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McAfee Security Bulletin - Updates for Intel "ZombieLoad" microprocessor data leakage flaws (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and CVE-2019-11091)
Security Bulletins ID:   SB10292
Last Modified:  9/10/2019


First Published: September 10, 2019
 Impact of Vulnerability: Low – see the CVE Information section below.
                                        CVE Information: ​
Severity Rating CVSS v3 Base Score Affected Products 
CVE-2018-12126 Medium 6.5 Advanced Threat Defense (ATD), Data Exchange Layer (DXL), Data Loss Prevention Monitor (DLP Monitor), Data Loss Prevention Prevent (DLP Prevent), McAfee Active Response (MAR), McAfee Email Gateway (MEG), McAfee Linux Operating System (MLOS), McAfee Web Gateway (MWG), Network Data Loss Prevention (Network DLP), Network Security Manager (NSM) Linux, Network Security Platform (NSP), Network Threat Behavioral Analysis (NTBA), SIEM, Threat Intelligence Exchange (TIE) Server
CVE-2018-12127 Medium 6.5
CVE-2018-12130 Medium 6.2
CVE-2019-11091 Low 3.8
 Highest CVSS v3 Base Score: ​ 6.5
 Recommendations: Deploy the fixes as they are made available.
 Security Bulletin Replacement: None
 Affected Software: See the McAfee Product Vulnerability Status table below. 
 Location of updated software: http://www.mcafee.com/us/downloads/downloads.aspx

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Article contents: Vulnerability Description
Scope of this Security Bulletin:
  • Any product that McAfee offers that comes bundled with an operating system, either on hardware or as a virtual machine, will be covered in this Security Bulletin.  
  • Where McAfee software is installed on an operating system provided by the customer, we will only list the product here if we are releasing a fix. By default, these products will be protected by the Intel and operating system vendor provided updates.
McAfee products that ship as appliances or virtual images are vulnerable to these CVEs as they run on affected Intel CPUs. These systems are 'closed' as they do not allow multiple users to log on and execute programs of their choice. As such the likelihood of being exploited is considered low.

As with previous related CVEs (Spectre/Meltdown variants), McAfee plans to address these vulnerabilities as part of the regular update cycles for the impacted products. These vulnerabilities have been given the code name "ZombieLoad".

For McAfee virtual appliances, including instances running in the cloud, ensure that you have applied the vendor fixes to the virtual environment they are running in.
  1. CVE-2019-11091
    Uncacheable memory on some microprocessors utilizing speculative execution can allow an authenticated user to potentially enable information disclosure via a side channel with local access.
  2. CVE-2018-12126
    Modern Intel® microprocessors implement hardware-level micro-optimizations to improve the performance of writing data back to CPU caches. The write operation is split into STA (STore Address) and STD (STore Data) sub operations. These sub operations allow the processor to hand-off address generation logic into these sub operations for optimized writes. Both of these sub operations write to a shared distributed processor structure called the 'processor store buffer'. As a result, an unprivileged attacker could use this flaw to read private data resident within the CPU's processor store buffer.
  3. CVE-2018-12130
    A flaw was found in the implementation of the "fill buffer," a mechanism used by modern CPUs when a cache-miss is made on L1 CPU cache. If an attacker can generate a load operation that would create a page fault, the execution continues speculatively with incorrect data from the fill buffer while the data is fetched from higher-level caches. This response time can be measured to infer data in the fill buffer.
  4. CVE-2018-12127
    Microprocessors use a ‘load port’ subcomponent to perform load operations from memory or IO. During a load operation, the load port receives data from the memory or IO subsystem and then provides the data to the CPU registers and operations in the CPU's pipelines. Stale load operations results are stored in the 'load port' table until overwritten by newer operations. Certain load-port operations triggered by an attacker can be used to reveal data about previous stale requests leaking data back to the attacker via a timing side-channel.
McAfee Product Vulnerability Status
The table below shows the status of all currently supported products where McAfee provides the operating system. The table will be populated with versions and dates released as they are made available.
Product Status and Remediation Availability
Product Version CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 CVE-2019-11091
Vulnerable and Updated
MLOS   3 Available from our public repository: http://mcafeelinux.org/mlos/mlosrepo/3/updates/
MLOS 2 Available from our public repository: http://mcafeelinux.org/mlos/mlosrepo/2/updates/
TIE Server
(includes MAR 2.4)
2.0.x, 2.1.x, 2.2.x, 2.3.x Update to TIE Server 2.3.1 Hotfix 2 (see the Remediation table) or manually apply the packages using KB90843
Not Vulnerable
NSP    All Not Vulnerable - All CVEs
NTBA All Not Vulnerable - All CVEs
Vulnerable and Not Exploitable - Update Planned
ATD    4.6.x Vulnerable and Not Exploitable - Update Planned - All CVEs
DLP Monitor    11.x Vulnerable and Not Exploitable - Update Planned - All CVEs
DLP Prevent    10.x, 11.x Vulnerable and Not Exploitable - Update Planned - All CVEs
DXL Server    4.1.x, 5.0.x Vulnerable and Not Exploitable - Update Planned - All CVEs

(See TIE for MAR 2.4)
2.2.x, 2.3.x Vulnerable and Not Exploitable - Update Planned - All CVEs
MEG    7.6.40x Vulnerable and Not Exploitable - Update Planned - All CVEs
MWG    7.7.2.x, 7.8.2.x, 8.1.x Vulnerable and Not Exploitable - Update Planned - All CVEs
NSM Linux    9.1.x Vulnerable and Not Exploitable - Update Planned - All CVEs
SIEM Enterprise Security Manager     10.x, 11.x Vulnerable and Not Exploitable - Update Planned - All CVEs
Vulnerable and Not Exploitable - Will not be Updated
Network DLP 9.3 Vulnerable and Not Exploitable - Will not be Updated - All CVEs.
9.3 reaches End of Life in October 2019. Ugrade to 11.x.
NOTE: After applying the update to your appliances, physical or virtual, they must be rebooted to fully apply the fix.

For a description of each product, see: https://www.mcafee.com/enterprise/en-us/products/a-z.html.
Install the versions listed below when the releases are made available. McAfee recommends that you install the available fixes. Otherwise, apply any available workarounds.

To remediate this issue, go to the Product Downloads site, and download the applicable product update/hotfix files:
Product Versions Type Earliest Fixed Version Release Date
TIE  2.3.1 Hotfix 2.3.1 Hotfix 2 September 10, 2019
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. You can download these documents from the Documentation tab.
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 on 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:
Use the following instructions for ePO:
Check the version and build of ePO that is installed. For information about how to check the version, see: KB52634.

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.
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) 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 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?
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 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:
  • If you are a registered user, type your User ID and Password, and then click Log In.
  • 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.

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