The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of JBoss AS 4, 5: code execution via Invoker

Synthesis of the vulnerability 

An attacker can use EJBInvokerServlet / JMXInvokerServlet of JBoss AS 4/5, in order to deploy a shell code, which is executed on the server.
Vulnerable systems: JBoss AS OpenSource, RHEL, JBoss EAP by Red Hat.
Severity of this threat: 3/4.
Number of vulnerabilities in this bulletin: 2.
Creation date: 20/11/2013.
Références of this weakness: 795645, BID-57552, CVE-2012-0874, CVE-2013-4810, RHSA-2013:0191-01, RHSA-2013:0192-01, RHSA-2013:0193-01, RHSA-2013:0194-01, RHSA-2013:0195-01, RHSA-2013:0196-01, RHSA-2013:0197-01, RHSA-2013:0198-01, RHSA-2013:0221-01, RHSA-2013:0533-01, VIGILANCE-VUL-13802.

Description of the vulnerability 

In versions 4 and 5 of JBoss AS, the HTTP Invoker service is used to access to EJB (Enterprise Java Beans) via RMI/HTTP.

However, access to the EJBInvokerServlet and JMXInvokerServlet servlets does not require an authentication by default.

An attacker can therefore use EJBInvokerServlet / JMXInvokerServlet of JBoss AS 4/5, in order to deploy a shell code, which is executed on the server.
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This security threat impacts software or systems such as JBoss AS OpenSource, RHEL, JBoss EAP by Red Hat.

Our Vigil@nce team determined that the severity of this computer weakness note is important.

The trust level is of type confirmed by the editor, with an origin of intranet client.

This bulletin is about 2 vulnerabilities.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this computer threat alert.

Solutions for this threat 

JBoss AS 4, 5: workaround for InvokerServlet.
A workaround is to secure the installation:
  https://community.jboss.org/wiki/SecureJboss
  https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/IBM%20TRIRIGA1/page/Jboss%20Security%20Remediation

JBoss Enterprise 5.2.0: update.
An update is available in information sources.

JBoss Enterprise BRMS Platform: version 5.3.1.
The version 5.3.1 is fixed:
  https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=brms&downloadType=distributions

JBoss Enterprise SOA Platform: version 5.3.1.
The version 5.3.1 is fixed:
  https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=soaplatform&downloadType=distributions
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