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AUSCERT External Security Bulletin Redistribution
ESB-2020.3548
McAfee Active Response and MVISION EDR vulnerabilities
15 October 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: McAfee Active Response (MAR)
McAfee MVISION Endpoint Detection and Response (EDR)
Publisher: McAfee
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Virtualisation
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-7327 CVE-2020-7326
Original Bulletin:
https://kc.mcafee.com/corporate/index?page=content&id=SB10331
- --------------------------BEGIN INCLUDED TEXT--------------------
McAfee Security Bulletin - McAfee Active Response and MVISION EDR update fixes
CVE-2020-7326 and CVE-2020-7327 vulnerabilities
Security Bulletins ID : SB10331
Last Modified : 10/13/2020
Summary
First Published: October 13, 2020
+----------------+---------+-------------+------------------+--------+--------+
| | | | | |CVSS |
| |Impacted | |Impact of |Severity|v3.1 |
|Product: |Versions:|CVE ID: |Vulnerabilities: |Ratings:|Base/ |
| | | | | |Temporal|
| | | | | |Scores: |
+----------------+---------+-------------+------------------+--------+--------+
| | | |Improperly | | |
|McAfee Active |MAR prior|CVE-2020-7326|Implemented |Medium |6.0 / |
|Response (MAR) |to 2.4.4 | |Security Check for| |5.4 |
| | | |Standard (CWE-358)| | |
+----------------+---------+-------------+------------------+--------+--------+
|McAfee MVISION |MVISION | |Improperly | | |
|Endpoint |EDR prior|CVE-2020-7327|Implemented |Medium |6.0 / |
|Detection and |to 3.2.0 | |Security Check for| |5.4 |
|Response (EDR) | | |Standard (CWE-358)| | |
+----------------+---------+-------------+------------------+--------+--------+
|Highest CVSS |6.0 (Medium) |
|v3.1 Base Score:| |
+----------------+------------------------------------------------------------+
|Recommendations:|Install or update to MAR 2.4.4.404 and MVISION EDR |
| |3.2.0.567. |
+----------------+------------------------------------------------------------+
|Security | |
|Bulletin |None |
|Replacement: | |
+----------------+------------------------------------------------------------+
|Location of | |
|updated |http://www.mcafee.com/us/downloads/downloads.aspx |
|software: | |
+----------------+------------------------------------------------------------+
To receive email notification when this Security Bulletin is updated, click
Subscribe on the right side of the page. You must be logged on to subscribe.
Article contents:
o Vulnerability Description
o Remediation
o Frequently Asked Questions (FAQs)
o Resources
o Disclaimer
Vulnerability Description
1. CVE-2020-7326
Improperly implemented security check in McAfee Active Response (MAR) prior
to 2.4.4 may allow local administrators to execute malicious code via
stopping a core Windows service leaving McAfee core trust component in an
inconsistent state resulting in MAR failing open rather than closed.
https://web.nvd.nist.gov/view/vuln/detailvulnId=CVE-2020-7326
https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2020-7326
2. CVE-2020-7327
Improperly implemented security check in McAfee MVISION Endpoint Detection
and Response Client (MVISION EDR) prior to 3.2.0 may allow local
administrators to execute malicious code via stopping a core Windows
service leaving McAfee core trust component in an inconsistent state
resulting in MVISION EDR failing open rather than closed.
https://web.nvd.nist.gov/view/vuln/detailvulnId=CVE-2020-7327
https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2020-7327
Remediation
o Customers using MAR should update to MAR 2.4.4.404.
o Customers using MVISION EDR should have been automatically updated to a
protected version. You should be using MVISION EDR 3.2.0.567 or later.
To remediate this issue, go to the Product Downloads site , and download the
applicable product update file:
+-----------+---------+------+----------------+
|Product |Version |Type |Release Date |
+-----------+---------+------+----------------+
|MAR |2.4.4.404|Update|October 13, 2020|
+-----------+---------+------+----------------+
|MVISION EDR|3.2.0.567|Minor |August 11, 2020 |
+-----------+---------+------+----------------+
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 for
instructions on how to install these updates. All documentation is available at
https://docs.mcafee.com .
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, select Action Menu .
4. In the Action Menu, select Product Details . The product version displays.
For ePO/server products:
Use the following instructions for server-based products:
o Check the version and build of ePO that is installed. For information on
how to check the version, see KB52634 .
o Create a query in ePO for the product version of the product installed
within your organization.
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 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 that customers can use to judge how critical a
vulnerability is and plan accordingly. For more information, visit the CVSS
website at: https://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-2020-7326: MAR - Improperly implemented security check
+------------------------+--------------------+
|Base Score |6.0 |
+------------------------+--------------------+
|Attack Vector (AV) |Local (L) |
+------------------------+--------------------+
|Attack Complexity (AC) |Low (L) |
+------------------------+--------------------+
|Privileges Required (PR)|High (H) |
+------------------------+--------------------+
|User Interaction (UI) |None (N) |
+------------------------+--------------------+
|Scope (S) |Unchanged (U) |
+------------------------+--------------------+
|Confidentiality (C) |None (N) |
+------------------------+--------------------+
|Integrity (I) |High (H) |
+------------------------+--------------------+
|Availability (A) |High (H) |
+------------------------+--------------------+
|Temporal Score (Overall)|5.4 |
+------------------------+--------------------+
|Exploitability (E) |Proof-of-Concept (P)|
+------------------------+--------------------+
|Remediation Level (RL) |Official Fix (O) |
+------------------------+--------------------+
|Report Confidence (RC) |Confirmed (C) |
+------------------------+--------------------+
NOTE: The below CVSS version 3.1 vector was used to generate this score.
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculatorvector=AV:L/AC:L/PR:H/
UI:N/S:U/C:N/I:H/A:H/E:P/RL:O/RC:C&version=3.1
2. CVE-2020-7327: MVISION EDR - Improperly implemented security check
+------------------------+--------------------+
|Base Score |6.0 |
+------------------------+--------------------+
|Attack Vector (AV) |Local (L) |
+------------------------+--------------------+
|Attack Complexity (AC) |Low (L) |
+------------------------+--------------------+
|Privileges Required (PR)|High (H) |
+------------------------+--------------------+
|User Interaction (UI) |None (N) |
+------------------------+--------------------+
|Scope (S) |Unchanged (U) |
+------------------------+--------------------+
|Confidentiality (C) |None (N) |
+------------------------+--------------------+
|Integrity (I) |High (H) |
+------------------------+--------------------+
|Availability (A) |High (H) |
+------------------------+--------------------+
|Temporal Score (Overall)|5.4 |
+------------------------+--------------------+
|Exploitability (E) |Proof-of-Concept (P)|
+------------------------+--------------------+
|Remediation Level (RL) |Official Fix (O) |
+------------------------+--------------------+
|Report Confidence (RC) |Confirmed (C) |
+------------------------+--------------------+
NOTE: The below CVSS version 3.1 vector was used to generate this score.
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculatorvector=AV:L/AC:L/PR:H/
UI:N/S:U/C:N/I:H/A:H/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 https://
www.mcafee.com/us/threat-center/product-security-bulletins.aspx . To see
Security Bulletins for McAfee Enterprise products on this website click
Enterprise 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 https://
www.mcafee.com/us/threat-center/product-security-bulletins.aspx . To report an
issue, click 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 https://www.mcafee.com/us/
threat-center/product-security-bulletins.aspx by clicking 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 :
o If you are a registered user, type your User ID and Password, and then
click Log In .
o 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
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The University of Queensland
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Internet Email: auscert@auscert.org.au
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