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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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