Security Bulletin: Vulnerability in IBM Rational ClearCase (GSKit component) with potential for TLS Attack (CVE-2013-0169)

Summary

The IBM GSKit component used in Rational ClearCase is susceptible to a Transport Layer Security protocol (used in HTTPS) vulnerability known as “Lucky Thirteen.” The vulnerability might allow remote attackers to conduct distinguishing and plain-text recovery attacks by statistically analyzing timing data for crafted packets.

Vulnerability Details

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CVE ID: CVE-2013-0169

**Description:**The IBM GSKit component used in Rational ClearCase is susceptible to a Transport Layer Security protocol (used in HTTPS) vulnerability known as “Lucky Thirteen.” The vulnerability might allow remote attackers to conduct distinguishing and plain-text recovery attacks by statistically analyzing timing data for crafted packets.

The IBM GSKit is used if ClearCase on Windows platforms is configured to integrate with IBM Rational ClearQuest with communication over SSL (https). This applies to Base CC/CQ integrations using Change Management Interface (CMI) and to UCM-enabled CQ integration via OSLC. If your ClearCase deployment is not using these integrations with ClearQuest, or not using SSL with the integrations, then your deployment is not sensitive to this attack. The UCM-enabled CQ integration without using OSLC (SQUID) is not sensitive to this attack.

If your deployment does not use ClearCase on Windows, it is not sensitive to this attack.

CVSS Base Score: 4.3 **CVSS Temporal Score:**See <https://exchange.xforce.ibmcloud.com/vulnerabilities/81902&gt; for the current score *CVSS Environmental Score:**Undefined CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Products and Versions

Rational ClearCase 7.1 through 7.1.2.11, 8.0 through 8.0.0.7, and 8.0.1

Remediation/Fixes

Upgrade to one of the below versions of IBM Rational ClearCase

• Rational ClearCase Fix Pack 1 (8.0.1.1) for 8.0.1
• Rational ClearCase Fix Pack 8 (8.0.0.8) for 8.0
• 7.1.2.12: Upgrade to 8.0.0.8 or 8.0.1.1

Workarounds and Mitigations

None