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AUSCERT External Security Bulletin Redistribution
ESB-2019.3479
Updates and product status for HTTP/2 vulnerabilities (CVE-2019-9511,
CVE-2019-9512, CVE-2019-9513, CVE-2019-9514, CVE-2019-9515, CVE-2019-9516,
CVE-2019-9517, CVE-2019-9518, CVE-2019-3643, and CVE-2019-3644) (SB10296)
12 September 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: McAfee MLOS
McAfee Web Gateway
Publisher: McAfee
Operating System: Windows
Linux variants
Mac OS
Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-9518 CVE-2019-9517 CVE-2019-9516
CVE-2019-9515 CVE-2019-9514 CVE-2019-9513
CVE-2019-9512 CVE-2019-9511 CVE-2019-3644
CVE-2019-3643
Reference: ASB-2019.0238
ESB-2019.3468
ESB-2019.3458
ESB-2019.3440
ESB-2019.3437
ESB-2019.3432
Original Bulletin:
https://kc.mcafee.com/corporate/index?page=content&id=SB10296
- --------------------------BEGIN INCLUDED TEXT--------------------
McAfee Security Bulletin - Updates and product status for HTTP/2
vulnerabilities (CVE-2019-9511, CVE-2019-9512, CVE-2019-9513, CVE-2019-9514,
CVE-2019-9515, CVE-2019-9516, CVE-2019-9517, CVE-2019-9518, CVE-2019-3643, and
CVE-2019-3644)
Security Bulletins ID : SB10296
Last Modified : 9/10/2019
Summary
First Published: September 10, 2019
+--------------------+--------------------------------------------------------+
|Impact of |Denial of Service |
|Vulnerability: | |
+--------------------+--------------------------------------------------------+
| |McAfee Linux Operating System (MLOS) NGINX: |
|CVE ID: |CVE-2019-9511, CVE-2019-9513, CVE-2019-9516 |
| |McAfee Web Gateway (MWG): CVE-2019-3643, CVE-2019-3644 |
+--------------------+--------------------------------------------------------+
|Severity Rating: |CVE-2019-3643: Medium |
| |CVE-2019-3644: High |
+--------------------+--------------------------------------------------------+
|CVSS v3 Base/ |CVE-2019-3643: 5.3 / 4.9 |
|Temporal Scores: |CVE-2019-3644: 7.5 / 7.0 |
+--------------------+--------------------------------------------------------+
|Recommendations: |Deploy product updates as they are made available. |
+--------------------+--------------------------------------------------------+
|Security Bulletin |None |
|Replacement: | |
+--------------------+--------------------------------------------------------+
| | o MLOS - vulnerable version of NGINX |
| | o MWG - protocol scanning |
| | o These products ship with a vulnerable and not |
|Affected Software: | exploitable web server: |
| | McAfee Active Response Server (MAR) |
| | Advanced Threat Defense (ATD) |
| | Enterprise Security Manager (ESM) SIEM |
+--------------------+--------------------------------------------------------+
|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 McAfee Product Vulnerability Status
o Remediation
o Product Specific Notes
o Frequently Asked Questions (FAQs)
o Resources
o Disclaimer
Vulnerability Description
Multiple McAfee products offer HTTP services or process the HTTP protocol. On
August 13, 2019 there was a disclosure of multiple vulnerabilities in the way
products had implemented HTTP/2. You can find more information in the Netflix
advisory - https://github.com/Netflix/security-bulletins/blob/master/advisories
/third-party/2019-002.md .
This Security Bulletin describes the McAfee products that are and are not
impacted.
o MWG is impacted by CVE-2019-9511 and CVE-2019-9517, addressed through
CVE-2019-3643 and CVE-2019-3644 respectively. The scanning proxies support
HTTP/2 and have been updated to address these issues.
o MLOS offers NGINX and has updated the NGINX version to 1.16.1. NGINX is
vulnerable to CVE-2019-9511, CVE-2019-9513, and CVE-2019-9516. You can find
more details about NGINX's website at: https://www.NGINX.com/blog/
NGINX-updates-mitigate-august-2019-http-2-vulnerabilities/ .
o A vulnerable version of NGINX is used in MAR Server and ATD. Neither of
these products offer HTTP/2 and are not exploitable.
o A vulnerable version of Apache is used in ESM SIEM. SIEM does not offer
HTTP/2 and is not exploitable.
o No other products are impacted by the HTTP/2 vulnerabilities.
MWG CVEs:
1. CVE-2019-3643
McAfee Web Gateway (MWG) earlier than 7.8.2.13 is vulnerable to a remote
attacker exploiting CVE-2019-9511, potentially leading to a denial of
service. This affects the scanning proxies.
https://web.nvd.nist.gov/view/vuln/detailvulnId=CVE-2019-3643
https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2019-3643
2. CVE-2019-3644
McAfee Web Gateway (MWG) earlier than 7.8.2.13 is vulnerable to a remote
attacker exploiting CVE-2019-9517, potentially leading to a denial of
service. This affects the scanning proxies.
https://web.nvd.nist.gov/view/vuln/detailvulnId=CVE-2019-3644
https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2019-3644
McAfee Product Vulnerability Status
Investigation into all McAfee products is ongoing. This Security Bulletin will
be updated as additional information is available. Not every version of the
"Vulnerable and Updated" products are vulnerable. See the Product Specific
Notes section below for details. Products not on these lists are being
investigated.
+-----------------------------------------------------------------------------+
|Product Status and Remediation Availability |
+---------------------+-----------+-------------------------------------------+
|Product |Version |Notes |
+---------------------+-----------+-------------------------------------------+
|Vulnerable and Updated |
+---------------------+-----------+-------------------------------------------+
| | |Available from our public repository: http:|
|MLOS |3 |//mcafeelinux.org/mlos/mlosrepo/3/updates/ |
| | |See Product Specific Notes |
+---------------------+-----------+-------------------------------------------+
| | |Available from our public repository: http:|
|MLOS |2 |//mcafeelinux.org/mlos/mlosrepo/2/updates/ |
| | |See Product Specific Notes |
+---------------------+-----------+-------------------------------------------+
| |8.x, |Updates released - see the Remediation |
|MWG |7.8.2.x, |table |
| |7.7.2.x | |
+---------------------+-----------+-------------------------------------------+
|Vulnerable and Not Exploitable |
+---------------------+-----------+-------------------------------------------+
|ATD |All |ATD ships with a vulnerable version of |
| |versions |NGINX. No HTTP/2 functionality is offered. |
+---------------------+-----------+-------------------------------------------+
|MAR Server |All |MAR ships with a vulnerable version of |
| |versions |NGINX. No HTTP/2 functionality is offered. |
+---------------------+-----------+-------------------------------------------+
|ESM SIEM |All |SIEM ships with a vulnerable version of |
| |versions |Apache. No HTTP/2 functionality is offered.|
+---------------------+-----------+-------------------------------------------+
|Not Vulnerable |
+---------------------+-----------+-------------------------------------------+
|Data Loss Prevention |11.x, 10.x | |
|Monitor (DLP Monitor)| | |
+---------------------+-----------+-------------------------------------------+
|Data Loss Prevention |11.x, 10.x | |
|Prevent (DLP Prevent)| | |
+---------------------+-----------+-------------------------------------------+
|Data Exchange Layer |All | |
|(DXL) Broker |versions | |
+---------------------+-----------+-------------------------------------------+
|ePolicy Orchestrator |All | |
|(ePO) |versions | |
+---------------------+-----------+-------------------------------------------+
|McAfee Email Gateway |All | |
|(MEG) |versions | |
+---------------------+-----------+-------------------------------------------+
|Network Data Loss | | |
|Prevention (Network |9.3 | |
|DLP) | | |
+---------------------+-----------+-------------------------------------------+
|Network Security |All | |
|Manager (NSM) |versions | |
+---------------------+-----------+-------------------------------------------+
|Network Security |All | |
|Platform (NSP) |versions | |
+---------------------+-----------+-------------------------------------------+
|Network Threat |All | |
|Behavioral Analysis |versions | |
|(NTBA) | | |
+---------------------+-----------+-------------------------------------------+
|Threat Intelligence |All | |
|Exchange (TIE) Server|versions | |
+---------------------+-----------+-------------------------------------------+
For a description of each product, see: https://www.mcafee.com/enterprise/en-us
/products/a-z.html .
Remediation
Go to the Product Downloads site, and download the applicable product update/
hotfix files:
o ATD, MAR, and SIEM - Future updates will update their web servers.
o MLOS - For customers using the MLOS repository, go directly to the
repository and pull the latest updates.
o MWG:
Customers using 8.1.x: Update to 8.2.
Customers using 7.8.2.x: Update to 7.8.2.13.
Customers using 7.7.2.x: Update to 7.7.2.24, and consider updating to
7.8.2.13.
+-------+--------+------+----------------------+------------------+
|Product|Versions|Type |Earliest Fixed Version|Release Date |
+-------+--------+------+----------------------+------------------+
| |8.1.x |Update|8.2 | |
|MWG |7.8.2.x |Update|7.8.2.13 |September 10, 2019|
| |7.7.2.x |Update|7.7.2.24 | |
+-------+--------+------+----------------------+------------------+
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.
Product Specific Notes
MLOS
MLOS ships with NGINX. For customers using MLOS from the public repository, we
have updated NGINX to version 1.16.1 to address CVE-2019-9511, CVE-2019-9513,
and CVE-2019-9516. MLOS and its components are not affected by CVE-2019-9512,
CVE-2019-9514, CVE-2019-9515, CVE-2019-9517, and CVE-2019-9518.
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.
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: 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
1. CVE-2019-3643: MWG scanners updated to address CVE-2019-9511
+------------------------+----------------+
|Base Score |5.3 |
+------------------------+----------------+
|Attack Vector (AV) |Network (N) |
+------------------------+----------------+
|Attack Complexity (AC) |Low (L) |
+------------------------+----------------+
|Privileges Required (PR)|None (N) |
+------------------------+----------------+
|User Interaction (UI) |None (N) |
+------------------------+----------------+
|Scope (S) |Unchanged (U) |
+------------------------+----------------+
|Confidentiality (C) |None (N) |
+------------------------+----------------+
|Integrity (I) |None (N) |
+------------------------+----------------+
|Availability (A) |Low (L) |
+------------------------+----------------+
|Temporal Score (Overall)|4.9 |
+------------------------+----------------+
|Exploitability (E) |Functional (F) |
+------------------------+----------------+
|Remediation Level (RL) |Official Fix (O)|
+------------------------+----------------+
|Report Confidence (RC) |Confirmed (C) |
+------------------------+----------------+
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculatorvector=CVSS:3.0/AV:N/AC:L/PR:N/UI:N
/S:U/C:N/I:N/A:L/E:F/RL:O/RC:C
2. CVE-2019-3644: MWG scanners updated to address CVE-2019-9517
+------------------------+----------------+
|Base Score |7.5 |
+------------------------+----------------+
|Attack Vector (AV) |Network (N) |
+------------------------+----------------+
|Attack Complexity (AC) |Low (L) |
+------------------------+----------------+
|Privileges Required (PR)|None (N) |
+------------------------+----------------+
|User Interaction (UI) |None (N) |
+------------------------+----------------+
|Scope (S) |Unchanged (U) |
+------------------------+----------------+
|Confidentiality (C) |None (N) |
+------------------------+----------------+
|Integrity (I) |None (N) |
+------------------------+----------------+
|Availability (A) |High (H) |
+------------------------+----------------+
|Temporal Score (Overall)|7.0 |
+------------------------+----------------+
|Exploitability (E) |Functional (F) |
+------------------------+----------------+
|Remediation Level (RL) |Official Fix (O)|
+------------------------+----------------+
|Report Confidence (RC) |Confirmed (C) |
+------------------------+----------------+
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculatorvector=CVSS:3.0/AV:N/AC:L/PR:N/UI:N
/S:U/C:N/I:N/A:H/E:F/RL:O/RC:C
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.
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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