* 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.
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.
|Adjusted Temporal Score:
||For a full list of affected versions, see references below.|
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.
||Refer to Oracle Critical Patch Update for patch, upgrade or suggested workaround information. See References.|
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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