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HistoryMar 05, 2019 - 12:59 p.m.

Security Bulletin: Vulnerability in RC4 stream cipher affects IBM Personal Communications (CVE-2015-2808)

2019-03-0512:59:26
www.ibm.com
36

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

Summary

The RC4 “Bar Mitzvah” Attack for SSL/TLS affects IBM Personal Communications.

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 Personal Communications versions: 6.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.0.5, 6.0.6, 6.0.7, 6.0.8, 6.0.9, 6.0.10, 6.0.11, 6.0.12, 6.0.13, 6.0.14

Remediation/Fixes

None

Workarounds and Mitigations

Enable FIPS mode for the secure connection in order to automatically disable the RC4 ciphers.

Steps to enable FIPS mode:

1. Select “Communication -> Configure…” menu item.

$26BB2E81A9C5F26D.jpg

2. Click “Link Parameters…” button. $189AE46F1C7A9E4E.jpg

3. Select “Enable FIPS Mode (TLS Protocol only)” check box from “Security Setup” tab. $121AD5899AA28873.jpg

You should verify applying this configuration change does not cause any compatibility issues. Not disabling the RC4 stream cipher will expose yourself to the attack described above. 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.

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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

10 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

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”:“SSEQ5Y”,“label”:“Personal Communications”},“Business Unit”:{“code”:“BU054”,“label”:“Systems w/TPS”},“Component”:“General Information”,“Platform”:[{“code”:“PF033”,“label”:“Windows”}],“Version”:“6.0;6.0.1;6.0.2;6.0.3;6.0.4;6.0.5;6.0.6;6.0.7;6.0.8;6.0.9;6.0.10;6.0.11;6.0.12;6.0.13;6.0.14”,“Edition”:“”,“Line of Business”:{“code”:“LOB17”,“label”:“Mainframe TPS”}},{“Product”:{“code”:“SSEQ5Y”,“label”:“Personal Communications”},“Business Unit”:{“code”:“BU054”,“label”:“Systems w/TPS”},“Component”:" “,“Platform”:[{“code”:”“,“label”:”“}],“Version”:”“,“Edition”:”",“Line of Business”:{“code”:“LOB17”,“label”:“Mainframe TPS”}}]

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

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