Java AtomicReferenceArray Sandbox Evasion and Code Execution

Notification Type: IBM Security Protection Alert
Notification Date: April 20, 2012
Notification Version: 1.0
   
Name: Java AtomicReferenceArray Sandbox Evasion and Code Execution
Public disclosure/
In the wild date:		 January 17, 2012
Aliases: CVE-2011-3571
Risk: High
CVE: CVE-2012-0507
Description:

The Java Runtime Environment (JRE) versions 7 update 2 and previous as well as version 6 update 30 and previous contain a vulnerability that can be exploited for sandbox evasion and remote code execution in the context of the current user.  The vulnerability is in the implementation of the AtomicReferenceArray class that allows type safety checks to be circumvented to bypass the Java sandbox.  Publicly exploits for this vulnerability are available and it is being actively exploited in the wild.  This vulnerability was fixed in the February 2012 update to the JRE and a April 6th update for Mac OS.  All Java installations should immediately apply this update if they have not done so already.

Note:
In order for this signature to be detected the tuning parameter "pam.content.jar.decompress" must be enabled in order to analyze code inside JAR files.

 

ISS Coverage
Product Content Version
Proventia Network IDS
Proventia Network IPS
Proventia Network MFS
Proventia Server (Linux)
RealSecure Network
RealSecure Server Sensor		 32.041
Proventia Desktop
Proventia Server IPS (Windows)		 2755
Propagation Techniques ISS Protection Available

remote exploit

 Java_Sandbox_Breach_Dos*
  20 Apr 2012

* This signature is NOT blocked by default. X-Force recommends that this signature be enabled for monitoring and set to block only after evaluating in your environment.

 

Detailed Description
Business Impact:

This security update resolves a publicly disclosed vulnerability in a component of the Oracle Virtualization Virtual Desktop Infrastructure (VDI). The vulnerability could allow remote code execution if a user visits a website containing specially crafted content designed to exploit the vulnerability. An attacker would use a drive-by download exploit kit (currently they are using this vulnerability to target out-of-date Windows and Mac OS computers) or would have to convince users to visit the website, typically by getting them to click a link in an email message or Instant Messenger message that takes them to the attacker's website.

*CVSS Base Score: 9.3
  Access Vector: Network
Access Complexity: Medium
Authentication: None
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete
Adjusted Temporal Score: 7.7
  Exploitability: Functional
Remediation Level: Official-Fix
Report Confidence: Confirmed
Affected Products: For a full list of affected versions, see references below.
Technical Description:

The vulnerability is in the implementation of the AtomicReferenceArray class that allows type safety checks to be circumvented to bypass the Java sandbox.  Publicly exploits for this vulnerability are available and it is being actively exploited in the wild on both Windows and Mac OS.  This vulnerability was fixed in the February 2012 update to the JRE on non-Apple platforms, and in an April 6th update for Mac OS. All Java installations should immediately apply this update if they have not done so already.

Note:
In order for this signature to be detected the tuning parameter "pam.content.jar.decompress" must be enabled in order to analyze code inside JAR files.

Remediation: A patch is available for multiple platforms, see references below for details.

References
XFDB: http://xforce.iss.net/xforce/xfdb/72513
Apple: http://support.apple.com/kb/HT5228?viewlocale=it_IT&locale=it_IT
Oracle: http://www.oracle.com/technetwork/topics/security/javacpufeb2012-366318.html

Revision History
1.0 Initial publication.

* 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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