Hash: SHA256

             AUSCERT External Security Bulletin Redistribution

McAfee Security Bulletin - Status and updates for Linux sudo vulnerability
                             19 February 2021


        AusCERT Security Bulletin Summary

Product:           McAfee Web Gateway
Publisher:         McAfee
Operating System:  Network Appliance
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-3156  

Reference:         ESB-2021.0408

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

McAfee Security Bulletin - Status and updates for Linux sudo vulnerability

Security Bulletins ID   : SB10348

Last Modified           : 2/16/2021


First Published: February 11, 2021

Recent updates to this article
| Date              | Update                                                  |
|                   | Updated the "Vulnerable and Updated" section with MWG   |
| February 16, 2021 | 10.0.4, 9.2.8, and 8.2.17.                              |
|                   | Updated the "Not Vulnerable" section with SIEM          |
|                   | Appliance Data Monitor (ADM).                           |

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.
| CVE Information:                                                            |
| Impact of                | Low - see the description section below          |
| Vulnerabilities:         |                                                  |
|               |          | CVSS  |                        |                 |
| CVE IDs       | Severity | v3.1  | Affected Products      | Impact of       |
|               | Rating   | Base  |                        | Vulnerabilities |
|               |          | Score |                        |                 |
|               |          |       | See the McAfee Product | CWE-269 -       |
| CVE-2021-3156 | High     | 7.8   | Vulnerability Status   | Privilege       |
|               |          |       | table below            | escalation      |
| Highest CVSS v3.1 Base   | 7.8                                              |
| Score:                   |                                                  |
| Recommendations:         | Deploy the fixes as they are made available.     |
| Security Bulletin        | None                                             |
| Replacement:             |                                                  |
| Affected Models:         | See the McAfee Product Vulnerability Status      |
|                          | table below for platform details.                |
| Location of updated      | http://www.mcafee.com/us/downloads/              |
| software:                | downloads.aspx                                   |

Article contents:

  o Vulnerability Description
  o McAfee Product Vulnerability Status
  o Remediation
  o Frequently Asked Questions (FAQs)
  o Resources
  o Disclaimer

Vulnerability Description
This sudo vulnerability affects Linux-based appliances and virtual machines.
McAfee products are listed in the table below with their current status. A
detailed description of the vulnerability can be found on the Red Hat security
bulletin - https://access.redhat.com/security/cve/CVE-2021-3156 .

Some appliance products are listed as "Vulnerable and Not Exploitable - Update
Planned". The reasoning for this status is:

  o A vulnerable version of the sudo rpm is installed as part of the McAfee
    appliance image.
  o The appliance is designed to be managed through the user interface, not the
  o The CLI is configured to have only one user allowed to log on. This user is
    typically used to access through SSH and then changed to the root user. As
    such the sudo vulnerability is unlikely to be exploitable.

Sudo before 1.9.5p2 has a Heap-based Buffer Overflow, allowing privilege
escalation to root via " sudoedit -s " and a command-line argument that ends
with a single backslash character.
McAfee Product Vulnerability Status
This Security Bulletin will be updated as additional information is available.
|Update Availability                                     |
|Product                                         |Version|
|Vulnerable and Updated                                  |
|                                                |10.0.4 |
|McAfee Web Gateway (MWG)                        |9.2.8  |
|                                                |8.2.17 |
|Not Vulnerable                                          |
|Network Security Manager (NSM) Linux            |All    |
|Network Security Platform (NSP)                 |All    |
|Network Threat Behavior Analysis (NTBA)         |All    |
|SIEM Appliance Data Monitor (ADM)               |All    |
|SIEM Enterprise Security Manager                |All    |
|Vulnerable and Not Exploitable - Update Planned         |
|Advanced Threat Defense (ATD)                   |All    |
|Data Exchange Layer (DXL) Broker                |All    |
|Data Loss Prevention (DLP) - Prevent and Monitor|All    |
|McAfee Active Response (MAR) Server             |All    |
|Threat Intelligence Exchange (TIE) Server       |All    |

For a description of each product, see: https://www.mcafee.com/enterprise/en-us
/products/a-z.html .
To remediate this issue, go to the Product Downloads site , and download the
applicable product update/hotfix files:
|Product|Version|Type  |Release Date     |
|       |10.0.4 |      |                 |
|MWG    |9.2.8  |Update|February 15, 2021|
|       |8.2.17 |      |                 |

Download and Installation Instructions
For instructions to download McAfee 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 https://docs.mcafee.com .
Frequently Asked Questions (FAQs)
How do I know if my McAfee product is vulnerable or not
For Endpoint Security on Windows:
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.

For endpoint products and ENS on other platforms:
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 instructions, see
    KB52634 - How to determine what update is installed for ePO .
  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.

For DLP Endpoint ePO Extension:
Use the following instructions:

 1. Log on to the ePO server.
 2. Click Menu , Data Protection , DLP Policy .
 3. Inside the DLP console click Help , 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.

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 .
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.

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

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
Comment: http://www.auscert.org.au/render.html?it=1967