US CERT - SA08-193A Java Vulnerabilities

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National Cyber Alert System

Cyber Security Alert SA08-193A

Sun Updates for Multiple Vulnerabilities

Original release date: July 11, 2008

Last revised: --

Source: US-CERT

Systems Affected

Sun Java Runtime Environment versions

* JDK and JRE 6 Update 6 and earlier

* JDK and JRE 5.0 Update 16 and earlier

* SDK and JRE 1.4.2_17 and earlier

* SDK and JRE 1.3.1_22 and earlier

Overview

By convincing you to visit a malicious website, an attacker could use a

vulnerability in Sun Java to gain control of your computer. You may

have

Java on your computer without even realizing it.

Solution

Apply an update from Sun

Sun has released updates that fix these vulnerabilities. As illustrated

on

the Java website, follow these instructions to update your version of

Java:

1. From the Start menu, open the Control Panel.

2. Click the Java icon to open the Java Control Panel. (If you do not

see

the icon, Java is probably not installed on your computer.)

3. Select the Update tab and click the Update Now button. (If you do not

see an Update tab, your version of Java does not support updates, or

you

must log in as an Administrator.)

We also recommend enabling Automatic Updates for Java. To enable

Automatic

Updates, go to the Update tab of the Java Control Panel and select the

Check for Updates Automatically check box.

Leaving older versions of Java on your computer after the update could

expose you to security risks. You may want to remove the older versions

by

following Sun's instructions.

Disable Java

We recommend that users disable Java in their web browser. Disabling

Java

in your web browser will not fix the vulnerability, but it may prevent

an

attacker from being able to take advantage of it. Instructions for

disabling Java are available in the Securing Your Web Browser document.

Description

Vulnerabilities in Sun Java may allow an attacker to access your

computer,

install and run malicious software on your computer, or cause your

computer to crash. An attacker could exploit these vulnerabilities by

convincing you to view a malicious web document.

For more technical information, see US-CERT Technical Alert TA08-193A.

References

* US-CERT Technical Cyber Security Alert TA08-193A -

<http://www.us-cert.gov/cas/techalerts/TA08-193A.html>

* What is Java Update? -

<http://www.java.com/en/download/help/5000020700.xml>

* Securing Your Web Browser -

<http://www.us-cert.gov/reading_room/securing_browser/>

____________________________________________________________________

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

<http://www.us-cert.gov/cas/alerts/SA08-193A.html>

____________________________________________________________________

Feedback can be directed to US-CERT Technical Staff. Please send

email to <cert@cert.org> with "SA08-193A Feedback VU#827003" in the

subject.

____________________________________________________________________

For instructions on subscribing to or unsubscribing from this

mailing list, visit <http://www.us-cert.gov/cas/signup.html>.

____________________________________________________________________

Produced 2008 by US-CERT, a government organization.

Terms of use:

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

____________________________________________________________________

Revision History

July 11, 2008: Initial release

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