First Published: October 8, 2019
 

Impact of Vulnerability:	CVE-2019-3652 - Code Injection (CWE-94) CVE-2019-3653 - Improper Access Control (CWE-287) CVE-2020-7251 - Improper Access Control (CWE-287)
CVE ID:	CVE-2019-3652 CVE-2019-3653 CVE-2020-7251
Severity Rating:	CVE-2019-3652: Medium CVE-2019-3653: Medium CVE-2020-7251: Medium
CVSS v3 Base/Temporal Scores:	CVE-2019-3652: 5.0 / 4.3 CVE-2019-3653: 5.0 / 4.3 CVE-2020-7251: 5.0 / 4.3
Recommendations:	Install or update to one of the following Endpoint Security (ENS) versions: ENS 10.7.0 February 2020 Update ENS 10.6.1 February 2020 Update ENS 10.5.5 October 2019 Update
Security Bulletin Replacement:	Update to CVE-2019-3653 for ENS 10.6.1.
Affected Software:	ENS for Windows: 10.7.x 10.6.x 10.5.x
Location of updated software:	http://www.mcafee.com/us/downloads/downloads.aspx

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Article contents:

• Vulnerability Description
• Remediation
• Acknowledgments
• Frequently Asked Questions (FAQs)
• Resources
• Disclaimer

Vulnerability Description
This Security Bulletin covers three vulnerabilities in ENS. To exploit these vulnerabilities, an attacker would need to gain access to the system.

The initial fix for this issue in CVE-2019-3653 did not prevent an older version of the ESConfig Tool from modifying the configuration for later versions. CVE-2020-7251 addresses this issue for ENS 10.6.1 and 10.7.0.

1. CVE-2019-3652 - ENS code injection in EPSetup.exe
   Code Injection vulnerability in EPSetup.exe in McAfee Endpoint Security (ENS) prior to 10.6.1 October 2019 Update allows local user to get their malicious code installed by the ENS installer via code injection into EPSetup.exe by an attacker with access to the installer.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-3652  
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3652
    
2. CVE-2019-3653 - ESConfig Tool access not controlled
   Improper access control vulnerability in configuration tool in McAfee Endpoint Security (ENS) prior to 10.6.1 October 2019 Update allows local user to disable security features via unauthorized use of the configuration tool.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-3653  
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3653
    
3. CVE-2020-7251 - ESConfig Tool able to edit configuration for newer versions
   Improper access control vulnerability in configuration tool in McAfee Endpoint Security (ENS) prior to 10.6.1 February 2020 Update allows local user to disable security features via unauthorized use of the configuration tool from older versions of ENS.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7251  
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7251

Remediation
To remediate these issues:

• Customers using ENS 10.7.x should update to ENS 10.7.0 February 2020 Update.
• Customers using ENS 10.6.x should either upgrade to ENS 10.7.0 February 2020 Update or update to ENS 10.6.1 February 2020 Update.
• Customers using ENS 10.5.x should update to ENS 10.5.5 October 2019 update, or upgrade to ENS 10.6.1 October 2019 update.

Go to the Product Downloads site, and download the applicable product update files:
 

Product	Version	Type	Release Date	Restart Needed?
ENS for Windows	10.7.0 February 2020 Update	Update	February 13, 2020	No
ENS for Windows	10.6.1 February 2020 Update	Update	February 13, 2020	No
ENS for Windows	10.5.5 October 2019 Update	Update	October 8, 2019	No

 
Download and Installation Instructions
See KB56057 for instructions to download McAfee products, documentation, updates, and hotfixes. See the Release Notes and the Installation Guide, which you can download from the Documentation tab, for instructions to install these updates.
Acknowledgments
CVE-2019-3652: McAfee credits Russell Wells from DRS for reporting this flaw.
CVE-2019-3653: McAfee credits Donny Maasland from Fox-IT for reporting this flaw.
Frequently Asked Questions (FAQs)
How do I know if my McAfee product is vulnerable?
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 taskbar.
2. Click Open Console.
3. In the console, select Action Menu.
4. In the Action Menu, select Product Details. The product version displays.

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 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?

1. CVE-2019-3652 - ENS code injection in EPSetup.exe
    

   Base Score	5.0
   Attack Vector (AV)	Local (L)
   Attack Complexity (AC)	High (H)
   Privileges Required (PR)	Low (L)
   User Interaction (UI)	Required (R)
   Scope (S)	Changed (C)
   Confidentiality (C)	Low (L)
   Integrity (I)	Low (L)
   Availability (A)	Low (L)
   Temporal Score (Overall)	4.3
   Exploitability (E)	Proof-of-Concept (P)
   Remediation Level (RL)	Official Fix (O)
   Report Confidence (RC)	Reasonable (R)

    
   NOTE: The below CVSS version 3.0 vector was used to generate this score.
   https://nvd.nist.gov/cvss/v3-calculator?vector=AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L/E:P/RL:O/RC:R
    
2. CVE-2019-3653 - ESConfig Tool access not controlled
    

   Base Score	5.0
   Attack Vector (AV)	Local (L)
   Attack Complexity (AC)	High (H)
   Privileges Required (PR)	Low (L)
   User Interaction (UI)	Required (R)
   Scope (S)	Unchanged (U)
   Confidentiality (C)	High (H)
   Integrity (I)	Low (L)
   Availability (A)	None (N)
   Temporal Score (Overall)	4.3
   Exploitability (E)	Proof-of-Concept (P)
   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.
   https://nvd.nist.gov/cvss/v3-calculator?vector=AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C
    
3. CVE-2020-7251 - ESConfig Tool able to edit configuration for newer version
    

   Base Score	5.0
   Attack Vector (AV)	Local (L)
   Attack Complexity (AC)	High (H)
   Privileges Required (PR)	Low (L)
   User Interaction (UI)	Required (R)
   Scope (S)	Unchanged (U)
   Confidentiality (C)	High (H)
   Integrity (I)	Low (L)
   Availability (A)	None (N)
   Temporal Score (Overall)	4.3
   Exploitability (E)	Proof-of-Concept (P)
   Remediation Level (RL)	Official Fix (O)
   Report Confidence (RC)	Reasonable (R)

    
   NOTE: The below CVSS version 3.1 vector was used to generate this score.
   https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C&version=3.1

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?
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 make sure 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.
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 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.