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Vigil@nce: JRE, JDK, SDK, file access via BasicService

November 2008 by Vigil@nce

SYNTHESIS

A Java application can use BasicService of Java Web Start in order to open a document.

Gravity: 2/4

Consequences: user access/rights, data reading

Provenance: document

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

IMPACTED PRODUCTS

- Java JRE/JDK
- Java JRE/JDK/J2SE
- Java JRE/SDK
- Java JRE/SDK/J2SE

DESCRIPTION

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.

CHARACTERISTICS

Identifiers: BID-31916, CVE-2008-4910, VIGILANCE-VUL-8213

http://vigilance.fr/vulnerability/8213




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