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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.0512
           Security Bulletin: Samba vulnerability issue on SONAS
                     (CVE-2013-4408 and CVE-2012-6105)
                               16 April 2014

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

Product:           IBM Scale Out Network Attached Storage
Publisher:         IBM
Operating System:  Linux variants
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
                   Unauthorised Access             -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-4408 CVE-2012-6105 

Reference:         ESB-2014.0507
                   ESB-2013.1752

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004573

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Security Bulletin: Samba vulnerability issue on SONAS (CVE-2013-4408 and 
CVE-2012-6105)

Document information

More support for:
Scale Out Network Attached Storage
1.4.3.1

Version:
1.3, 1.4

Operating system(s):
Linux

Reference #:
S1004573

Modified date:
2014-04-14

Security Bulletin

Summary

An attacker could gain privileged access to SONAS system by exploiting a 
vulnerability in Samba.

Vulnerability Details

CVE ID: CVE-2013-4408 and CVE-2012-6105

DESCRIPTION: 

This issue affects only those SONAS systems that use Active Directory server 
for authentication. Configuration with other authentication server types are 
not affected by this issue.

SONAS includes a version of Samba that does not check correctly for buffer 
overflows in winbindd. This enables remote Active Directory servers to execute 
arbitrary code in the affected Samba and potentially allows privileged access 
to the SONAS system which could potentially result in system unavailability or 
unauthorized disclosures if access is not otherwise restricted.

Samba is used on the SONAS system to enable file management and authentication 
services for Microsoft Windows environments.

CVE-2013-4408
CVSS Base Score: 7.5
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/89533 for the 
current score

CVE-2012-6105
CVSS Base Score: 4.0
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/89382 for the 
current score
Affected Products and Versions
SONAS V1.3.0.0 to V1.4.2.1.
Remediation/Fixes
The fix for this issue is available beginning with SONAS V1.4.3.0. Customers 
running an earlier version of SONAS should upgrade to V1.4.3.0 or later in 
order to get these fixes.

Workarounds and Mitigations

Work-around(s): None.

Mitigation(s): Active Directory server should be maintained behind a firewall. 
Access should be restricted to approved users only.

References

Complete CVSS Guide 
On-line Calculator V2

RELATED INFORMATION: 

IBM Secure Engineering Web Portal 
IBM Product Security Incident Response Blog

Related information

IBM Secure Engineering Web Portal 
IBM Product Security Incident Response Blog

Acknowledgement

None

Change History

10 April 2014: First draft

*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 Security Bulletin.

Disclaimer

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 
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT 
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

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