A vulnerability in Sun Java System Web Server may allow improper HTTP header injection, HTTP response splitting attacks and unauthorized access to resources.

This issue can occur in the following releases:

SPARC Platform

• Sun Java System Web Server 6.1 without Service Pack 8
• Sun Java System Web Server 6.1 without patch 116648-20
• Sun Java System Web Server 7.0 without Update 1
• Sun Java System Web Server 7.0 without patch 125437-07

x86 Platform

• Sun Java System Web Server 6.1 without Service Pack 8
• Sun Java System Web Server 6.1 without patch 116649-20
• Sun Java System Web Server 7.0 without Update 1
• Sun Java System Web Server 7.0 without patch 125438-07

Linux

• Sun Java System Web Server 6.1 without Service Pack 8
• Sun Java System Web Server 6.1 without patch 118202-12
• Sun Java System Web Server 7.0 without Update 1
• Sun Java System Web Server 7.0 without patch 125439-07

Windows

• Sun Java System Web Server 6.1 without Service Pack 8
• Sun Java System Web Server 6.1 without patch 121524-04
• Sun Java System Web Server 7.0 without Update 1
• Sun Java System Web Server 7.0 without patch 125441-06

HP-UX

• Sun Java System Web Server 6.1 without Service Pack 8
• Sun Java System Web Server 6.1 without patch 121510-04
• Sun Java System Web Server 7.0 without Update 1
• Sun Java System Web Server 7.0 without patch 125440-01

AIX

• Sun Java System Web Server 6.1 without Service Pack 8

Note: Other versions of the above listed applications are not affected by this issue.

To determine the version of Sun Java System Web Server 6.1 on a system, the following command can be run:

    $ <WS-install>/https-<host>/start -version

(Where <WS-install> is the installation directory of the Web Server and <host> should be the actual host name on which the Web Server is installed).

To determine the version of Sun Java System Web Server 7.0 on a system, the following command can be run:

    $ <WS-install>/bin/wadm --version

(Where <WS-install> is the installation directory of the Web Server).

This issue can occur when a 'redirect' Server Application Function (SAF) is set to use the 'url-prefix' parameter along with the 'escape' parameter being set to 'no', or an 'Error' directive is set to use the 'url-prefix' parameter in 'obj.conf' file.

There are no predictable symptoms that would indicate the described issue has been exploited.

To avoid this issue until an upgrade can be applied, edit the 'obj.conf' in the Webserer instance's 'config' directory to ensure the following:

1. If you use the redirect SAF's url-prefix parameter, do not specify escape="no".
2. Never use the url-prefix parameter in an 'Error' directive.

Safe examples:

    NameTrans fn="redirect" from="/oldurl" url="/newurl" escape="no"
    NameTrans fn="redirect" from="/oldprefix" url-prefix="/newprefix"
    Error fn="redirect" from="/oldurl" url="/newurl"

Unsafe examples:

    NameTrans fn="redirect" from="/oldprefix" url-prefix="/newprefix" escape="no"
    Error fn="redirect" from="/oldprefix" url-prefix="/newprefix"
    Error fn="redirect" from="/oldprefix" url-prefix="/newprefix" escape="yes"

(By default, the 'escape' parameter is set to "yes". If the 'obj.conf' file is modified, the Webserver instance should be restarted).

This issue is addressed in the following releases:

SPARC Platform

• Sun Java System Web Server 6.1 with Service Pack 8 or later
• Sun Java System Web Server 6.1 with patch 116648-20 or later
• Sun Java System Web Server 7.0 with Update 1 or later
• Sun Java System Web Server 7.0 with patch 125437-07 or later

x86 Platform

• Sun Java System Web Server 6.1 with Service Pack 8 or later
• Sun Java System Web Server 6.1 with patch 116649-20 or later
• Sun Java System Web Server 7.0 with Update 1 or later
• Sun Java System Web Server 7.0 with patch 125438-07 or later

Linux

• Sun Java System Web Server 6.1 with Service Pack 8 or later
• Sun Java System Web Server 6.1 with patch 118202-12 or later
• Sun Java System Web Server 7.0 with Update 1 or later
• Sun Java System Web Server 7.0 with patch 125439-07 or later

Windows

• Sun Java System Web Server 6.1 with Service Pack 8 or later
• Sun Java System Web Server 6.1 with patch 121524-04 or later
• Sun Java System Web Server 7.0 with Update 1 or later
• Sun Java System Web Server 7.0 with patch 125441-06 or later

HP-UX

• Sun Java System Web Server 6.1 with Service Pack 8 or later
• Sun Java System Web Server 6.1 with patch 121510-04 or later
• Sun Java System Web Server 7.0 with Update 1 or later
• Sun Java System Web Server 7.0 with patch 125440-01 or later

AIX

• Sun Java System Web Server 6.1 with Service Pack 8 later

Sun Java System Web Server 6.1 Service Pack 8 is available at

http://www.sun.com/download/products.xml?id=4694392a

Sun Java System Web Server 7.0 Update 1 is available at

http://www.sun.com/download/products.xml?id=467713d6

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