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             AUSCERT External Security Bulletin Redistribution

                               ESB-2013.0672
           Security Bulletin: IBM InfoSphere Information Server:
          Possible session fixation vulnerability (CVE-2013-0507)
                                14 May 2013

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM InfoSphere Information
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
Impact/Access:     Unauthorised Access -- Remote with User Interaction
Resolution:        Patch/Upgrade

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21637036

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Security Bulletin: IBM InfoSphere Information Server: Possible session fixation 
vulnerability (CVE-2013-0507)

Flash (Alert)

Document information

InfoSphere Information Server

Software version:
8.1, 8.5, 8.7, 9.1

Operating system(s):
AIX, HP-UX, Linux, Solaris, Windows

Reference #:
1637036

Modified date:
2013-05-10

Abstract

Security Bulletin: IBM InfoSphere Information Server: Possible session fixation 
vulnerability (CVE-2013-0507)

Content

SUMMARY:

Information Server does not update the session identifier after a successful 
authentication. This can lead to session fixation attacks. An attacker could 
exploit this vulnerability to gain unauthorized access to the application by 
acting as the session created by a regular user.

VULNERABILITY DETAILS:

CVE ID: CVE-2013-0507

CVSS:
CVSS Base Score: 4.3
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/82397 for the 
current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

AFFECTED PRODUCTS:
IBM InfoSphere Information Server Versions 8.1, 8.5, and 8.7 running on all 
platforms.
IBM InfoSphere Information Server Version 9.1 is vulnerable on all platforms 
only when running on WebSphere Application Server version 7.0.

REMEDIATION:
The recommended solution is to apply the fix as soon as practical. Please see 
below for additional information.

Fix(es):

Important! After applying the fixes below, or if no fixes are required, 
security scanning tools may still report this as a vulnerability; however, if 
all settings were applied correctly the vulnerability is addressed and is not 
a concern.

Versions 8.0 and 8.1: Please contact IBM Support for information.

Versions 8.5, 8.7 and 9.1: For version 8.5 you must upgrade to WebSphere 
Application Server 7.0 and enable security integration in the WebSphere 
Application Server session management settings. Please contact IBM Support for 
assistance with the upgrade. For versions 8.7 or 9.1, if WebSphere Application 
Server 8.0 or 8.5 is used no issue exists. If WebSphere Application Server 7.0 
is used, you must enable security integration in the WebSphere Application 
Server session management settings.

To enable security integration:

    Login to the WebSphere Administration Integrated Solutions Console
    Click Security > Global security
    Expand Web and SIP security and select General settings
    The "Authenticate only when the URI is protected" radio button should be 
    selected
    Check "Use available authentication data when an unprotected URI is 
    accessed"
    Click Apply
    Click Servers > Server Types > WebSphere application servers
    Click the server name (for clustered configuration you must repeat this for 
    each application server in the cluster)
    Click Session management
    Check Security Integration
    Click Apply
    Save the changes and restart the application server (for clustered 
    configurations, you must update and save this setting for every 
    application server in the cluster and then restart the cluster)

For further details refer to: HTTP session management settings.

Workaround(s):
None known.

Mitigation(s):
None known.

REFERENCES:
· Complete CVSS Guide
· On-line Calculator V2
· X-Force Vulnerability Database
· CVE-2013-0507

RELATED INFORMATION:
· IBM Secure Engineering Web Portal
· IBM Product Security Incident Response Blog

CHANGE HISTORY:
· 10-May-2013: Original version published

*The CVSS Environment Score is customer environment specific and will 
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the 
Reference section of this Flash.

Note: According to the Forum of Incident Response and Security Teams (FIRST), 
the Common Vulnerability Scoring System (CVSS) is an "industry open standard 
designed to convey vulnerability severity and help to determine urgency and 
priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY 
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

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