Two buffer overflow vulnerabilities in the Java Runtime Environment may independently allow an untrusted applet to elevate its privileges. For example, an applet may grant itself permissions to read and write local files or execute local applications that are accessible to the user running the untrusted applet.

Sun acknowledges, with thanks, Chris Evans, 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
• SDK and JRE 1.3.1_18 and earlier

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 issues have 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
• SDK and JRE 1.3.1_19 or later

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 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

J2SE 1.3.1 is available for download at:

• http://java.sun.com/j2se/1.3/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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