Issued:

2017-08-01

Updated:

2017-08-01

RHSA-2017:2247 - Low: tomcat security, bug fix, and enhancement update

Synopsis

Low: tomcat security, bug fix, and enhancement update

Type/Severity

Security Advisory Low

Topic

An update for tomcat is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.

The following packages have been upgraded to a later upstream version: tomcat (7.0.76). (BZ#1414895)

Security Fix(es):

• The Realm implementations did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder. (CVE-2016-0762)

• It was discovered that a malicious web application could bypass a configured SecurityManager via a Tomcat utility method that was accessible to web applications. (CVE-2016-5018)

• It was discovered that when a SecurityManager was configured, Tomcat's system property replacement feature for configuration files could be used by a malicious web application to bypass the SecurityManager and read system properties that should not be visible. (CVE-2016-6794)

• It was discovered that a malicious web application could bypass a configured SecurityManager via manipulation of the configuration parameters for the JSP Servlet. (CVE-2016-6796)

• It was discovered that it was possible for a web application to access any global JNDI resource whether an explicit ResourceLink had been configured or not. (CVE-2016-6797)

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

Updated Packages

• tomcat-7.0.76-2.el7.noarch.rpm
• tomcat-javadoc-7.0.76-2.el7.noarch.rpm
• tomcat-webapps-7.0.76-2.el7.noarch.rpm
• tomcat-7.0.76-2.el7.src.rpm
• tomcat-jsvc-7.0.76-2.el7.noarch.rpm
• tomcat-admin-webapps-7.0.76-2.el7.noarch.rpm
• tomcat-lib-7.0.76-2.el7.noarch.rpm
• tomcat-el-2.2-api-7.0.76-2.el7.noarch.rpm
• tomcat-jsp-2.2-api-7.0.76-2.el7.noarch.rpm
• tomcat-docs-webapp-7.0.76-2.el7.noarch.rpm
• tomcat-servlet-3.0-api-7.0.76-2.el7.noarch.rpm

Fixes

• This content is not included.BZ - 1390493
• This content is not included.BZ - 1390515
• This content is not included.BZ - 1390520
• This content is not included.BZ - 1390525
• This content is not included.BZ - 1390526
• This content is not included.BZ - 1411738
• This content is not included.BZ - 1414895

CVEs

• CVE-2016-0762
• CVE-2016-5018
• CVE-2016-6794
• CVE-2016-6796
• CVE-2016-6797

References

• https://access.redhat.com/security/updates/classification/#low
• https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.4_Release_Notes/index.html

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.