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Red Hat Enterprise Linux 6 RHSA-2011:0335-01 Critical tomcat6 DoS Issue

red hat
Calendar Grey March 9, 2011
Dist Redhat Esm H88
The recent Apache Tomcat 6 patch from Red Hat resolves significant vulnerabilities and defects for RHEL 6. Strengthen your system's security posture with this update.
Updated tomcat6 packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 6

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

Summary

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.
A denial of service flaw was found in the way certain strings were converted to Double objects. A remote attacker could use this flaw to cause Tomcat to hang via a specially-crafted HTTP request. (CVE-2010-4476)
A flaw was found in the Tomcat NIO (Non-Blocking I/O) connector. A remote attacker could use this flaw to cause a denial of service (out-of-memory condition) via a specially-crafted request containing a large NIO buffer size request value. (CVE-2011-0534)
This update also fixes the following bug:
* A bug in the "tomcat6" init script prevented additional Tomcat instances from starting. As well, running "service tomcat6 start" caused configuration options applied from "/etc/sysconfig/tomcat6" to be overwritten with those from "/etc/tomcat6/tomcat6.conf". With this update, multiple instances of Tomcat run as expected. (BZ#676922)
Users of Tomcat should upgrade to these updated packages, which contain backported patches to correct these issues. Tomcat must be restarted for this update to take effect.

Topics%20covered

Topics Covered

security advisory denial of service security issue Red Hat Enterprise server patch tomcat6 update

References

https://access.redhat.com/security/cve/CVE-2010-4476 https://access.redhat.com/security/cve/CVE-2011-0534 https://access.redhat.com/security/updates/classification/#important https://tomcat.apache.org/security-6.html

Package List

Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
noarch: tomcat6-6.0.24-24.el6_0.noarch.rpm tomcat6-admin-webapps-6.0.24-24.el6_0.noarch.rpm tomcat6-docs-webapp-6.0.24-24.el6_0.noarch.rpm tomcat6-el-2.1-api-6.0.24-24.el6_0.noarch.rpm tomcat6-javadoc-6.0.24-24.el6_0.noarch.rpm tomcat6-jsp-2.1-api-6.0.24-24.el6_0.noarch.rpm tomcat6-lib-6.0.24-24.el6_0.noarch.rpm tomcat6-log4j-6.0.24-24.el6_0.noarch.rpm tomcat6-servlet-2.5-api-6.0.24-24.el6_0.noarch.rpm tomcat6-webapps-6.0.24-24.el6_0.noarch.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
noarch: tomcat6-6.0.24-24.el6_0.noarch.rpm tomcat6-admin-webapps-6.0.24-24.el6_0.noarch.rpm tomcat6-docs-webapp-6.0.24-24.el6_0.noarch.rpm tomcat6-el-2.1-api-6.0.24-24.el6_0.noarch.rpm tomcat6-javadoc-6.0.24-24.el6_0.noarch.rpm tomcat6-jsp-2.1-api-6.0.24-24.el6_0.noarch.rpm tomcat6-lib-6.0.24-24.el6_0.noarch.rpm tomcat6-log4j-6.0.24-24.el6_0.noarch.rpm tomcat6-servlet-2.5-api-6.0.24-24.el6_0.noarch.rpm tomcat6-webapps-6.0.24-24.el6_0.noarch.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
noarch: tomcat6-6.0.24-24.el6_0.noarch.rpm tomcat6-el-2.1-api-6.0.24-24.el6_0.noarch.rpm tomcat6-jsp-2.1-api-6.0.24-24.el6_0.noarch.rpm tomcat6-lib-6.0.24-24.el6_0.noarch.rpm tomcat6-servlet-2.5-api-6.0.24-24.el6_0.noarch.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:0335-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0335.html
Issue date: 2011-03-09

Topic

Updated tomcat6 packages that fix two security issues and one bug are nowavailable for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. Common Vulnerability Scoring System (CVSS) basescores, which give detailed severity ratings, are available for eachvulnerability from the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory denial of service security issue Red Hat Enterprise server patch tomcat6 update

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

Bugs Fixed

674336 - CVE-2010-4476 JDK Double.parseDouble Denial-Of-Service

675338 - CVE-2011-0534 tomcat: remote DoS via NIO connector

676922 - Additionally Created Instances of Tomcat are broken / don't work

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