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Security Bulletin: Vulnerability in IBM Rational ClearCase with SSL/TLS communications (CVE-2015-5039)

Security Bulletin


IBM Rational ClearCase is vulnerable to attacks on its SSL/TLS communications due to improper validation of server certificates.

Vulnerability Details

CVEID: CVE-2015-5039
IBM Rational ClearCase Remote Client and change management integrations could allow a remote attacker to view and modify network traffic to the CCRC WAN server or change management server, due to improper hostname validation of the server SSL certificate. An attacker could exploit this vulnerability to impersonate the server or the user.
CVSS Base Score: 4.8
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

Rational ClearCase 7.1.x (all versions), 8.0 through, and 8.0.1 through

Rational ClearCase 9.0 and later are not affected.

The affected components are the following, when configured to use SSL/TLS (HTTPS) connections to a server:

  • ClearCase Remote Client (CTE, rcleartool, CMAPI)
  • Change Management Integrations (CMI) to ClearQuest, Rational Team Concert, or Jira
  • UCM/CQ OSLC-based integration (CALAMARI)
  • Base CC/CQ Integration V2 (Perl trigger based)


Install a fix pack containing fixes:

Affected version
8.0.1 through
Install Rational ClearCase Fix Pack 11 ( for 8.0.1
8.0 through
Install Rational ClearCase Fix Pack 18 ( for 8.0
Customers on extended support contracts for 7.1.x should contact Customer Support.
For 7.0.x and 7.1.x and earlier releases, IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

* 27 May 2016: Original Copy 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.


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.

[{"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Component":"ClearCase Remote Client","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"}],"Version":"8.0;;;;;;;;;;;;;;;;;;8.0.1;;;;;;;;;;","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
10 July 2018