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.
|Adjusted Temporal Score:
||Proof of Concept|
||For a full list of affected versions, see references below.|
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.
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