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CentOS 6 : tomcat6 (CESA-2012:0475)
medium Nessus Plugin ID 58752
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Synopsis
The remote CentOS host is missing one or more security updates.Description
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.
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 Walde 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.
Solution
Update the affected tomcat6 packages.See Also
Plugin Details
Severity: Medium
ID: 58752
File Name: centos_RHSA-2012-0475.nasl
Version: 1.15
Type: local
Agent: unix
Family: CentOS Local Security Checks
Published: 4/16/2012
Updated: 1/4/2021
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.5
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.9
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2011-4858
Vulnerability Information
CPE: p-cpe:/a:centos:centos:tomcat6, cpe:/o:centos:centos:6, p-cpe:/a:centos:centos:tomcat6-jsp-2.1-api, p-cpe:/a:centos:centos:tomcat6-el-2.1-api, p-cpe:/a:centos:centos:tomcat6-webapps, p-cpe:/a:centos:centos:tomcat6-servlet-2.5-api, p-cpe:/a:centos:centos:tomcat6-docs-webapp, p-cpe:/a:centos:centos:tomcat6-lib, p-cpe:/a:centos:centos:tomcat6-admin-webapps, p-cpe:/a:centos:centos:tomcat6-javadoc
Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 4/11/2012
Vulnerability Publication Date: 1/5/2012
Reference Information
CVE: CVE-2011-4858, CVE-2012-0022
RHSA: 2012:0475