Security Bulletin: Vulnerability in RC4 stream cipher affects Flex System Chassis Management Module (CMM) (CVE-2015-2808)

Vulnerability Details

Summary

The RC4 "Bar Mitzvah" Attack for SSL/TLS affects Flex System Chassis Management Module (CMM).

Vulnerability Details:

CVE-ID: CVE-2015-2808

Description: The RC4 algorithm, as used in the TLS protocol and SSL protocol, could allow a remote attacker to obtain sensitive information. An attacker could exploit this vulnerability to remotely expose account credentials without requiring an active man-in-the-middle session. Successful exploitation could allow an attacker to retrieve credit card data or other sensitive information. This vulnerability is commonly referred to as "Bar Mitzvah Attack".

CVSS Base Score: 5
CVSS Temporal Score: See http://exchange.xforce.ibmcloud.com/vulnerabilities/101851 for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)

Affected products and versions

• 2PET10A
• 2PET10B
• 2PET10C
• 2PET10D
• 2PET10E
• 2PET10F
• 2PET10G
• 2PET10H
• 2PET10I
• 2PET10K
• 2PET10M
• 2PET10P
• 2PET10Q
• 2PET12D
• 2PET12E
• 2PEO12E
• 2PET12F
• 2PET12G
• 2PET12H
• 2PET12I
• 2PEO12I
• 2PET12K
• 2PEO12O
• 2PET12O
• 2PETE6L
• 2PET12P
• 2PEO12P
• 2PET12R
• 2PEO12R
• 2PETE5O

Remediation/Fixes:

None

Workarounds and Mitigations:

To disable RC4 in the chassis, put CMM into the TLS 1.2 mode or NIST 800-131A mode:

From Web:
http://pic.dhe.ibm.com/infocenter/flexsys/information/topic/com.ibm.acc.cmm.doc/cmm_ui_configure_NIST_compliance.html

From CLI:
http://pic.dhe.ibm.com/infocenter/flexsys/information/topic/com.ibm.acc.cmm.doc/cli_command_crypto.html

Note: The steps above will also change the configuration of any IMM2 or FSP in the chassis to TLS 1.2 mode or NIST 800-131A mode.

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
28 April 2015: 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.

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.