The update brings Java up to version 1.6.0_20 and weighs in at 81.7 MB. The update claims to fix the following:
Multiple vulnerabilities in Java 1.6.0_17
Description: Multiple vulnerabilities exist in Java 1.6.0_17, the most serious of which may allow an untrusted Java applet to execute arbitrary code outside the Java sandbox. Visiting a web page containing a maliciously crafted untrusted Java applet may lead to arbitrary code execution with the privileges of the current user. These issues are addressed by updating to Java version 1.6.0_20. Further information is available via the Sun Java website at http://java.sun.com/javase/6/webnotes/ReleaseNotes.html
Visiting a web page containing a maliciously crafted untrusted Java applet may lead to an unexpected application termination or arbitrary code execution with the privileges of the current user
Description: An out of bounds memory access issue exists in the handling of mediaLibImage objects. Visiting a web page containing a maliciously crafted untrusted Java applet may lead to an unexpected application termination or arbitrary code execution with the privileges of the current user. This issue is addressed by preventing Java applets from using the com.sun.medialib.mlib package. This issue only affects the Mac OS X implementation of Java. Credit to Marc Schoenefeld of University of Bamberg for reporting this issue.
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Description: A signedness issue exists in the handling of window drawing. Visiting a web page containing a maliciously crafted untrusted Java applet may lead to an unexpected application termination or arbitrary code execution with the privileges of the current user. This issue is addressed through improved bounds checking. This issue only affects the Mac OS X implementation of Java. Credit to Jonathan Bringhurst of Northrop Grumman, and Jeffrey Czerniak for reporting this issue.
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