{"id":"CVE-2012-5533","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-5533","generatedAt":"2026-11-05T08:05:28.062Z","title":"The http_request_split_value function in request.c in lighttpd before 1.4.32 allows remote attackers to cause a denial of service (infinite loop) via a request with a header containing an empty token, as demonstrated using the \"Connection:…","description":"The http_request_split_value function in request.c in lighttpd before 1.4.32 allows remote attackers to cause a denial of service (infinite loop) via a request with a header containing an empty token, as demonstrated using the \"Connection: TE,,Keep-Alive\" header.","published":"2012-11-24T20:55:04.000Z","lastModified":"2026-06-16T23:46:58.000Z","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":["CWE-399"],"affected":["lighttpd/lighttpd"],"epss":{"score":0.12038,"percentile":0.96149,"date":"2026-11-04","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2012-11-22","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":22902,"kind":"exploit","title":"lighttpd 1.4.31 - Denial of Service (PoC)","url":"https://www.exploit-db.com/exploits/22902","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/22902.sh","file":"exploits/linux/dos/22902.sh","published":"2012-11-22","added":"2012-11-22","updated":"2012-11-22","author":"t4c","type":"dos","platform":"linux","port":null,"verified":false,"codes":["CVE-2012-5533","OSVDB-87623"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comlighttpd-1.4.31.tar.gz","screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 12.0%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://download.lighttpd.net/lighttpd/security/lighttpd-1.4.31_fix_connection_header_dos.patch","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2012_01.txt","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2012-11/msg00044.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2014-01/msg00051.html","source":"secalert@redhat.com"},{"url":"http://marc.info/?l=bugtraq&m=141576815022399&w=2","source":"secalert@redhat.com"},{"url":"http://osvdb.org/87623","source":"secalert@redhat.com"},{"url":"http://packetstormsecurity.org/files/118282/Simple-Lighttpd-1.4.31-Denial-Of-Service.html","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/51268","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/51298","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.exploit-db.com/exploits/22902","tags":["Exploit"],"source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2013:100","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2012/11/21/1","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/56619","tags":["Exploit"],"source":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id?1027802","source":"secalert@redhat.com"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/80213","source":"secalert@redhat.com"},{"url":"https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0345","source":"secalert@redhat.com"},{"url":"http://download.lighttpd.net/lighttpd/security/lighttpd-1.4.31_fix_connection_header_dos.patch","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2012_01.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2012-11/msg00044.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2014-01/msg00051.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://marc.info/?l=bugtraq&m=141576815022399&w=2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://osvdb.org/87623","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.org/files/118282/Simple-Lighttpd-1.4.31-Denial-Of-Service.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/51268","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/51298","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.exploit-db.com/exploits/22902","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2013:100","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2012/11/21/1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/56619","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1027802","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/80213","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0345","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-5533","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."}