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McAfee Security Bulletin - ePolicy Orchestrator workaround for a Tomcat vulnerability (CVE-2017-5647)
Security Bulletins ID:   SB10199
Last Modified:  6/6/2019


First Published: 5/18/2017
 Impact of Vulnerability:  Information Leak / Disclosure (CWE-717, OWASP 2004:A6)
 CVE Numbers:  CVE-2017-5647
 Severity Rating:  High
 CVSS v3 Base / Temporal Score:  7.5/7.0
 Recommendations:  Upgrade to the latest patch.
 Security Bulletin Replacement:  None
 Affected Software:  ePolicy Orchestrator (ePO) 5.1.3 and earlier 
 ePO 5.3.2 and earlier
 ePO 5.9.0
 Location of Updated Software:  http://www.mcafee.com/us/downloads/downloads.aspx

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Article contents:


The ePO user login service runs on Tomcat and as per CVE-2017-5647, the Tomcat version used by ePO is vulnerable to a possible Information Leak/Disclosure vulnerability. The Workaround section of this security bulletin provides a short-term way to mitigate the vulnerability for the following issue:
A bug in the handling of the pipelined requests in Apache Tomcat, when send file is used, results in the pipelined request being lost when send file processing of the previous request completes. This could result in responses appearing to be sent for the wrong request.

Affected Component:
  • ePO web core services


When available, to remediate CVE-2017-5647, upgrade ePO to one of the following scheduled releases:
  • Users of ePO 5.1.x should upgrade to ePO 5.3.3 or ePO 5.9.1.
  • Users of ePO 5.3.x should upgrade to ePO 5.3.3 or ePO 5.9.1.
  • Users of ePO 5.9.0 should upgrade to ePO 5.9.1.
Go to the Product Downloads site and download the applicable product patch/hotfix files:
Product Type Expected Release Date
ePO 5.3.3       Patch  Q2 2017
ePO 5.9.1 Patch Q4 2017

Download and Installation Instructions
See KB56057 for instructions on how to download McAfee products, documentation, security updates, patches, and hotfixes. Review the Release Notes and the Installation Guide, which you can download from the Documentation tab, for instructions on how to install these updates.


Follow these instructions to mitigate Tomcat CVE-2017-5647:
  1. Stop the ePO services:
    • McAfee ePolicy Orchestrator Event Parser
    • McAfee ePolicy Orchestrator Server
    • McAfee ePolicy Orchestrator Application Server
  2. Go to the following ePO installation directory: [ePO_Install_Dir]\Server\conf.
  3. Make a backup copy of the server.xml file: [ePO_Install_Dir]\Server\conf\server.xml. Name the backup file server.xml.bak.
  4. Open the server.xml file in Notepad or another plain text editor:
    1. Search for the following string:

      NOTE: If the string org.apache.coyote.http11.Http11NioProtocol is missing from the server.xml file, then ePO is not vulnerable, and no further action is required.

    2. Rename every occurrence of the string by removing "Nio" as shown:

    3. Save the file.
  5. Start the ePO services:
    • McAfee ePolicy Orchestrator Event Parser
    • McAfee ePolicy Orchestrator Server
    • McAfee ePolicy Orchestrator Application Server
Removal Instructions:
  1. Stop the ePO services:
    • McAfee ePolicy Orchestrator Event Parser
    • McAfee ePolicy Orchestrator Server
    • McAfee ePolicy Orchestrator Application Server
  2. Delete the server.xml file: [ePO_Install_Dir]\Server\conf\server.xml.
  3. Restore the backed up server.xml file. Rename the backup file from server.xml.bak to server.xml.
  4. Start the ePO services:
    • McAfee ePolicy Orchestrator Event Parser
    • McAfee ePolicy Orchestrator Server
    • McAfee ePolicy Orchestrator Application Server


This vulnerability was first disclosed by the Tomcat Security Team.

Frequently Asked Questions (FAQs)

How do I know whether my McAfee product is vulnerable or not?
For ePO:
Check the version and build of ePO that is installed. For information on how to check 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 that customers can use to judge how critical a vulnerability is and plan accordingly. For more information, please 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 successful exploitation of the issue being scored
What are the CVSS scoring metrics that have been used?
CVE-2017-5647: McAfee ePO and Apache Tomcat
 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) High (H)
 Integrity (I) None (N)
 Availability (A) None (N)
 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.

Where can I find a list of all security bulletins or how do I report a product vulnerability?
To find a list of all security bulletins, or if you have information about a security issue or vulnerability with a McAfee product, please visit our product security website at: http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx.


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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 foregoing 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 cancelled at any time.

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