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Vulnerability record · CVE-2012-2733 · published 16 November 2012

CVE-2012-2733: Apache tomcat improper input validation vulnerability

Apache · Tomcat

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.

5.0 CVSS 2.0 Medium EPSS 8.7% · top 5.0% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
8.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
32References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-updates/2012-12/msg00089.html
http://lists.opensuse.org/opensuse-updates/2012-12/msg00090.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00037.html
http://marc.info/?l=bugtraq&m=136612293908376&w=2
http://marc.info/?l=bugtraq&m=139344343412337&w=2
http://secunia.com/advisories/51371
http://secunia.com/advisories/57126
http://svn.apache.org/viewvc?view=revision&revision=1350301
http://svn.apache.org/viewvc?view=revision&revision=1356208
http://tomcat.apache.org/security-6.html Vendor Advisory
http://tomcat.apache.org/security-7.html Vendor Advisory
http://www.securityfocus.com/bid/56402
http://www.securitytracker.com/id?1027729
http://www.ubuntu.com/usn/USN-1637-1
https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03748878
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19218
http://lists.opensuse.org/opensuse-updates/2012-12/msg00089.html
http://lists.opensuse.org/opensuse-updates/2012-12/msg00090.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00037.html
http://marc.info/?l=bugtraq&m=136612293908376&w=2
http://marc.info/?l=bugtraq&m=139344343412337&w=2
http://secunia.com/advisories/51371
http://secunia.com/advisories/57126
http://svn.apache.org/viewvc?view=revision&revision=1350301
http://svn.apache.org/viewvc?view=revision&revision=1356208
http://tomcat.apache.org/security-6.html Vendor Advisory
http://tomcat.apache.org/security-7.html Vendor Advisory
http://www.securityfocus.com/bid/56402
http://www.securitytracker.com/id?1027729
http://www.ubuntu.com/usn/USN-1637-1
https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03748878
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19218

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Source: NIST National Vulnerability Database (record CVE-2012-2733), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.