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McAfee Security Bulletin - Common Catalog update fixes an XML External Entity Reference vulnerability (CVE-2018-6670)
Security Bulletins ID:   SB10236
Last Modified:  10/24/2019
Rated:


Summary

First Published: May 30, 2018
 
 Impact of Vulnerability: CWE-611: Improper Restriction of XML External Entity Reference ('XXE')
CWE-827: Improper Control of Document Type Definition
 CVE ID: CVE-2018-6670
 Severity Rating: High
 CVSS v3 Base/Temporal Scores: 7.6/7.3
 Recommendations: Install Common Catalog 2.0.3
 Security Bulletin Replacement: None
 Affected Software: Common Catalog versions earlier than 2.0.3
 Location of updated software: ePO Software Manager
 
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Article contents: Vulnerability Description
The Common Catalog library contains XML processing code, which by default is implementing the full set of features available within the standard JAVA libraries. This fact means that DOCTYPE and ENTITY processing is available, despite the Common Catalog functionality does not require it.

This feature of the XML standard might permit access and exfiltration of files local to the running JVM, to external URLs referenced within ENTITY specifications, using technique readily documented online. This means that a suitably crafted request made by an authorized user of the ePolicy Orchestrator (ePO) system may be able to expose such material.

CVE-2018-6670
External Entity Attack vulnerability in the ePO extension in McAfee Common Catalog versions earlier than 2.0.3 allows remote authenticated users to view confidential information via a crafted HTTP request parameter.
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-6670 
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6670
 
Affected Component:
  • Common Catalog versions earlier than 2.0.3
Remediation
Upgrade to Common Catalog 2.0.3.
 
The extensions are available in the ePO Software Manager by searching for Core Catalog ePO Extension:
 
Product Version Type File Name Release Date
Common Catalog 2.0.3 Update onPrem-common-catalog-2.0.3.123-extensions.zip May 30, 2018
 
Workaround
None. McAfee strongly recommends that you install the available update.
Mitigations
None. McAfee strongly recommends that you install the available update.
Acknowledgements
McAfee credits Łukasz Juszczyk from ING Tech Poland 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 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 is displayed.
For ePO/Server products:
Use the following instructions for server-based products:
  • Check the version and build of ePO that is installed. For information about how to check the version, see: KB52634.
  • Create a query in ePO for the product version of the product installed within your organization.
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?
 
CVE-2018-6670: XML External Entity Reference vulnerability
 
Base Score 7.6
Attack Vector (AV) Network (N)
Attack Complexity (AC) Low (L)
Privileges Required (PR) Low (L)
User Interaction (UI) Required (R)
Scope (S) Changed (C)
Confidentiality (C) High (H)
Integrity (I) None (N)
Availability (A) Low (L)
Temporal Score (Overall) 7.3
Exploitability (E) High(H)
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/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:L/E:H/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 are retired (removed) once a product is both End-of-Sell 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.
 
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 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, patch, 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.
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:
  • 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 login 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 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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