{"id":"CVE-2011-4362","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-4362","generatedAt":"2026-10-27T19:04:48.138Z","title":"Integer signedness error in the base64_decode function in the HTTP authentication functionality (http_auth.c) in lighttpd 1.4 before 1.4.30 and 1.5 before SVN revision 2806 allows remote attackers to cause a denial of service (segmentation fault) via…","description":"Integer signedness error in the base64_decode function in the HTTP authentication functionality (http_auth.c) in lighttpd 1.4 before 1.4.30 and 1.5 before SVN revision 2806 allows remote attackers to cause a denial of service (segmentation fault) via crafted base64 input that triggers an out-of-bounds read with a negative index.","published":"2011-12-24T19:55:05.000Z","lastModified":"2026-06-16T23:34:51.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P"},"cwe":[],"affected":["lighttpd/lighttpd","debian/debian linux"],"epss":{"score":0.21106,"percentile":0.97562,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2011-12-31","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":18295,"kind":"exploit","title":"lighttpd - Denial of Service (PoC)","url":"https://www.exploit-db.com/exploits/18295","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/18295.txt","file":"exploits/linux/dos/18295.txt","published":"2011-12-31","added":"2011-12-31","updated":"2015-05-14","author":"pi3","type":"dos","platform":"linux","port":null,"verified":true,"codes":["CVE-2011-4362","OSVDB-77366"],"tags":null,"aliases":"p_cve-2011-4362.c","applicationUrl":"http://www.exploit-db.comlighttpd-1.4.29.tar.gz","screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 21.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://archives.neohapsis.com/archives/bugtraq/2011-12/0167.html","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://blog.pi3.com.pl/?p=277","tags":["Exploit","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2011_01.txt","tags":["Exploit","Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://jvn.jp/en/jp/JVN37417423/index.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://redmine.lighttpd.net/issues/2370","tags":["Exploit","Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/47260","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2011/dsa-2368","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.exploit-db.com/exploits/18295","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/11/29/13","tags":["Exploit","Mailing List","Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/11/29/8","tags":["Exploit","Mailing List","Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id?1026359","tags":["Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=758624","tags":["Issue Tracking","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/71536","tags":["Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2011-12/0167.html","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://blog.pi3.com.pl/?p=277","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2011_01.txt","tags":["Exploit","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://jvn.jp/en/jp/JVN37417423/index.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://redmine.lighttpd.net/issues/2370","tags":["Exploit","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/47260","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2011/dsa-2368","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.exploit-db.com/exploits/18295","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/11/29/13","tags":["Exploit","Mailing List","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/11/29/8","tags":["Exploit","Mailing List","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1026359","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=758624","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/71536","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-4362","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}