Bug 873695 (CVE-2012-2733)

Summary:	CVE-2012-2733 tomcat: HTTP NIO connector OOM DoS via a request with large headers
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akurtako, aneelica, djorm, dknox, dwalluck, ivan.afonichev, java-sig-commits, jdennis, kdaniel, lfuka, pcheung, sochotni
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Apache Tomcat 6.0.36, Apache Tomcat 7.0.28	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-07-01 00:44:49 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	873703, 873707, 881602, 881603, 881605
Bug Blocks:	873710

Description Jan Lieskovsky 2012-11-06 14:03:22 UTC

A denial of service flaw was found in the way Tomcat's HTTP NIO connector enforced limits on the permitted size of request headers. A remote attacker could use this flaw to trigger an OutOfMemoryError by sending a specially-crafted request with very large headers.

This flaw affects all versions of Tomcat up to 6.0.35 [1] and 7.0.27 [2].

[1] http://tomcat.apache.org/security-6.html#Fixed_in_Apache_Tomcat_6.0.36
[2] http://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.28

Relevant upstream patches are:
Tomcat 6: http://svn.apache.org/viewvc?view=rev&rev=1356208
Tomcat 7: http://svn.apache.org/viewvc?view=rev&rev=1350301

Comment 1 Jan Lieskovsky 2012-11-06 14:05:47 UTC

This issue affects the version of the tomcat6 package as shipped with JBoss Enterprise Web Server 1.0.2.

--

This issue affects the versions of the tomcat6 package, as shipped with Fedora release of 16 and 17.

Comment 3 Jan Lieskovsky 2012-11-06 14:10:51 UTC

Relevant upstream patch for Tomcat 7:
[3] http://svn.apache.org/viewvc?view=rev&rev=1350301

Affected Tomcat 7 versions: From 7.0.0 up to 7.0.27.

Comment 4 Jan Lieskovsky 2012-11-06 14:14:37 UTC

This issue affects the version of the tomcat package, as shipped with Fedora release of 16.

--

This issue did not affect the version of the tomcat package, as shipped with Fedora release of 17 (that version was already updated).

Comment 5 Jan Lieskovsky 2012-11-06 14:17:22 UTC

Created tomcat6 tracking bugs for this issue

Affects: fedora-all [bug 873703]

Comment 6 Jan Lieskovsky 2012-11-06 14:22:48 UTC

Created tomcat tracking bugs for this issue

Affects: fedora-16 [bug 873707]

Comment 7 Arun Babu Neelicattu 2012-11-29 08:12:21 UTC

This flaw does not affect jbossweb as the NIO connector is not present.

Comment 9 Fedora Update System 2012-12-19 08:29:13 UTC

tomcat-7.0.33-1.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 13 errata-xmlrpc 2013-02-19 20:30:51 UTC

This issue has been addressed in following products:

  JBoss Enterprise Web Server 2.0.0

Via RHSA-2013:0265 https://rhn.redhat.com/errata/RHSA-2013-0265.html

Comment 14 errata-xmlrpc 2013-02-19 22:14:55 UTC

This issue has been addressed in following products:

  JBEWS 2 for RHEL 5
  JBEWS 2 for RHEL 6

Via RHSA-2013:0266 https://rhn.redhat.com/errata/RHSA-2013-0266.html