Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2022.0072
Security Bulletin - Application and Change Control update
fixes one vulnerability (CVE-2021-31833) (SB10370)
7 January 2022
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: McAfee Application and Change Control (MACC)
Publisher: McAfee
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-31833
Original Bulletin:
https://kc.mcafee.com/corporate/index?page=content&id=SB10370
- --------------------------BEGIN INCLUDED TEXT--------------------
Security Bulletins ID : SB10370
Last Modified : 12/30/2021
Summary
First Published: December 30, 2021
+-----------------+---------+--------------+----------------+--------+--------+
| | | | | |CVSS |
| |Impacted | |Impact of |Severity|v3.1 |
|Product: |Versions:|CVE ID: |Vulnerabilities:|Ratings:|Base/ |
| | | | | |Temporal|
| | | | | |Scores: |
+-----------------+---------+--------------+----------------+--------+--------+
|McAfee | | |CWE-269 - | | |
|Application and |Prior to |CVE-2021-31833|Improper |High |7.1 / |
|Change Control |8.3.4 | |Privilege | |6.4 |
|(MACC) | | |Management | | |
+-----------------+---------+--------------+----------------+--------+--------+
|Recommendations: |Install or update to MACC 8.3.4 |
+-----------------+-----------------------------------------------------------+
|Security Bulletin|None |
|Replacement: | |
+-----------------+-----------------------------------------------------------+
|Location of |Product Downloads site |
|updated 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 Workaround
o Frequently Asked Questions (FAQs)
o Resources
o Disclaimer
Vulnerability Description
To exploit this the attacker would need to copy files around the target machine
and rename them. They would then need to follow some specific steps to run the
renamed files.
CVE-2021-31833
Potential product security bypass vulnerability in McAfee Application and
Change Control (MACC) prior to version 8.3.4 allows a locally logged in
attacker to circumvent the application solidification protection provided by
MACC, permitting them to run applications that would usually be prevented by
MACC. This would require the attacker to rename the specified binary to match
name of any configured updater and perform a specific set of steps, resulting
in the renamed binary to be to run.
MITRE CVE-2021-31833
NIST CVE-2021-31833
Remediation
To remediate this issue, go to the Product Downloads site , and download the
applicable product update file:
+-------+-------+------+-----------------+
|Product|Version|Type |Release Date |
+-------+-------+------+-----------------+
|MACC |8.3.4 |Update|December 28, 2021|
+-------+-------+------+-----------------+
Download and Installation Instructions
For instructions to download product updates and hotfixes, see: KB56057 - How
to download Enterprise product updates and documentation . Review the Release
Notes and the Installation Guide for instructions on how to install these
updates. All documentation is available at our Product Documentation site .
Workaround
McAfee Enterprise strongly recommends installing the updated version of MACC.
If you're not able to update, you can change the configuration through ePO to
mitigate this issue.
WARNING: This might lead to denial of execution to Microsoft and McAfee
Enterprise signed binaries if they're not whitelisted.
1. Log on to the ePO console.
2. Navigate to Policy Catalog , Solidcore , Configuration (Client) , McAfee
Default (Read Only) .
3. Duplicate the McAfee Default (Read Only) policy.
4. Open the copy you just created.
5. Navigate to Certificate configuration .
6. Change the value of Enable VTP trust check to 0 (from 1).
7. Save the policy.
8. Apply the policy to endpoints.
When you do update to the recommended version, you should undo the above
change.
Frequently Asked Questions (FAQs)
How do I know if my 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.
What is CVSS
Common Vulnerability Scoring System (CVSS) 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 .
When calculating CVSS scores, McAfee Enterprise 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 don't 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-2021-31833:
+------------------------+--------------------+
|Base Score |7.1 |
+------------------------+--------------------+
|Attack Vector (AV) |Local (L) |
+------------------------+--------------------+
|Attack Complexity (AC) |Low (L) |
+------------------------+--------------------+
|Privileges Required (PR)|Low (L) |
+------------------------+--------------------+
|User Interaction (UI) |None (N) |
+------------------------+--------------------+
|Scope (S) |Unchanged (U) |
+------------------------+--------------------+
|Confidentiality (C) |None (N) |
+------------------------+--------------------+
|Integrity (I) |High (H) |
+------------------------+--------------------+
|Availability (A) |High (H) |
+------------------------+--------------------+
|Temporal Score (Overall)|6.4 |
+------------------------+--------------------+
|Exploitability (E) |Proof-of-Concept (P)|
+------------------------+--------------------+
|Remediation Level (RL) |Official Fix (O) |
+------------------------+--------------------+
|Report Confidence (RC) |Confirmed (C) |
+------------------------+--------------------+
NOTE: This CVSS version 3.1 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 . 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 Enterprise
If you have information about a security issue or vulnerability with a McAfee
Enterprise product, go to the PSIRT website , click Report a Security
Vulnerability , and follow the instructions.
How does McAfee Enterprise 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 Enterprise 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 Enterprise 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 PSIRT website by clicking About PSIRT .
Resources
To contact Technical Support, go to the Create a Service Request page and log
on to the ServicePortal.
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 fields to
have your password and instructions emailed to you.
Disclaimer
The information provided in this Security Bulletin is provided as is without
warranty of any kind. McAfee Enterprise disclaims all warranties, either
express or implied, including the warranties of merchantability and fitness for
a particular purpose. In no event shall McAfee Enterprise or its suppliers be
liable for any damages whatsoever including direct, indirect, incidental,
consequential, loss of business profits or special damages, even if McAfee
Enterprise or its suppliers have been advised of the possibility of such
damages. Some states don't 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 shouldn't 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 aren't 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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