[RHSA-2012:0475-01] Moderate: tomcat6 security update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Moderate: tomcat6 security update

Advisory ID: RHSA-2012:0475-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0475.html

Issue date: 2012-04-11

CVE Names: CVE-2011-4858 CVE-2012-0022

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1. Summary:

 

Updated tomcat6 packages that fix two security issues are now available for

Red Hat Enterprise Linux 6.

 

The Red Hat Security Response Team has rated this update as having moderate

security impact. Common Vulnerability Scoring System (CVSS) base scores,

which give detailed severity ratings, are available for each vulnerability

from the CVE links in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Desktop Optional (v. 6) - noarch

Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch

Red Hat Enterprise Linux Server (v. 6) - noarch

Red Hat Enterprise Linux Server Optional (v. 6) - noarch

Red Hat Enterprise Linux Workstation (v. 6) - noarch

Red Hat Enterprise Linux Workstation Optional (v. 6) - noarch

 

3. Description:

 

Apache Tomcat is a servlet container for the Java Servlet and JavaServer

Pages (JSP) technologies.

 

It was found that the Java hashCode() method implementation was susceptible

to predictable hash collisions. A remote attacker could use this flaw to

cause Tomcat to use an excessive amount of CPU time by sending an HTTP

request with a large number of parameters whose names map to the same hash

value. This update introduces a limit on the number of parameters processed

per request to mitigate this issue. The default limit is 512 for

parameters and 128 for headers. These defaults can be changed by setting

the org.apache.tomcat.util.http.Parameters.MAX_COUNT and

org.apache.tomcat.util.http.MimeHeaders.MAX_COUNT system properties.

(CVE-2011-4858)

 

It was found that Tomcat did not handle large numbers of parameters and

large parameter values efficiently. A remote attacker could make Tomcat

use an excessive amount of CPU time by sending an HTTP request containing a

large number of parameters or large parameter values. This update

introduces limits on the number of parameters and headers processed per

request to address this issue. Refer to the CVE-2011-4858 description for

information about the org.apache.tomcat.util.http.Parameters.MAX_COUNT and

org.apache.tomcat.util.http.MimeHeaders.MAX_COUNT system properties.

(CVE-2012-0022)

 

Red Hat would like to thank oCERT for reporting CVE-2011-4858. oCERT

acknowledges Julian Wälde and Alexander Klink as the original reporters of

CVE-2011-4858.

 

Users of Tomcat should upgrade to these updated packages, which correct

these issues. Tomcat must be restarted for this update to take effect.

 

4. Solution:

 

Before applying this update, make sure all previously-released errata

relevant to your system have been applied.

 

This update is available via the Red Hat Network. Details on how to

use the Red Hat Network to apply this update are available at

https://access.redhat.com/kb/docs/DOC-11259

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

750521 - CVE-2011-4858 tomcat: hash table collisions CPU usage DoS (oCERT-2011-003)

783359 - CVE-2012-0022 tomcat: large number of parameters DoS

 

6. Package List:

 

Red Hat Enterprise Linux Desktop Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/tomcat6-6.0.24-36.el6_2.src.rpm

 

noarch:

tomcat6-6.0.24-36.el6_2.noarch.rpm

tomcat6-admin-webapps-6.0.24-36.el6_2.noarch.rpm

tomcat6-docs-webapp-6.0.24-36.el6_2.noarch.rpm

tomcat6-el-2.1-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-javadoc-6.0.24-36.el6_2.noarch.rpm

tomcat6-jsp-2.1-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-lib-6.0.24-36.el6_2.noarch.rpm

tomcat6-servlet-2.5-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-webapps-6.0.24-36.el6_2.noarch.rpm

 

Red Hat Enterprise Linux HPC Node Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/tomcat6-6.0.24-36.el6_2.src.rpm

 

noarch:

tomcat6-6.0.24-36.el6_2.noarch.rpm

tomcat6-admin-webapps-6.0.24-36.el6_2.noarch.rpm

tomcat6-docs-webapp-6.0.24-36.el6_2.noarch.rpm

tomcat6-el-2.1-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-javadoc-6.0.24-36.el6_2.noarch.rpm

tomcat6-jsp-2.1-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-lib-6.0.24-36.el6_2.noarch.rpm

tomcat6-servlet-2.5-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-webapps-6.0.24-36.el6_2.noarch.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/tomcat6-6.0.24-36.el6_2.src.rpm

 

noarch:

tomcat6-6.0.24-36.el6_2.noarch.rpm

tomcat6-el-2.1-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-jsp-2.1-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-lib-6.0.24-36.el6_2.noarch.rpm

tomcat6-servlet-2.5-api-6.0.24-36.el6_2.noarch.rpm

 

Red Hat Enterprise Linux Server Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/tomcat6-6.0.24-36.el6_2.src.rpm

 

noarch:

tomcat6-admin-webapps-6.0.24-36.el6_2.noarch.rpm

tomcat6-docs-webapp-6.0.24-36.el6_2.noarch.rpm

tomcat6-javadoc-6.0.24-36.el6_2.noarch.rpm

tomcat6-webapps-6.0.24-36.el6_2.noarch.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/tomcat6-6.0.24-36.el6_2.src.rpm

 

noarch:

tomcat6-6.0.24-36.el6_2.noarch.rpm

tomcat6-el-2.1-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-jsp-2.1-api-6.0.24-36.el6_2.noarch.rpm

tomcat6-lib-6.0.24-36.el6_2.noarch.rpm

tomcat6-servlet-2.5-api-6.0.24-36.el6_2.noarch.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/tomcat6-6.0.24-36.el6_2.src.rpm

 

noarch:

tomcat6-admin-webapps-6.0.24-36.el6_2.noarch.rpm

tomcat6-docs-webapp-6.0.24-36.el6_2.noarch.rpm

tomcat6-javadoc-6.0.24-36.el6_2.noarch.rpm

tomcat6-webapps-6.0.24-36.el6_2.noarch.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2011-4858.html

https://www.redhat.com/security/data/cve/CVE-2012-0022.html

https://access.redhat.com/security/updates/classification/#moderate

http://tomcat.apache.org/security-6.html

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2012 Red Hat, Inc.

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