{"id":"CVE-2012-2733","description":"java/org/apache/coyote/http11/InternalNioInputBuffer.java in the HTTP NIO connector in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.28 does not properly restrict the request-header size, which allows remote attackers to cause a denial of service (memory consumption) via a large amount of header data.","cvssScore":5,"cvssVersion":"2.0","cvssVector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","cvssMetrics":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","source":"nvd@nist.gov","sourceName":"NVD","type":"Primary"}],"cwes":["CWE-20"],"resolved":"NO-FIX-IDENTIFIED","published":"2012-11-16","lastModified":"2026-06-16","affectedProducts":[{"vendor":"apache","product":"tomcat","version":"6.0"},{"vendor":"apache","product":"tomcat","version":"6.0.0"},{"vendor":"apache","product":"tomcat","version":"6.0.0","update":"alpha"},{"vendor":"apache","product":"tomcat","version":"6.0.1"},{"vendor":"apache","product":"tomcat","version":"6.0.1","update":"alpha"},{"vendor":"apache","product":"tomcat","version":"6.0.2"},{"vendor":"apache","product":"tomcat","version":"6.0.2","update":"alpha"},{"vendor":"apache","product":"tomcat","version":"6.0.2","update":"beta"},{"vendor":"apache","product":"tomcat","version":"6.0.3"},{"vendor":"apache","product":"tomcat","version":"6.0.4"},{"vendor":"apache","product":"tomcat","version":"6.0.4","update":"alpha"},{"vendor":"apache","product":"tomcat","version":"6.0.5"},{"vendor":"apache","product":"tomcat","version":"6.0.6"},{"vendor":"apache","product":"tomcat","version":"6.0.6","update":"alpha"},{"vendor":"apache","product":"tomcat","version":"6.0.7"},{"vendor":"apache","product":"tomcat","version":"6.0.7","update":"alpha"},{"vendor":"apache","product":"tomcat","version":"6.0.7","update":"beta"},{"vendor":"apache","product":"tomcat","version":"6.0.8"},{"vendor":"apache","product":"tomcat","version":"6.0.8","update":"alpha"},{"vendor":"apache","product":"tomcat","version":"6.0.9"}],"totalAffectedProducts":1,"references":[{"url":"http://lists.opensuse.org/opensuse-updates/2012-12/msg00089.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2012-12/msg00090.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2013-01/msg00037.html","source":"secalert@redhat.com"},{"url":"http://marc.info/?l=bugtraq\u0026m=136612293908376\u0026w=2","source":"secalert@redhat.com"},{"url":"http://marc.info/?l=bugtraq\u0026m=139344343412337\u0026w=2","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/51371","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/57126","source":"secalert@redhat.com"},{"url":"http://svn.apache.org/viewvc?view=revision\u0026revision=1350301","source":"secalert@redhat.com"},{"url":"http://svn.apache.org/viewvc?view=revision\u0026revision=1356208","source":"secalert@redhat.com"},{"url":"http://tomcat.apache.org/security-6.html","source":"secalert@redhat.com","tags":["Vendor Advisory"]}],"reasoning":{"decidingSource":"no-exploit","decidingReason":"Resolved from QUEUED-FOR-REVIEW: this CVE affects a known product, but nothing published names a fix and nothing published shows an exploit. That is a statement about the evidence, not about the defect — it does not mean the vulnerability is unimportant or unreachable, only that neither of the two things VRT can act on exists.","verdicts":[{"rule":"rejected","stage":"identity","outcome":"no-match"},{"rule":"armr-patch-file","stage":"scope","outcome":"no-match"},{"rule":"armr-secure-rule-file","stage":"scope","outcome":"no-match"},{"rule":"manual-classification","stage":"scope","outcome":"no-match"},{"rule":"h2-history","stage":"scope","outcome":"no-match"},{"rule":"non-java-upstream","stage":"scope","outcome":"no-match"},{"rule":"oracle-component","stage":"scope","outcome":"no-match"},{"rule":"osv-maven","stage":"scope","outcome":"no-match"},{"rule":"cna-maven-package","stage":"scope","outcome":"no-match"},{"rule":"known-cpe-product","stage":"scope","outcome":"matched","status":"QUEUED-FOR-REVIEW","detail":"Matches known products: apache/tomcat"},{"rule":"patch-hint","stage":"disposition","outcome":"no-match"},{"rule":"open-source-maven","stage":"disposition","outcome":"no-match"},{"rule":"poc-derivable","stage":"disposition","outcome":"no-match"},{"rule":"no-exploit","stage":"disposition","outcome":"matched","status":"NO-FIX-IDENTIFIED","detail":"No public exploits or POCs found in Exploit-DB, Nuclei templates, or GitHub POC repositories, and CISA's Vulnrichment assessment records no demonstrated exploit. No upstream fix reference or open-source Maven package was found either, so there is nothing to act on from either direction.","decisive":true},{"rule":"secure-rule-match","stage":"disposition","outcome":"no-match"},{"rule":"below-action-threshold","stage":"disposition","outcome":"skipped"},{"rule":"no-exploit-published","stage":"disposition","outcome":"skipped"}],"affectedProducts":[{"vendor":"apache","product":"tomcat","isKnown":true,"cpe":"cpe:2.3:a:apache:tomcat:6.0:*:*:*:*:*:*:*","source":"yaml"}]},"assessment":{"record":{"state":"active"},"protection":{"level":"none"},"action":{"state":"not-needed"},"review":{"state":"automated","basis":"upstream-data"}},"signals":{"hasPOC":false,"pocCount":0},"kev":{"inKEV":false},"epss":{"available":true,"score":0.08742,"percentile":0.94859},"ssvc":{"available":false}}