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McAfee Security Bulletin - McAfee Agent update fixes an Information Disclosure vulnerability (CVE-2019-3599)
Security Bulletins ID:   SB10271
Last Modified:  5/14/2019


First Published: February 26, 2019
 Impact of Vulnerability: Information Leak / Disclosure (CWE-717, OWASP 2004:A6)
 CVE ID: CVE-2019-3599
 Severity Rating: Medium
 CVSS v3 Base/Temporal Scores: 6.5 / 6.0
 Recommendations: Upgrade to McAfee Agent (MA) 5.6.1
 Security Bulletin Replacement: None
 Affected Software: MA 5.6.0, 5.5.x, 5.0.x
 Location of updated software: http://www.mcafee.com/us/downloads/downloads.aspx
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Article contents: Vulnerability Description
This vulnerability only affects MA when remote logging is enabled. This option is disabled by default.

McAfee Agent offers the ability for the ePolicy Orchestrator (ePO) administrator to enable remote logging on targeted endpoints to aid troubleshooting. This option is disabled by default. McAfee strongly recommends that remote logging is only enabled as required, and then returned to the disabled state.

Information Disclosure vulnerability in remote logging (which is disabled by default) in McAfee Agent (MA) 5.x allows remote unauthenticated users to access sensitive information via remote logging when it is enabled.

This update moves the remote logging functionality to a secured channel, limiting log access to the ePO administrators through the ePO console.
To remediate this issue:
  • Users of MA 5.6.0 should upgrade to 5.6.1.
  • Users of MA 5.5.1 and MA 5.5.0 should upgrade to 5.6.1. Or, you can upgrade to MA 5.5.4 when it becomes available.
  • Users of MA 5.0.x should upgrade to 5.6.1. Or, you can upgrade to MA 5.5.4 when it becomes available.
Go to the Product Downloads site, and download the applicable product update file:
Product Version Type File Name Release Date
MA 5.6.1 Update MA561WIN.zip
May 14, 2019
MA 5.5.4 Update   To Be Determined
Download and Installation Instructions
See KB56057 for instructions on how to download McAfee products, documentation, updates, 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.
Remote logging is disabled by default. You can check the status and disable the functionality through the ePO console:
  1. Go to the assigned policy type General for the product McAfee Agent.
  2. Go to Logging tab.
  3. Disable Enable remote access to log.
You are not vulnerable if the Enable remote access to log policy option is disabled. This option is disabled by default.  

If you want to continue to use the feature in older versions, configure your firewalls to limit access to the debugging port to those internal machines that require access.

McAfee recommends that you only enable this feature when troubleshooting and then disable it when you are finished.
McAfee credits Khair Alhamad and Ph055a for independently reporting this flaw. 
Frequently Asked Questions (FAQs)
How do I know if my McAfee product is vulnerable or not?
For Windows Endpoint products:
Use the following instructions for endpoint or client-based products:
  1. Right-click the McAfee tray shield icon on the Windows taskbar.
  2. Select About. The product version displays.
For McAfee Agent (command line):
Use the following instructions for endpoint or client-based products:
  1. Open a terminal.
  2. Enter the following command:
    • For Linux: /opt/McAfee/agent/bin/cmdagent -i
    • For Mac: /Library/McAfee/agent/bin/cmdagent -i
    • For Windows: C:\Program Files\McAfee\Agent\cmdagent -i

    The product version displays in the output.
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, 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 the successful exploitation of the issue being scored.
What are the CVSS scoring metrics?

CVE-2019-3599: Information Disclosure Vulnerability 
Base Score 6.5
Attack Vector (AV) Network (N)
Attack Complexity (AC) Low (L)
Privileges Required (PR) None (N)
User Interaction (UI) Required (R)
Scope (S) Unchanged (U)
Confidentiality (C) High (H)
Integrity (I) None (N)
Availability (A) None (N)
Temporal Score (Overall) 6.0
Exploitability (E) Functional (F)
Remediation Level (RL) Official Fix (O)
Report Confidence (RC) Confirmed (C)
NOTE: The below CVSS version 3.0 vector was used to generate this score.

Where can I find a list of all Security Bulletins?
All Security Bulletins are published on our external PSIRT website at http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > Security Bulletins. Security Bulletins are retired (removed) once a product is both End of Sale and End of Support (End of Life).
How do I report a product vulnerability to McAfee?
If you have information about a security issue or vulnerability with a McAfee product, visit the McAfee PSIRT website for instructions at http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > Report a Security Vulnerability.
How does McAfee respond to this and any other reported security flaws?
Our key priority is the security of our customers. If a vulnerability is found within any McAfee software or services, we work closely with the relevant security software development team to ensure the rapid and effective development of a fix and communication plan.
McAfee only publishes Security Bulletins if they include something actionable such as a workaround, mitigation, version update, or hotfix. Otherwise, we would simply be informing the hacker community that our products are a target, putting our customers at greater risk. For products that are updated automatically, a non-actionable Security Bulletin might be published to acknowledge the discoverer.
View our PSIRT policy on the McAfee PSIRT website at http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > About PSIRT.
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.
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 preceding 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 canceled at any time.

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