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AUSCERT External Security Bulletin Redistribution
ESB-2007.0753 -- [Win][Linux][Solaris]
Multiple Security Vulnerabilities in Java Web Start Relating
to Local File Access
5 October 2007
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AusCERT Security Bulletin Summary
---------------------------------
Product: JDK and JRE 6 Update 2 and prior
JDK and JRE 5.0 Update 12 and prior
SDK and JRE 1.4.2_15 and prior
Publisher: Sun Microsystems
Operating System: Windows
Linux variants
Solaris
Impact: Modify Arbitrary Files
Access Confidential Data
Access: Remote/Unauthenticated
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-103073-1
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Sun(sm) Alert Notification
* Sun Alert ID: 103073
* Synopsis: Multiple Security Vulnerabilities in Java Web Start
Relating to Local File Access
* Category: Security
* Product: Java 2 Platform, Standard Edition
* BugIDs: 6590813, 6590827, 6590837, 6590850
* Avoidance: Patch, Upgrade, Workaround
* State: Resolved
* Date Released: 03-Oct-2007
* Date Closed: 03-Oct-2007
* Date Modified:
1. Impact
A vulnerability in Java Web Start may allow an untrusted
application to read local files that are accessible to the user
running the untrusted application.
Two vulnerabilities in Java Web Start may allow an untrusted
application to read and write local files that are accessible to the
user running the untrusted application.
Three vulnerabilities in Java Web Start may allow an untrusted
application to determine the location of the Java Web Start cache.
Sun acknowledges with thanks, Peter Csepely, for bringing these issues
to our attention.
2. Contributing Factors
The first issue listed can occur in Java Web Start in the
following releases for the Windows 32-bit platform:
* JDK and JRE 5.0 Update 12 and earlier
* SDK and JRE 1.4.2_15 and earlier
Note: Java Web Start in JDK and JRE 6 and later is not affected.
The next two issues listed can occur in Java Web Start in the
following releases (for Windows, Solaris, and Linux):
* JDK and JRE 6 Update 2 and earlier
Note: Java Web Start in releases prior to JDK and JRE 6 are not
affected.
The final three issues listed can occur in Java Web Start in the
following releases (for Windows, Solaris, and Linux):
* JDK and JRE 6 Update 2 and earlier
* JDK and JRE 5.0 Update 12 and earlier
* SDK and JRE 1.4.2_15 and earlier
Note: SDK and JRE 1.3.1 or earlier are not affected by any of the
issues mentioned in this Sun Alert.
To determine the default version of the JRE that Internet Explorer
uses:
1. Click "Tools" in the Menu Bar at the top of the browser
2. Select "Sun Java Console"
3. The first two lines in the console displays the version of Java
Plug-in and 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 such as the following:
Java(TM) Plug-in 1.5.0_11-b03
This above example indicates that the version of the JRE that the
browser uses is 1.5.0_11.
3. Symptoms
There are no predictable symptoms that would indicate the described
issues have been exploited.
4. Relief/Workaround
To reduce the likelihood of executing untrusted applications which may
allow these issues to be exploited, Java Web Start applications may be
disabled temporarily (until the updates or patches have been
installed) as follows:
For Internet Explorer (Windows):
1. Right click on the "Start" button and select "Explore"
2. In the "Start Menu" window, select "Tools" => "Folder Options"
3. From the "Folder Options" window, select the "File Types" tab
4. From the "Registered File Types" window, scroll down and locate
the "JNLP - JNLP File"
5. Select the "JNLP - JNLP File" and click the "Delete" button
For Mozilla:
1. Select "Preferences" under the browser's "Edit" menu
2. In the "Preferences" window, select "Helper Applications" located
under the "Navigator" category
3. Under "Files types", scroll down and locate
"application/x-java-jnlp-file"
4. Select "application/x-java-jnlp-file" and click the "Remove"
button
Note 1: On Microsoft Windows, applications may also be launched from
the desktop icon or Start Menu if a shortcut was previously created
for an application. Unknown applications should not be launched
through the desktop icon or the Start Menu. Shortcuts can be removed
by using the Java Web Start Application Manager through the
"Application/Remove Shortcut" menu item. For more information, see:
http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/ov
erview.html#jws
Note 2: It is also possible to launch applications through the command
line in Windows, Solaris, and Linux. Unknown applications should not
be launched through the command line. Sites may consider renaming the
Java Web Start launcher ("javaws.exe" for Windows and "javaws" for
Solaris and Linux) to prevent Java Web Start from launching.
The launcher can be found at:
Windows:
JDK and JRE 6:
C:\Program Files\Java\jre1.6.0_03\bin\javaws.exe
JDK and JRE 5:
C:\Program Files\Java\jre1.5.0_13\bin\javaws.exe
SDK and JRE 1.4.2:
C:\Program Files\Java\j2re1.4.2_16\javaws\javaws.exe
Solaris (if installed using pkg):
/usr/bin/javaws
Linux (if installed using rpm):
/usr/java/jre1.5.0/bin/javaws
5. Resolution
The first issue listed is addressed in the following releases (for
Windows 32-bit platform):
* JDK and JRE 5.0 Update 13 or later
* SDK and JRE 1.4.2_16 or later
The next two issues listed are addressed in the following releases
(for Windows, Solaris, and Linux):
* JDK and JRE 6 Update 3 or later
The final three issues listed are addressed in the following
releases (for Windows, Solaris, and Linux):
* JDK and JRE 6 Update 3 or later
* JDK and JRE 5.0 Update 13 or later
* SDK and JRE 1.4.2_16 or later
JDK and JRE 6 Update 3 is available for download at the following
links:
http://java.sun.com/javase/downloads/index.jsp
http://java.com
JDK 6 Update 3 for Solaris is available in the following patches:
* Java SE 6 update 3 (as delivered in patch 125136-04 or later)
* Java SE 6 update 3 (as delivered in patch 125137-04 or later
(64bit))
* Java SE 6_x86 update 3 (as delivered in patch 125138-04 or
later)
* Java SE 6_x86 update 3 (as delivered in patch 125139-04 or
later (64bit))
JDK and JRE 5.0 Update 13 is available for download at the following
link:
http://java.sun.com/javase/downloads/index_jdk5.jsp
JDK 5.0 Update 13 for Solaris is available in the following patches:
* J2SE 5.0 update 13 (as delivered in patch 118666-14)
* J2SE 5.0 update 13 (as delivered in patch 118667-14 (64bit))
* J2SE 5.0_x86 update 13 (as delivered in patch 118668-14)
* J2SE 5.0_x86 update 13 (as delivered in patch 118669-14
(64bit))
SDK and JRE 1.4.2 for Solaris 8 is available for download at:
http://java.sun.com/j2se/1.4.2/download.html
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 your system. To remove old affected versions on the
Windows platform, please see:
http://java.com/en/download/help/uninstall_java.xml
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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