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

Security Bulletin


Summary

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

Vulnerability Details

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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 https://exchange.xforce.ibmcloud.com/vulnerabilities/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.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Off

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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Internal Use Only

  • 7.0.x systems are only vulnerable in the Perl-based trigger integration with CQ. No customers on support contracts use this integration.
  • PSIRT # 1841 Record # 39659

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Document Information

Modified date:
10 July 2018

UID

swg21677285

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