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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: tomcat6 security update
Advisory ID:       RHSA-2013:0623-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2013-0623.html
Issue date:        2013-03-11
CVE Names:         CVE-2012-3546 CVE-2012-4534 CVE-2012-5885 
                   CVE-2012-5886 CVE-2012-5887 
=====================================================================

1. Summary:

Updated tomcat6 packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 6.

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

It was found that when an application used FORM authentication, along with
another component that calls request.setUserPrincipal() before the call to
FormAuthenticator#authenticate() (such as the Single-Sign-On valve), it was
possible to bypass the security constraint checks in the FORM authenticator
by appending "/j_security_check" to the end of a URL. A remote attacker
with an authenticated session on an affected application could use this
flaw to circumvent authorization controls, and thereby access resources not
permitted by the roles associated with their authenticated session.
(CVE-2012-3546)

A flaw was found in the way Tomcat handled sendfile operations when using
the HTTP NIO (Non-Blocking I/O) connector and HTTPS. A remote attacker
could use this flaw to cause a denial of service (infinite loop). The HTTP
blocking IO (BIO) connector, which is not vulnerable to this issue, is used
by default in Red Hat Enterprise Linux 6. (CVE-2012-4534)

Multiple weaknesses were found in the Tomcat DIGEST authentication
implementation, effectively reducing the security normally provided by
DIGEST authentication. A remote attacker could use these flaws to perform
replay attacks in some circumstances. (CVE-2012-5885, CVE-2012-5886,
CVE-2012-5887)

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/knowledge/articles/11258

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

873664 - CVE-2012-5885 CVE-2012-5886 CVE-2012-5887 tomcat: three DIGEST
 authentication implementation issues
883634 - CVE-2012-3546 Tomcat/JBoss Web: Bypass of security constraints
883637 - CVE-2012-4534 Tomcat - Denial Of Service when using NIO+SSL+sendfile

6. Package List:

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

Source:
tomcat6-6.0.24-52.el6_4.src.rpm

noarch:
tomcat6-6.0.24-52.el6_4.noarch.rpm
tomcat6-admin-webapps-6.0.24-52.el6_4.noarch.rpm
tomcat6-docs-webapp-6.0.24-52.el6_4.noarch.rpm
tomcat6-el-2.1-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-javadoc-6.0.24-52.el6_4.noarch.rpm
tomcat6-jsp-2.1-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-lib-6.0.24-52.el6_4.noarch.rpm
tomcat6-servlet-2.5-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-webapps-6.0.24-52.el6_4.noarch.rpm

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

Source:
tomcat6-6.0.24-52.el6_4.src.rpm

noarch:
tomcat6-6.0.24-52.el6_4.noarch.rpm
tomcat6-admin-webapps-6.0.24-52.el6_4.noarch.rpm
tomcat6-docs-webapp-6.0.24-52.el6_4.noarch.rpm
tomcat6-el-2.1-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-javadoc-6.0.24-52.el6_4.noarch.rpm
tomcat6-jsp-2.1-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-lib-6.0.24-52.el6_4.noarch.rpm
tomcat6-servlet-2.5-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-webapps-6.0.24-52.el6_4.noarch.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
tomcat6-6.0.24-52.el6_4.src.rpm

noarch:
tomcat6-6.0.24-52.el6_4.noarch.rpm
tomcat6-el-2.1-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-jsp-2.1-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-lib-6.0.24-52.el6_4.noarch.rpm
tomcat6-servlet-2.5-api-6.0.24-52.el6_4.noarch.rpm

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

Source:
tomcat6-6.0.24-52.el6_4.src.rpm

noarch:
tomcat6-admin-webapps-6.0.24-52.el6_4.noarch.rpm
tomcat6-docs-webapp-6.0.24-52.el6_4.noarch.rpm
tomcat6-javadoc-6.0.24-52.el6_4.noarch.rpm
tomcat6-webapps-6.0.24-52.el6_4.noarch.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
tomcat6-6.0.24-52.el6_4.src.rpm

noarch:
tomcat6-6.0.24-52.el6_4.noarch.rpm
tomcat6-el-2.1-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-jsp-2.1-api-6.0.24-52.el6_4.noarch.rpm
tomcat6-lib-6.0.24-52.el6_4.noarch.rpm
tomcat6-servlet-2.5-api-6.0.24-52.el6_4.noarch.rpm

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

Source:
tomcat6-6.0.24-52.el6_4.src.rpm

noarch:
tomcat6-admin-webapps-6.0.24-52.el6_4.noarch.rpm
tomcat6-docs-webapp-6.0.24-52.el6_4.noarch.rpm
tomcat6-javadoc-6.0.24-52.el6_4.noarch.rpm
tomcat6-webapps-6.0.24-52.el6_4.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-2012-3546.html
https://www.redhat.com/security/data/cve/CVE-2012-4534.html
https://www.redhat.com/security/data/cve/CVE-2012-5885.html
https://www.redhat.com/security/data/cve/CVE-2012-5886.html
https://www.redhat.com/security/data/cve/CVE-2012-5887.html
https://access.redhat.com/security/updates/classification/#important
http://tomcat.apache.org/security-6.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2013 Red Hat, Inc.
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