{"cve":{"cve_id":"CVE-2011-3348","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.2238,"epss_percentile":0.97383,"epss_as_of":"2026-06-23","description":"The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary \"error state\" in the backend server) via a malformed HTTP request.","published_at":"2011-09-19T15:00:00Z","last_modified_at":"2026-06-16T23:33:07.193000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-400"],"nvd_references":["http://marc.info/?l=bugtraq&m=131731002122529&w=2","https://exchange.xforce.ibmcloud.com/vulnerabilities/69804","http://support.apple.com/kb/HT5130","http://www.redhat.com/support/errata/RHSA-2011-1391.html","https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14941","http://rhn.redhat.com/errata/RHSA-2012-0543.html","http://marc.info/?l=bugtraq&m=132033751509019&w=2","http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html","http://www.mandriva.com/security/advisories?name=MDVSA-2011:168","http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html","http://community.jboss.org/message/625307","http://www.securityfocus.com/bid/49616","http://rhn.redhat.com/errata/RHSA-2012-0542.html","http://www.apache.org/dist/httpd/Announcement2.2.html","http://marc.info/?l=bugtraq&m=131731002122529&w=2","http://httpd.apache.org/security/vulnerabilities_22.html#2.2.21","http://www.securitytracker.com/id?1026054","http://marc.info/?l=bugtraq&m=132033751509019&w=2","https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18154","http://secunia.com/advisories/46013","https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/r688df6f16f141e966a0a47f817e559312b3da27886f59116a94b273d%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/re2e23465bbdb17ffe109d21b4f192e6b58221cd7aa8797d530b4cd75%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/r1d201e3da31a2c8aa870c8314623caef7debd74a13d0f25205e26f15%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E","https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:05:58.513228Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"apache","vendor_name":"apache","product_slug":"http-server","product_name":"http_server","version_start":"2.2.12","version_start_inclusive":true,"version_end":"2.2.20","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"jboss-enterprise-web-server","product_name":"jboss_enterprise_web_server","version_start":"1.0.0","version_start_inclusive":true,"version_end":"1.0.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:redhat:jboss_enterprise_web_server:1.0.0:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"http://marc.info/?l=bugtraq&m=131731002122529&w=2","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/69804","source_type":"MISC","tags":[]},{"url":"http://support.apple.com/kb/HT5130","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.redhat.com/support/errata/RHSA-2011-1391.html","source_type":"MISC","tags":[]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14941","source_type":"MISC","tags":[]},{"url":"http://rhn.redhat.com/errata/RHSA-2012-0543.html","source_type":"MISC","tags":[]},{"url":"http://marc.info/?l=bugtraq&m=132033751509019&w=2","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2011:168","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://community.jboss.org/message/625307","source_type":"MISC","tags":[]},{"url":"http://www.securityfocus.com/bid/49616","source_type":"MISC","tags":[]},{"url":"http://rhn.redhat.com/errata/RHSA-2012-0542.html","source_type":"MISC","tags":[]},{"url":"http://www.apache.org/dist/httpd/Announcement2.2.html","source_type":"MISC","tags":[]},{"url":"http://marc.info/?l=bugtraq&m=131731002122529&w=2","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://httpd.apache.org/security/vulnerabilities_22.html#2.2.21","source_type":"MISC","tags":[]},{"url":"http://www.securitytracker.com/id?1026054","source_type":"MISC","tags":[]},{"url":"http://marc.info/?l=bugtraq&m=132033751509019&w=2","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18154","source_type":"MISC","tags":[]},{"url":"http://secunia.com/advisories/46013","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/r688df6f16f141e966a0a47f817e559312b3da27886f59116a94b273d%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/re2e23465bbdb17ffe109d21b4f192e6b58221cd7aa8797d530b4cd75%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/r1d201e3da31a2c8aa870c8314623caef7debd74a13d0f25205e26f15%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E","source_type":"MAILING_LIST","tags":["mailing-list"]}],"timeline":[{"type":"published","at":"2011-09-19T15:00:00Z","label":"CVE published","source":null}]}