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McAfee Security Bulletin - McAfee Agent for Windows update addresses weak directory permissions (CVE-2019-3592)
Security Bulletins ID:   SB10288
Last Modified:  7/30/2019


First Published: July 8, 2019
 Impact of Vulnerability: Privilege escalation vulnerability
 CVE ID: CVE-2019-3592
 Severity Rating: High
 CVSS v3 Base/Temporal Scores: 7.2 / 6.5
 Recommendations: Install or update to McAfee Agent (MA) 5.6.1 Hotfix 3 (HF3)
 Security Bulletin Replacement: None
 Affected Software: MA for Windows 5.x before 5.6.1 HF3
 Location of updated software: http://www.mcafee.com/us/downloads/downloads.aspx

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Article contents: Vulnerability Description
When MA is installed, it includes a tool to facilitate McAfee product updates. To exploit this vulnerability, an attacker would need to gain administrator rights on the target machine and place certain files in the MA directory, preventing MA from triggering McAfee product updates. Permissions have been updated to prevent users with administrator rights from placing or modifying files in the MA directory.

Privilege escalation vulnerability in McAfee Agent (MA) before 5.6.1 HF3, allows local administrator users to potentially disable some McAfee processes by manipulating the MA directory control and placing a carefully constructed file in the MA directory.
To remediate this issue, install the hotfix shown in the table below.

Go to the Product Downloads site, and download the applicable product hotfix file:
Product Versions Type File Name Release Date
MA for Windows 5.6.1 HF3 Hotfix MA561Hotfix3WIN.zip
July 17, 2019
MA for Windows 5.5.x To Be Determined To Be Determined To Be Determined
Download and Installation Instructions
See KB56057 for instructions to download McAfee products, documentation, updates, and hotfixes. For instructions to install these updates, see the Release Notes and the Installation Guide, which you can download from the Documentation tab.
McAfee credits Edsel Valle from NSS Labs for reporting this flaw.
Frequently Asked Questions (FAQs)
How do I know if my McAfee product is vulnerable or not?
For 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 Open Console.
  3. In the console, click Action Menu.
  4. In the Action Menu, click Product Details. The product version displays.
For ePO:
Use the following instructions for ePO:
Verify the version and build of ePO that is installed. For information about how to verify the version, see: KB52634.

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, which customers can use to judge the criticality of a vulnerability 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-2019-3592: MA for Windows update addresses weak directory permissions
Base Score 7.2
Attack Vector (AV) Local (L)
Attack Complexity (AC) High (H)
Privileges Required (PR) High (H)
User Interaction (UI) Required (R)
Scope (S) Changed (C)
Confidentiality (C) High (H)
Integrity (I) High (H)
Availability (A) High (H)
Temporal Score (Overall) 6.5
Exploitability (E) Proof-of-Concept (P)
Remediation Level (RL) Official Fix (O)
Report Confidence (RC) Confirmed (C)
NOTE: The following 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) after 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?
McAfee's key priority is the security of our customers. If a vulnerability is found within any of 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 damage 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 might not apply.
Any future product release dates mentioned in this Security Bulletin are intended to outline our general product direction, and they must not be relied on in making a purchasing decision. The product release dates are for information purposes only, and must 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 can be changed or canceled at any time.

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