BeanShell: Arbitrary code execution

Background

BeanShell is a small, free, embeddable Java source interpreter with object scripting language features, written in Java.

Description

An application that includes BeanShell on the classpath may be vulnerable if another part of the application uses Java serialization or XStream to deserialize data from an untrusted source.

Impact

Remote attackers could execute arbitrary code including shell commands.

Workaround

There is no known workaround at this time.

Resolution

All BeanShell users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --verbose --oneshot ">=dev-java/bsh-2.0_beta6"