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                         National Cyber Alert System

                   Technical Cyber Security Alert TA07-022A


Sun Updates for Multiple Vulnerabilities in Java

   Original release date: January 22, 2007
   Last revised: --
   Source: US-CERT


Systems Affected

   Sun Java Runtime Environment versions

     * JDK and JRE 5.0 Update 9 and earlier
     * SDK and JRE 1.4.2_12 and earlier
     * SDK and JRE 1.3.1_18 and earlier


Overview

   The Sun Java Runtime Environment contains multiple vulnerabilities
   that can allow a remote, unauthenticated attacker to execute arbitrary
   code on a vulnerable system.


I. Description

   The Sun Java Runtime Environment (JRE) allows users to run Java
   applications in a browser or as standalone programs. Sun has released
   updates to the Java Runtime Environment software to address multiple
   vulnerabilities. Further details about these vulnerabilities are
   available in the Vulnerability Notes Database.

   Note that exploit code is publicly available for at least one of these
   vulnerabilities.


II. Impact

   By convincing a user to run a specially crafted Java application, a
   remote, unauthenticated attacker can execute arbitrary code on a
   vulnerable system. A common attack vector would be a web page that
   contains a Java applet.


III. Solution

Apply an update from Sun

   These issues are addressed in the following versions of the Sun Java
   Runtime environment:

     * JDK and JRE 5.0 Update 10 or later
     * SDK and JRE 1.4.2_13 or later
     * SDK and JRE 1.3.1_19 or later

   If you install the latest version of Java, older versions of Java may
   remain installed on your computer. If these versions of Java are not
   needed, you may wish to remove them. For instructions on how to remove
   older versions of Java, refer to the following instructions from Sun:

      http://www.java.com/en/download/faq/5000070400.xml


Disable Java

   Disable Java in your web browser, as specified in the Securing Your
   Web Browser document. While this does not fix the underlying
   vulnerabilities, it does block the most common attack vector.


IV. References

     * US-CERT Vulnerability Note VU#388289 -
       <http://www.kb.cert.org/vuls/id/388289>

     * US-CERT Vulnerability Note VU#102289 -
       <http://www.kb.cert.org/vuls/id/102289>

     * US-CERT Vulnerability Note VU#149457 -
       <http://www.kb.cert.org/vuls/id/149457>

     * US-CERT Vulnerability Note VU#939609 -
       <http://www.kb.cert.org/vuls/id/939609>

     * Securing Your Web Browser -
       <http://www.us-cert.gov/reading_room/securing_browser/>

     * CVE-2007-0243 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0243>

     * CVE-2006-6745 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6745>

     * CVE-2006-6731 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6731>

     * Java SE Technologies at a Glance -
       <http://java.sun.com/javase/technologies/>

     * Java SE Security -
       <http://java.sun.com/javase/technologies/security/index.jsp>

     * Can I remove older versions of the JRE after installing a newer
       version? - <http://www.java.com/en/download/faq/5000070400.xml>

 ____________________________________________________________________

   The most recent version of this document can be found at:

     <http://www.us-cert.gov/cas/techalerts/TA07-022A.html>
 ____________________________________________________________________

   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert@cert.org> with "TA07-022A Feedback VU#388289" in the
   subject.
 ____________________________________________________________________

   For instructions on subscribing to or unsubscribing from this
   mailing list, visit <http://www.us-cert.gov/cas/signup.html>.
 ____________________________________________________________________

   Produced 2007 by US-CERT, a government organization.

   Terms of use:

     <http://www.us-cert.gov/legal.html>
 ____________________________________________________________________


Revision History

  January 22, 2007: Initial release
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