Java Web Start

Notification Type: IBM Internet Security Systems Protection Alert
Notification Date: April 20, 2010
Notification Version: 1.0
Name: Java Web Start
Public disclosure/
In the wild date:
April 09, 2010
Aliases: CVE-2010-1423
CVE: CVE-2010-1423
Description: Java Web Start, a Java feature for launching and installing applications, has a design flaw allowing arbitrary commands to be passed directly to the Java Virtual Machine.


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

Unauthorized Access Attempt

Suspicious Activity




 20 Apr 2010

Detailed Description

Business Impact:

Sun JRE could allow a remote attacker to execute arbitrary commands on the system, caused by the improper validation of input by the launch method in the Java Deployment Toolkit ActiveX control and NPAPI plugin. By persuading a victim to visit a specially-crafted Web page, an attacker could pass arbitrary command line arguments to javaws to download and execute a malicious JAR file placed on a network share.

*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: 6.9
  Exploitability: Proof of Concept
Remediation Level: Official Fix
Report Confidence: Uncorroborated
Affected Products: For a full list of affected versions, see references below.
Technical Description:

Java Web Start, a Java feature for launching and installing applications, has a design flaw allowing arbitrary commands to be passed directly to the Java Virtual Machine. The key issue relates to insufficient string validation for paths presented to the JNLP handler, javaws/Linux and javaws.exe/Windows. There are multiple approaches to instantiate the JNLP handler with an arbitrary string, including HTML, DHTML and ActiveX. In the wild, it is being actively abused to download and run malicious executables. However, it is also possible to specify an arbitrary remote library to execute. This native code library is supposed to be an alternate Java Virtual Machine but a lack of validation allows malware instead.


Patches are available. See References for details.



Revision History

1.0 Initial publication.

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