Security Vulnerabilities in the Java Runtime Environment (JRE) LDAP Implementation may Allow a Denial of Service (DoS) and Malicious Code to be Executed

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Security vulnerabilities in the Java Runtime Environment (JRE) LDAP implementation may allow a Denial of Service (DoS) and malicious code to be executed:

1. Impact

CR 6717680:
A security vulnerability in the Java Runtime Environment (JRE) with initializing LDAP connections may be exploited by a remote client to cause a Denial of Service (DoS) condition on the LDAP service.

CR 6737315:
A security vulnerability in Java Runtime Environment LDAP client implementation may allow malicious data from an LDAP server to cause malicious code to be unexpectedly loaded and executed on an LDAP client.

2. Contributing Factors

These issues can occur in the following Java SE and Java SE for Business releases for Windows, Solaris, and Linux:

• JDK and JRE 5.0 Update 17 and earlier
  
• JDK and JRE 6 Update 12 and earlier

and in the following Java SE for Business release for Windows, Solaris, and Linux:

• SDK and JRE 1.4.2_19 and earlier

and in the following Java SE release for Windows and Solaris:

• SDK and JRE 1.3.1_24 and earlier

To determine the version of Java installed on a system, the following command can be used:

    % java -version
    java version "1.5.0_17

To determine the default version of the JRE that Internet Explorer uses, see the following URL:

• http://java.com/en/download/installed.jsp?detect=jre&try=1

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:

    Java(TM) Platform SE 6 U11

In this example, the version of the JRE that the browser uses is 6 Update 11.

3. Symptoms

If the issue described in CR 6717680 occurs, the LDAP service may be unresponsive.
There are no reliable symptoms that would indicate the issue described in CR 6737315 has been exploited.

4. Workaround

There are no workarounds for theses issues.  Please see the Resolution section below.

5. Resolution

These issues are addressed in the following releases:

• JDK and JRE 6 Update 13 or later
• JDK and JRE 5.0 Update 18 or later
  

and in the following Java SE for Business release for Windows, Solaris, and Linux:

• SDK and JRE 1.4.2_20 or later

and in the following Java SE release for Windows and Solaris:

• SDK and JRE 1.3.1_25 or later

Java SE releases are available at:

JDK and JRE 6 Update 13:

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

JRE 6 Update 13:

• http://java.com/
• Through the Java Update tool for Microsoft Windows users

JDK 6 Update 13 for Solaris is available in the following patches:

• Java SE 6: update 13 (as delivered in patch 125136-14)
• Java SE 6: update 13 (as delivered in patch 125137-14 (64bit))
• Java SE 6_x86: update 13 (as delivered in patch 125138-14)
• Java SE 6_x86: update 13 (as delivered in patch 125139-14 (64bit))

JDK and JRE 5.0 Update 18:

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

JDK 5.0 Update 18 for Solaris is available in the following patches:

• J2SE 5.0: update 18 (as delivered in patch 118666-19)
• J2SE 5.0: update 18 (as delivered in patch 118667-19 (64bit))
• J2SE 5.0_x86: update 18 (as delivered in patch 118668-19)
• J2SE 5.0_x86: update 18 (as delivered in patch 118669-19 (64bit))
  

Java SE for Business releases are available at:

• http://www.sun.com/software/javaseforbusiness/getit_download.jsp

Note 1:  Java SE releases SDK and JRE 1.4.2 have completed the Sun End of Service Life (EOSL) process. Sun recommends that users upgrade to the latest Java SE release. Customers interested in continuing to receive critical fixes on SDK and JRE 1.4.2 are encouraged to migrate to Java SE for Business.

Note 2:  SDK and JRE 1.3.1 has completed the Sun End of Service Life (EOSL) process and is only supported for customers with Solaris 8 and Vintage Support Offering support contracts (see http://java.sun.com/j2se/1.3/download.html). Sun strongly recommends that users upgrade to the latest Java SE release.

Note 3: 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. To remove old affected versions on the Windows platform, please see:

• http://www.java.com/en/download/help/5000010800.xml

For more information on Security Sun Alerts, see Technical Instruction ID 213557.

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