third Party Advisory"]},{"url":"http://martin.swende.se/blog/HTTPChunked.html","label":"martin.swende.se/blog/HTTPChunked.html","hostname":"martin.swende.se","tags":["X Refsource MISC","Exploit","Third Party Advisory","REPORT"]},{"url":"https://advisories.mageia.org/MGASA-2014-0180.html","label":"advisories.mageia.org/MGASA-2014-0180.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://lists.fedoraproject.org/pipermail/package-announce/2014-April/131375.html","label":"lists.fedoraproject.org/pipermail/package-announce/2014-April/131375.html","hostname":"lists.fedoraproject.org","tags":["WEB"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=13215","label":"bugs.mageia.org/show_bug.cgi?id=13215","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2013-5705","label":"ubuntu.com/security/CVE-2013-5705","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2013-5705","label":"www.cve.org/CVERecord?id=CVE-2013-5705","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2013-5705","label":"security-tracker.debian.org/tracker/CVE-2013-5705","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2014-04-15T10:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-06T17:22:30.145Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T11:00:28.759Z","stale":false,"partial":false}}