Oracle Java Runtime Environment JMX code execution

Notification Type: IBM Security Protection Alert
Notification Date: February 26, 2013
Notification Version: 1.0
Name: Oracle Java Runtime Environment JMX code execution
Public disclosure/
In the wild date:
February 20, 2013
Risk: High
CVE: CVE-2013-1486

Malware has been seen in the wild which combines and exploits two vulnerabilities in Java to execute arbitrary code. One of the vulnerabilities is in the implementation of certain classes in the package com.sun.jmx.mbeanserver which when exploited, can allow restricted classes to be loaded. IBM has existing coverage for this vulnerability with the signature Java_MBean_Code_Execution (see alert #459). IBM X-Force is adding coverage for the other vulnerability used for exploitation, CVE-2013-1486, which is a vulnerability in the com.sun.jmx.mbeanserver.Introspector class.


ISS Coverage

Product Content Version
Proventia Network IDS
Proventia Network IPS
Proventia Network MFS
Proventia Server (Linux)
RealSecure Network
RealSecure Server Sensor
Proventia Desktop
Proventia Server IPS (Windows)
Propagation Techniques ISS Protection Available

remote exploit

26 Feb 2013

* This signature is blocked by default and analyzes Java applet class files for classes and methods that may indicate an attempt to call the security manager with the intent of extending applet permissions.  Please Note:  The above Java signature will not fire unless JAR inflation is requested by setting the tune parameter "pam.content.jar.decompress" to "on".

Additional recommendations: We would recommend where possible disabling Java in browsers, and if absolutely necessary selectively turning it on for trusted sources.

Detailed Description

Business Impact:

These vulnerabilities could allow remote code execution if a user has Java plugin enabled for a browser and visits a website serving malicious applets.
An attacker would have to convince users to visit the website, typically by getting them to click a link in an email message or an Instant Messenger (IM) message that takes them to the attacker's website. Alternatively if an attacker has compromised a trusted site, then that can be used to serve malicious content as well.

*CVSS Base Score: 10.0
  Access Vector: Network
Access Complexity: Low
Authentication: None
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete
Adjusted Temporal Score: 7.4
  Exploitability: Unproven
Remediation Level: Official Fix
Report Confidence: Confirmed
Affected Products: For a full list of affected versions, see references below.
Technical Description:

The Java Runtime Environment (JRE) versions 7 update 13 and previous, contain two vulnerabilities that can be chained together for sandbox evasion and remote code execution in the context of the current user. One of the vulnerabilities exists in the implementation of certain classes in the package com.sun.jmx.mbeanserver and IBM previously provided coverage for this vulnerability via the signature Java_MBean_Code_Execution. This ealier signature was documented in IBM X-Force Alert # 459.

The vulnerability CVE-2013-1486 is what we are adding coverage for in today's update. This is a vulnerability in com.sun.jmx.mbeanserver.Introspector class and it allows access to restricted methods. This can be chained with the vulnerability in com.sun.jmx.mbeanserver or another vulnerability and can be used to call methods of the restricted classes to bypass the Java sandbox. Public exploits for this vulnerability are available and it is being actively exploited in the wild. Oracle has released a patch which fixes both of these vulnerabilities.


Remediation: Refer to Oracle Critical Patch Update for patch, upgrade or suggested workaround information. See References.



Revision History

1.0 Initial publication.

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