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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1628
        Security Bulletin: XML entity expansion vulnerabilities in
                         ClearCase (CVE-2014-3090)
                             19 September 2014

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

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

Product:           IBM Rational ClearCase
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-3090  

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21677285

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Security Bulletin: XML entity expansion vulnerabilities in ClearCase 
(CVE-2014-3090)

Security Bulletin

Document information

More support for:

Rational ClearCase

CCRC WAN Server

Software version:

7.1, 7.1.0.1, 7.1.0.2, 7.1.1, 7.1.1.1, 7.1.1.2, 7.1.1.3, 7.1.1.4, 7.1.1.5, 
7.1.1.6, 7.1.1.7, 7.1.1.8, 7.1.1.9, 7.1.2, 7.1.2.1, 7.1.2.2, 7.1.2.3, 7.1.2.4,
7.1.2.5, 7.1.2.6, 7.1.2.7, 7.1.2.8, 7.1.2.9, 7.1.2.10, 7.1.2.11, 7.1.2.12, 
7.1.2.13, 7.1.2.14, 8.0, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.0.6,
8.0.0.7, 8.0.0.8, 8.0.0.9, 8.0.0.10, 8.0.0.11, 8.0.1, 8.0.1.1, 8.0.1.2, 8.0.1.3, 
8.0.1.4

Operating system(s):

AIX, HP-UX, Linux, Solaris, Windows

Reference #:

1677285

Modified date:

2014-09-17

Summary

IBM Rational ClearCase is vulnerable to XML entity expansion attacks. These 
attacks could cause a denial of service.

Vulnerability Details

CVE ID: CVE-2014-3090

Description: IBM Rational ClearCase is vulnerable to XML entity expansion 
attacks. A malicious server could exhaust process memory on a client. A 
malicious client could cause denial of service on a server.

The vulnerable components are:

    CCRC WAN Server / CM Server

    Perl CC/CQ integration trigger scripts (clients)

    CMAPI Java interface (clients)

    ClearCase remote client

    CMI and OSLC-based ClearQuest integrations (clients)


CVSS Base Score: 5.0

CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/94256 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

IBM Rational ClearCase is vulnerable to a denial of service, caused by the 
failure to properly detect recursion during entity expansion by the XML parser. 
A remote attacker could exploit this vulnerability using a specially crafted 
XML document containing a large number of nested entity references to consume 
all available memory resources.

Affected Products and Versions

ClearCase version					Status

8.0.1 through 8.0.1.4					Affected

8.0 through 8.0.0.11					Affected

7.1.2 through 7.1.2.14					Affected

7.1.0.x, 7.1.1.x (all versions and fix packs)		Affected

7.0.x							Not affected

Remediation/Fixes

The solution is to upgrade to a newer fix pack of ClearCase.

Affected Versions	Applying the fix
8.0.1.x			Install Rational ClearCase Fix Pack 4 (8.0.1.5) for 8.0.1

8.0.0.x			Install Rational ClearCase Fix Pack 11 (8.0.0.12) for 8.0

7.1.2.x			Install Rational ClearCase Fix Pack 14 (7.1.2.15) for 7.1.2

7.1.1.x
7.1.0.x			Install Rational ClearCase Fix Pack 14 (7.1.2.15) for 7.1.2
		
Note: 7.1.2.14 inter-operates with all 7.1.1.x systems, and can be installed in 
the same way as 7.1.1.x fix packs.

Workarounds and Mitigations

Disable the Perl trigger based ClearCase/ClearQuest integration until you apply 
the fixes to clients. Disable the CMI and OSLC-based CQ integrations until you 
apply the fixes to clients.

Disable CCRC WAN server until you apply the fixes to servers.

References

Complete CVSS Guide

On-line Calculator V2

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Acknowledgement

None

Change History

* 17 September 2014: 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 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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