{"api_version":"1","generated_at":"2026-07-23T07:33:57+00:00","cve":"CVE-2011-4415","urls":{"html":"https://cve.report/CVE-2011-4415","api":"https://cve.report/api/cve/CVE-2011-4415.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2011-4415","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-4415"},"summary":{"title":"CVE-2011-4415","description":"The ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the size of values of environment variables, which allows local users to cause a denial of service (memory consumption or NULL pointer dereference) via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, related to (1) the \"len +=\" statement and (2) the apr_pcalloc function call, a different vulnerability than 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ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the size of values of environment variables, which allows local users to cause a denial of service (memory consumption or NULL pointer dereference) via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, related to (1) the \"len +=\" statement and (2) the apr_pcalloc function call, a different vulnerability than CVE-2011-3607.","Type":"Description","Title":"CVE-2011-4415"},{"CveYear":"2011","CveId":"4415","Ordinal":"2","NoteData":"2011-11-08","Type":"Other","Title":"Published"},{"CveYear":"2011","CveId":"4415","Ordinal":"3","NoteData":"2012-07-03","Type":"Other","Title":"Modified"}]}}}