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AUSCERT External Security Bulletin Redistribution
ESB-2020.3109
Endpoint Security for Windows update fixes four vulnerabilities
10 September 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Mcafee Endpoint Security
Publisher: Mcafee
Operating System: Windows
Impact/Access: Access Confidential Data -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-7323 CVE-2020-7322 CVE-2020-7320
CVE-2020-7319
Original Bulletin:
https://kc.mcafee.com/corporate/index?page=content&id=SB10327
- --------------------------BEGIN INCLUDED TEXT--------------------
McAfee Security Bulletin - Endpoint Security for Windows update fixes four
vulnerabilities (CVE-2020-7319, CVE-2020-7320, CVE-2020-7322, and
CVE-2020-7323)
Security Bulletins ID : SB10327
Last Modified : 9/8/2020
Summary
First Published: September 8, 2020
+----------------+---------+-------------+------------------+--------+--------+
| | | | | |CVSS |
| |Impacted | |Impact of |Severity|v3.1 |
|Product: |Versions:|CVE ID: |Vulnerabilities: |Ratings:|Base/ |
| | | | | |Temporal|
| | | | | |Scores: |
+----------------+---------+-------------+------------------+--------+--------+
|Endpoint |10.7.0.x | |Improper Access | |8.8 / |
|Security (ENS) |10.6.x |CVE-2020-7319|Control (CWE-284) |High |7.9 |
| |10.5.x | | | | |
+----------------+---------+-------------+------------------+--------+--------+
| |10.7.0.x | |Protection | |6.7 / |
|ENS |10.6.x |CVE-2020-7320|Mechanism Failure |Medium |6.0 |
| |10.5.x | |(CWE-693) | | |
+----------------+---------+-------------+------------------+--------+--------+
| | | |Exposure of | | |
| |10.7.0.x | |Sensitive | |4.7 / |
|ENS |10.6.x |CVE-2020-7322|Information to an |Medium |4.2 |
| |10.5.x | |Unauthorized Actor| | |
| | | |(CWE-200) | | |
+----------------+---------+-------------+------------------+--------+--------+
| |10.7.0.x | |Authentication | |6.9 / |
|ENS |10.6.x |CVE-2020-7323|Bypass (CWE-288) |Medium |6.2 |
| |10.5.x | | | | |
+----------------+---------+-------------+------------------+--------+--------+
|Recommendations:|Install or update to the latest versions listed in the |
| |Remediation section |
+----------------+------------------------------------------------------------+
|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 Acknowledgments
o Frequently Asked Questions (FAQs)
o Resources
o Disclaimer
Vulnerability Description
1. CVE-2020-7319
Improper Access Control vulnerability in McAfee Endpoint Security (ENS) for
Windows prior to 10.7.0 September 2020 Update allows local users to access
files which the user otherwise would not have access to via manipulating
symbolic links to redirect McAfee file operations to an unintended file.
https://web.nvd.nist.gov/view/vuln/detailvulnId=CVE-2020-7319
https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2020-7319
2. CVE-2020-7320
Protection Mechanism Failure vulnerability in McAfee Endpoint Security
(ENS) for Windows prior to 10.7.0 September 2020 Update allows local
administrator to temporarily reduce the detection capability allowing
otherwise detected malware to run via stopping certain Microsoft services.
https://web.nvd.nist.gov/view/vuln/detailvulnId=CVE-2020-7320
https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2020-7320
3. CVE-2020-7322
Information Disclosure Vulnerability in McAfee Endpoint Security (ENS) for
Windows prior to 10.7.0 September 2020 Update allows local users to gain
access to sensitive information via incorrectly logging of sensitive
information in debug logs.
https://web.nvd.nist.gov/view/vuln/detailvulnId=CVE-2020-7322
https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2020-7322
4. CVE-2020-7323
Authentication Protection Bypass vulnerability in McAfee Endpoint Security
(ENS) for Windows prior to 10.7.0 September 2020 Update allows physical
local users to bypass the Windows lock screen via triggering certain
detection events while the computer screen is locked and the McTray.exe is
running with elevated privileges. This issue is timing dependent and
requires physical access to the machine.
https://web.nvd.nist.gov/view/vuln/detailvulnId=CVE-2020-7323
https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2020-7323
Remediation
To remediate this issue:
o Customers on earlier ENS 10.7.0 releases: Update to ENS 10.7.0 September
2020 Update.
o Customers on earlier ENS 10.6.1 releases: Update to ENS 10.6.1 September
2020 Update, or upgrade to ENS 10.7.0 September 2020 Update.
o Customers on ENS 10.5.5 releases: Upgrade to ENS 10.6.1 September 2020
Update, or upgrade to ENS 10.7.0 September 2020 Update.
Go to the Product Downloads site and download the applicable product update
files:
+-------+----------------------------+------+-----------------+
|Product|Version |Type |Release Date |
+-------+----------------------------+------+-----------------+
|ENS |10.7.0 September 2020 Update|Update|September 8, 2020|
+-------+----------------------------+------+-----------------+
|ENS |10.6.1 September 2020 Update|Update|September 8, 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,
which you can download from the Documentation tab, for instructions on how to
install these updates.
Acknowledgments
CVE-2020-7319: McAfee credits Jakub Palaczynski (ING Tech Poland) for
responsibly reporting this flaw.
CVE-2020-7323: McAfee credits Lockheed Martin Red Team for responsibly
reporting this flaw.
Frequently Asked Questions (FAQs)
How do I know if my McAfee product is vulnerable or not
For Endpoint Security:
Use the following instructions for endpoint or client-based products:
1. Right-click the McAfee tray shield icon on the Windows taskbar.
2. Select McAfee Endpoint Security .
3. In the console, select Action Menu .
4. In the Action Menu, select About . 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-2020-7319: Improper Access Control Vulnerability in ENS for Windows
+------------------------+--------------------+
|Base Score |8.8 |
+------------------------+--------------------+
|Attack Vector (AV) |Local (L) |
+------------------------+--------------------+
|Attack Complexity (AC) |Low (L) |
+------------------------+--------------------+
|Privileges Required (PR)|Low (L) |
+------------------------+--------------------+
|User Interaction (UI) |None (N) |
+------------------------+--------------------+
|Scope (S) |Changed (C) |
+------------------------+--------------------+
|Confidentiality (C) |High (H) |
+------------------------+--------------------+
|Integrity (I) |High (H) |
+------------------------+--------------------+
|Availability (A) |High (H) |
+------------------------+--------------------+
|Temporal Score (Overall)|7.9 |
+------------------------+--------------------+
|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:L/
UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C&version=3.1
2. CVE-2020-7320: Protection Mechanism Failure in ENS for Windows
+------------------------+--------------------+
|Base Score |6.7 |
+------------------------+--------------------+
|Attack Vector (AV) |Local (L) |
+------------------------+--------------------+
|Attack Complexity (AC) |High (H) |
+------------------------+--------------------+
|Privileges Required (PR)|High (H) |
+------------------------+--------------------+
|User Interaction (UI) |None (N) |
+------------------------+--------------------+
|Scope (S) |Changed (C) |
+------------------------+--------------------+
|Confidentiality (C) |Low (L) |
+------------------------+--------------------+
|Integrity (I) |High (H) |
+------------------------+--------------------+
|Availability (A) |Low (L) |
+------------------------+--------------------+
|Temporal Score (Overall)|6.0 |
+------------------------+--------------------+
|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:H/PR:H/
UI:N/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C&version=3.1
3. CVE-2020-7322: Exposure of Sensitive Information in ENS for Windows
+------------------------+--------------------+
|Base Score |4.7 |
+------------------------+--------------------+
|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) |Low (L) |
+------------------------+--------------------+
|Integrity (I) |Low (L) |
+------------------------+--------------------+
|Availability (A) |Low (L) |
+------------------------+--------------------+
|Temporal Score (Overall)|4.2 |
+------------------------+--------------------+
|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:H/PR:H/
UI:R/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C&version=3.1
4. CVE-2020-7323: Authentication Protection Bypass vulnerability in ENS for
Windows
+------------------------+--------------------+
|Base Score |6.9 |
+------------------------+--------------------+
|Attack Vector (AV) |Physical (P) |
+------------------------+--------------------+
|Attack Complexity (AC) |High (H) |
+------------------------+--------------------+
|Privileges Required (PR)|None (N) |
+------------------------+--------------------+
|User Interaction (UI) |Required (R) |
+------------------------+--------------------+
|Scope (S) |Changed (C) |
+------------------------+--------------------+
|Confidentiality (C) |High (H) |
+------------------------+--------------------+
|Integrity (I) |High (H) |
+------------------------+--------------------+
|Availability (A) |Low (L) |
+------------------------+--------------------+
|Temporal Score (Overall)|6.2 |
+------------------------+--------------------+
|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:P/AC:H/PR:N/
UI:R/S:C/C:H/I:H/A:L/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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