Two vulnerabilities related to serialization in the Java Runtime Environment may independently allow an untrusted applet or application to elevate its privileges.

Sun acknowledges, with thanks, Tom Hawtin, for bringing these issues to our attention.

These issues can occur in the following releases (for Windows, Solaris, and Linux):

• JDK and JRE 5.0 Update 7 and earlier
• SDK and JRE 1.4.2_12 and earlier

Note: SDK and JRE 1.3.x are not affected.

To determine the default version of the JRE on a system for Solaris and Linux, the following command can be run:

    % java -version

Note: The above command only determines the default version. Other versions may also be installed on the system.

To determine the default version of the JRE on a system for Windows:

1. Click "Start"
2. Select "Run"
3. Type "cmd" (starts a command-line)
4. At the prompt, type "java -version"

Note: The above command only determines the default version. Other versions may also be installed on the system.

There are no reliable symptoms that would indicate the described issue has been exploited.

There is no workaround.

These issues are addressed in the following releases (for Windows, Solaris, and Linux):

• JDK and JRE 5.0 Update 8 or later
• SDK and JRE 1.4.2_13 or later

Note: JRE 5.0 Update 8 for Solaris was also delivered in the following patches:

• J2SE 5.0: update 8 (as delivered in patch 118666-07)
• J2SE 5.0: update 8 (as delivered in patch 118667-07 (64bit))
• J2SE 5.0_x86: update 8 (as delivered in patch 118668-07)
• J2SE 5.0_x86: update 8 (as delivered in patch 118669-07 (64bit))

The latest releases for J2SE are available for download at:

J2SE 5.0:

• http://java.sun.com/javase/downloads/index_jdk5.jsp
• http://java.com

J2SE 5.0 Update 9 for Solaris is also available in the following patches:

• J2SE 5.0: update 9 (as delivered in patch 118666-09)
• J2SE 5.0: update 9 (as delivered in patch 118667-09 (64bit))
• J2SE 5.0_x86: update 9 (as delivered in patch 118668-09)
• J2SE 5.0_x86: update 9 (as delivered in patch 118669-09 (64bit))

J2SE 1.4.2 is available for download at:

• http://java.sun.com/j2se/1.4.2/download.html

Note: When installing a new version of the product from a source other than a Solaris patch, it is recommended that the old affected versions be removed from your system. For more information, please see the installation notes on the respective java.sun.com download pages.

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