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Security Bulletin: Vulnerability in RC4 stream cipher affects IBM FlashSystem 840 and IBM FlashSystem V840, -AE1 models. (CVE-2015-2808)

Security Bulletin


Summary

The RC4 “Bar Mitzvah” Attack for SSL/TLS affects the IBM FlashSystem 840.

Vulnerability Details

CVEID: 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 https://exchange.xforce.ibmcloud.com/vulnerabilities/101851 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)

Affected Products and Versions

IBM FlashSystem 840:
Machine Type 9840, model -AE1 (all supported releases)
Machine Type 9843, model -AE1 (all supported releases)

IBM FlashSystem V840:
Machine Type 9846, model -AE1 (all supported releases)
Machine Type 9848, model -AE1 (all supported releases)

All available code levels.

Remediation/Fixes

Product

VRMFAPARRemediation/First Fix
FlashSystem 840 MTMs:

9840-AE1,

9843-AE1

9840 MTMs:

9846-AE1 &

9849-AE1

A code fix is now available. The VRMF of this code level is 1.1.3.8 (or later). NoneThis vulnerability has been remediated in firmware version 1.1.3.8.


You should verify applying this fix does not cause any compatibility issues. The fix disables any use of the RC4 stream cipher when interfacing to the IBM FlashSystem 840 -- and does not allow it to be re-enabled. IBM recommends that you review your entire environment to identify other areas where you have enabled the RC4 stream cipher and take appropriate mitigation and remediation actions.

For firmware versions released earlier than 1.1.3.8, IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Link to FlashSystem 840 fixes

Workarounds and Mitigations

Although IBM recommends that you install a level of code with a fix for this vulnerability, you can mitigate, although not eliminate, your risk until you have done so by ensuring that all users who have access to the system are authenticated by another security system such as a firewall.

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References

Off

Acknowledgement

None

Change History

17 April 2015: 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.

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Document Information

Modified date:
17 February 2023

UID

ssg1S1005217