RHSA-2010:0119 - Security Advisory

Topic

JBoss Enterprise Web Server 1.0.1 is now available for Red Hat Enterprise
Linux 4 and 5.

This update has been rated as having low security impact by the Red Hat
Security Response Team.

Description

JBoss Enterprise Web Server is a fully integrated and certified set
of components for hosting Java web applications. It is comprised of the
industry's leading web server (Apache HTTP Server), the popular Apache
Tomcat servlet container, as well as the mod_jk connector and the Tomcat
Native library.

This 1.0.1 release of JBoss Enterprise Web Server serves as a replacement
to JBoss Enterprise Web Server 1.0.0 GA. These updated packages include
a number of bug fixes. For detailed component, installation, and bug fix
information, refer to the JBoss Enterprise Web Server 1.0.1 Release Notes,
available shortly from the link in the References section of this erratum.

The following security issues are also fixed with this release:

A directory traversal flaw was found in the Tomcat deployment process. An
attacker could create a specially-crafted WAR file, which once deployed
by a local, unsuspecting user, would lead to attacker-controlled content
being deployed outside of the web root, into directories accessible to the
Tomcat process. (CVE-2009-2693)

A second directory traversal flaw was found in the Tomcat deployment
process. WAR file names were not sanitized, which could allow an attacker
to create a specially-crafted WAR file that could delete files in the
Tomcat host's work directory. (CVE-2009-2902)

A flaw was found in the way the TLS/SSL (Transport Layer Security/Secure
Sockets Layer) protocols handle session renegotiation. A man-in-the-middle
attacker could use this flaw to prefix arbitrary plain text to a client's
session (for example, an HTTPS connection to a website). This could force
the server to process an attacker's request as if authenticated using the
victim's credentials. (CVE-2009-3555)

This update provides a mitigation for this flaw in the following
components:

tomcat5 and tomcat6: A new attribute, allowUnsafeLegacyRenegotiation, is
available for the blocking IO (BIO) connector using JSSE, to enable or
disable TLS session renegotiation. The default value is "false", meaning
session renegotiation, both client- and server-initiated, is disabled by
default.

tomcat-native: Client-initiated renegotiation is now rejected by the native
connector. Server-initiated renegotiation is still allowed.

Refer to the following Knowledgebase article for additional details about
the CVE-2009-3555 flaw: http://kbase.redhat.com/faq/docs/DOC-20491

All users of JBoss Enterprise Web Server 1.0.0 on Red Hat Enterprise Linux
4 and 5 are advised to upgrade to these updated packages.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• JBoss Enterprise Web Server 1 for RHEL 5 x86_64
• JBoss Enterprise Web Server 1 for RHEL 5 i386

Fixes

• BZ - 533125 - CVE-2009-3555 TLS: MITM attacks via session renegotiation
• BZ - 558872 - JBEWS 1.0.1 release tracker bug for RHEL 4
• BZ - 558873 - JBEWS 1.0.1 release tracker bug for RHEL-5
• BZ - 559738 - CVE-2009-2693 tomcat: unexpected file deletion and/or alteration
• BZ - 559761 - CVE-2009-2902 tomcat: unexpected file deletion in work directory

CVEs

• CVE-2009-3555
• CVE-2009-2902
• CVE-2009-2693
• CVE-2010-2086

References

• http://www.redhat.com/security/updates/classification/#low
• http://kbase.redhat.com/faq/docs/DOC-20491
• http://www.redhat.com/docs/en-US/JBoss_Enterprise_Web_Server/1.0.1/html-single/Release_Notes/index.html