Vigil@nce: JRE, JDK, SDK, file access via BasicService
November 2008 by Vigil@nce
A Java application can use BasicService of Java Web Start in order to open a document.
Consequences: user access/rights, data reading
Means of attack: 1 attack
Ability of attacker: technician (2/4)
Confidence: multiples sources (3/5)
Diffusion of the vulnerable configuration: high (3/3)
Creation date: 03/11/2008
Java Web Start applications or applets are executed in a protected environment, and cannot access to system resources.
The BasicService class provides the showDocument() method which displays a url. However, this method does not check if the url indicates to exit from the sandbox. An applet can thus use BasicService to exit sandbox and to open a file with rights of user.
A malicious applet can therefore access to files located on victim’s computer.
Identifiers: BID-31916, CVE-2008-4910, VIGILANCE-VUL-8213