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McAfee Security Bulletin: Network Data Loss Prevention update fixes CVE-2015-2808 and CVE-2008-5161
Security Bulletins ID:   SB10163
Last Modified:  4/7/2017

Summary

First Published: 8/18/2016
 
 Impact of Vulnerability:  SSL RC4 Cipher Suites Supported
 SSH Server CBC Mode Ciphers Enabled
CVE Information
 CVE Numbers:  Severity Rating  Base / Overall CVSS 3.0 Scores:
 CVE-2015-2808  Medium  6.3/ 5.4
 CVE-2008-5161  Low  2.2 / 2.0
 Recommendations:  Apply Network Data Loss Prevention (NDLP) Hotfix hotfix_1146411_47740_01.tar.gz to NDLP 9.3.4.1
 Security Bulletin Replacement:  None   
 Affected Software:  NDLP 9.3.4.1 and later
 Location of Updated Software:  http://www.mcafee.com/us/downloads/downloads.aspx

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Article contents:
 

Description

Typically, the NDLP Management Console is deployed on a trusted network and will have access granted only on an as-needed basis. Data Loss Prevention tools are typically among an organization's most sensitive systems and should be restricted as such. Before updating the software with the fixes, customers are advised to configure a typical system and network access controls (see the Workaround section below).
 
When access to NDLP is restricted appropriately, this vulnerability poses a reduced security risk because access should be restricted to trusted insiders.
 
Scenario 1 (CVE-2015-2808): SSL RC4 Cipher Suites Supported
 
A critical vulnerability was discovered in the Rivest Cipher 4 (RC4) software stream cipher. In cryptography, RC4 is one of the most used software-based stream ciphers in the world. The cipher is included in popular Internet protocols such as Transport Layer Security (TLS). It is a very simple cipher when compared to competing algorithms of the same strength and boasts one of the fastest speeds of the same family of algorithms. It is estimated to protect as much as 30% of SSL traffic. Though it is a popular binary additive stream cipher, it suffers a long known (13 year old) vulnerability known as Invariance Weakness.
 
Scenario 2 (CVE-2008-5161): SSH Server CBC Mode Ciphers Enabled
 
The SSH server is configured to support Cipher Block Chaining (CBC) encryption. This may allow an attacker to recover the plaintext message from the cipher text.
 
CVE-2015-2808: SSL RC4 Cipher Suites Supported
The RC4 algorithm, as used in the TLS protocol and SSL protocol, does not properly combine state data with key data during the initialization phase, which makes it easier for remote attackers to conduct plaintext-recovery attacks against the initial bytes of a stream by sniffing network traffic that occasionally relies on keys affected by the Invariance Weakness, and then using a brute-force approach involving LSB values, also known as the "Bar Mitzvah" issue.
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-2808
 
CVE-2008-5161: SSH Server CBC Mode Ciphers Enabled
Error handling in the SSH protocol in (1) SSH Tectia Client and Server and Connector 4.0 through 4.4.11, 5.0 through 5.2.4, and 5.3 through 5.3.8; Client and Server and ConnectSecure 6.0 through 6.0.4; Server for Linux on IBM System z 6.0.4; Server for IBM z/OS 5.5.1 and earlier, 6.0.0, and 6.0.1; and Client 4.0-J through 4.3.3-J and 4.0-K through 4.3.10-K; and (2) OpenSSH 4.7p1 and possibly other versions, when using a block cipher algorithm in Cipher Block Chaining (CBC) mode, makes it easier for remote attackers to recover certain plaintext data from an arbitrary block of ciphertext in an SSH session via unknown vectors.
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-5161
 
Affected NDLP Components:
  • McAfee DLP Manager
  • McAfee DLP Monitor
  • McAfee DLP iPrevent
  • McAfee DLP iDiscover
NOTE: Data Loss Prevention Endpoint (DLP Endpoint) is not affected by this issue.

Remediation

These issues are resolved in NDLP Hotfix hotfix_1146411_47740_01.tar.gz released on August 25, 2016 for all NDLP platforms.

Go to the Product Downloads site and download the applicable product hotfix file:
 
Product Major Version Hotfix Number Hotfix File Name Release Date
NDLP            9.3.4.1 Hotfix-9.3.4.1.1 hotfix_1146411_47740_01.tar.gz August 25, 2016
 
Download and Installation Instructions
See KB56057 for instructions on how to download McAfee products, documentation, security updates, patches, and hotfixes. Review the Release Notes and the Installation Guide, which you can download from the Documentation tab, for instructions on how to install these updates.

Workaround

Before upgrading to NDLP Hotfix hotfix_1146411_47740_01.tar.gz, McAfee strongly recommends that you configure system and network access controls to the following best practices:
  • Change the default root password of the system to a strong, un-guessable password.
  • Place the NDLP Management Console only on a trusted network.
  • Only give accounts on NDLP systems to personnel with a "need-to-know".
  • Place network restrictions such that only NDLP Monitors can communicate with NDLP Managers.
  • Use only a single network interface card (NIC) for inter-system communications.
  • Present management functions on only a single NIC. The management NIC should accept connections only from a trusted, restricted network.

Mitigations

No vulnerability detection signatures are available.

Acknowledgements

None.

Frequently Asked Questions (FAQs)

How do I know whether my McAfee product is vulnerable or not?

For Endpoint products:
Use the following instructions for endpoint or client based products:
  1. Right-click on the McAfee tray shield icon on the Windows task bar.
  2. Select Open Console.
  3. In the console, select Action Menu.
  4. In the Action Menu, select Product Details. The product version is displayed.
For Appliances:
Use the following instructions for Appliance based products:
  1. Open the Administrator's User Interface (UI).
  2. Click the About link. The product version is displayed.
What is CVSS?
CVSS, or Common Vulnerability Scoring System, is the result of the National Infrastructure Advisory Council’s effort to standardize a system of assessing the criticality of a vulnerability. This system offers an unbiased criticality score between 0 and 10 that customers can use to judge how critical a vulnerability is and plan accordingly. For more information, please visit the CVSS website at: http://www.first.org/cvss/.

When calculating CVSS scores, McAfee has adopted a philosophy that fosters consistency and repeatability. Our guiding principle for CVSS scoring is to score the exploit under consideration by itself. We consider only the immediate and direct impact of the exploit under consideration. We do not factor into a score any potential follow-on exploits that might be made possible by successful exploitation of the issue being scored
 
What are the CVSS scoring metrics that have been used?
 
CVE-2015-2808: SSL RC4 Cipher Suites Supported

NOTE: This vulnerability is addressed by removing support for the RC4 cipher.
 
 Base Score 6.3
 Attack Vector (AV) Network Access
 Attack Complexity (AC) Low
 Privileges Required (PR) Low
 User Interaction (UI) None
 Scope (S) Unchanged
Confidentiality (C) Low
Integrity (I) Low
Availability (A) Low
 Temporal Score (Overall) 5.4
 Exploitability (E) Functional
 Remediation Level (RL) Official fix
 Report Confidence (RC) Un-known

NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:F/RL:O/RC:U

CVE-2008-5161: SSH Server CBC Mode Ciphers Enabled

NOTE:
This vulnerability is addressed by removing support of CBC cipher from the SSH config file.
 
 Base Score 2.2
 Attack Vector (AV) Network Access
 Attack Complexity (AC) High
 Privileges Required (PR) High
 User Interaction (UI) None
 Scope (S) Unchanged
Confidentiality (C) None
Integrity (I) None
Availability (A) Low
 Temporal Score (Overall) 2.0
 Exploitability (E) Functional
 Remediation Level (RL) Official fix
 Report Confidence (RC) Un-known

NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L/RL:O/RC:U

Where can I find a list of all security bulletins or how do I report a product vulnerability?
To find a list of all security bulletins, or if you have information about a security issue or vulnerability with a McAfee product, please visit our product security website at: http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx.

Resources

To contact Technical Support, log on to the ServicePortal and go to the Create a Service Request page at https://support.mcafee.com/ServicePortal/faces/serviceRequests/createSR:
  • If you are a registered user, type your User Id and Password, and then click Log In.
  • If you are not a registered user, click Register and complete the required fields. Your password and logon instructions will be emailed to you.

Disclaimer

The information provided in this security bulletin is provided as is without warranty of any kind. McAfee disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall McAfee or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits, or special damages, even if McAfee or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
 
Any future product release dates mentioned in this security bulletin are intended to outline our general product direction and they should not be relied on in making a purchasing decision. The product release dates are for information purposes only, and may not be incorporated into any contract. The product release dates are not a commitment, promise, or legal obligation to deliver any material, code, or functionality. The development, release, and timing of any features or functionality described for our products remains at our sole discretion and may be changed or cancelled at any time.

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