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             AUSCERT External Security Bulletin Redistribution

        McAfee Security Bulletin - McAfee Agent for Windows update
           addresses weak directory permissions (CVE-2019-3592)
                               5 August 2019


        AusCERT Security Bulletin Summary

Product:           McAfee Agent for Windows
Publisher:         McAfee
Operating System:  Windows
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-3592  

Original Bulletin: 

Revision History:  August  5 2019: Vendor updated hotfix details
                   July   29 2019: Updated fix released and credit given to bug reporter
                   July   10 2019: Initial Release

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McAfee Security Bulletin - McAfee Agent for Windows update addresses weak
directory permissions (CVE-2019-3592)

Security Bulletins ID   : SB10288

Last Modified           : 7/30/2019


First Published: July 8, 2019
|Impact of Vulnerability:  |Privilege escalation vulnerability                |
|CVE ID:                   |CVE-2019-3592                                     |
|Severity Rating:          |High                                              |
|CVSS v3 Base/Temporal     |7.2 / 6.5                                         |
|Scores:                   |                                                  |
|Recommendations:          |Install or update to McAfee Agent (MA) 5.6.1      |
|                          |Hotfix 3 (HF3)                                    |
|Security Bulletin         |None                                              |
|Replacement:              |                                                  |
|Affected Software:        |MA for Windows 5.x before 5.6.1 HF3               |
|Location of updated       |http://www.mcafee.com/us/downloads/downloads.aspx |
|software:                 |                                                  |

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Article contents:

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

Vulnerability Description
When MA is installed, it includes a tool to facilitate McAfee product updates.
To exploit this vulnerability, an attacker would need to gain administrator
rights on the target machine and place certain files in the MA directory,
preventing MA from triggering McAfee product updates. Permissions have been
updated to prevent users with administrator rights from placing or modifying
files in the MA directory.

Privilege escalation vulnerability in McAfee Agent (MA) before 5.6.1 HF3,
allows local administrator users to potentially disable some McAfee processes
by manipulating the MA directory control and placing a carefully constructed
file in the MA directory.
To remediate this issue, install the hotfix shown in the table below.

Go to the Product Downloads site, and download the applicable product hotfix
|Product    |Versions|Type         |File Name                   |Release Date |
|MA for     |5.6.1   |Hotfix       |MA561Hotfix3WIN.zip         |July 17, 2019|
|Windows    |HF3     |             |MA561Hotfix3WIN_EMBEDDED.zip|             |
|MA for     |5.5.x   |To Be        |To Be Determined            |To Be        |
|Windows    |        |Determined   |                            |Determined   |

Download and Installation Instructions
See KB56057 for instructions to download McAfee products, documentation,
updates, and hotfixes. For instructions to install these updates, see the
Release Notes and the Installation Guide, which you can download from the
Documentation tab.
McAfee credits Edsel Valle from NSS Labs for reporting this flaw.
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, click Action Menu .
 4. In the Action Menu, click Product Details . The product version displays.

For ePO:
Use the following instructions for ePO:
Verify the version and build of ePO that is installed. For information about
how to verify the version, see: KB52634 .

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 the criticality of a
vulnerability 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

CVE-2019-3592: MA for Windows update addresses weak directory permissions
|Base Score              |7.2                 |
|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)     |High (H)            |
|Integrity (I)           |High (H)            |
|Availability (A)        |High (H)            |
|Temporal Score (Overall)|6.5                 |
|Exploitability (E)      |Proof-of-Concept (P)|
|Remediation Level (RL)  |Official Fix (O)    |
|Report Confidence (RC)  |Confirmed (C)       |

NOTE: The following CVSS version 3.0 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 at http://
www.mcafee.com/us/threat-center/product-security-bulletins.aspx > Security
Bulletins. Security Bulletins are retired (removed) after 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 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 http://www.mcafee.com/us/
threat-center/product-security-bulletins.aspx > 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
damage 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 might not apply.

Any future product release dates mentioned in this Security Bulletin are
intended to outline our general product direction, and they must not be relied
on in making a purchasing decision. The product release dates are for
information purposes only, and must 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 can be changed or canceled at any time

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