Note: This is an archival copy of Security Sun Alert 244992 as previously published on http://sunsolve.sun.com.|
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1019742.1.
Date of Resolved Release
A Buffer Overflow Vulnerability in the Java Runtime Environment (JRE) "Unpack200" JAR Unpacking Utility May Lead to Escalation of Privileges
A buffer overflow vulnerability in the Java Runtime Environment (JRE) with unpacking applets and Java Web Start applications using the "unpack200" JAR unpacking utility may allow an untrusted applet or application to escalate privileges. For example, an untrusted 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, "regenrecht" working with the iDefense VCP http://labs.idefense.com/vcp/
2. Contributing Factors
This issue can occur in the following Java SE and Java SE for Business releases for Solaris, Windows and Linux:
To determine the default version of the JRE that Internet Explorer uses:
To determine the default version of the JRE that Mozilla or Firefox browsers use, visit the URL "about:plugins".
The browser will display a page called "Installed plug-ins" which lists the version of the Java Plug-in, as in the following example:
Java(TM) Plug-in 1.5.0_11-b03
(Indicating that the JRE version the browser uses is 1.5.0_11).
There are no predictable symptoms that would indicate the described issue has been exploited.
There is no workaround for this issue. Please see the Resolution section below.
This issue is addressed in the following Java SE and Java SE for Business releases for Solaris, Windows and Linux:
JDK 6 Update 11:
JRE 6 Update 11:
and through the Java Update tool for Microsoft Windows users.
JDK 6 Update 11 for Solaris is available in the following patches:
JDK 5.0 Update 17 for Solaris is available in the following patches:
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 the system. To remove old affected versions on the Windows platform, please see:
For more information on Security Sun Alerts, see 1009886.1.
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Sun Java Standard Edition (Java SE)
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