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Intel Security - Security Bulletin: Email Gateway 7.6 update fixes cross-site scripting (XSS) vulnerability
Security Bulletins ID:   SB10153
Last Modified:  3/30/2016

Summary

First Published: 3/30/2016
 
 Impact of Vulnerability:  Cross-Site Scripting (XSS) (CWE-79)
 CVE Numbers:  None
 Severity Rating:  Medium
 CVSS v3 Base / Temporal Scores:
 6.4 / 5.5
 Recommendations:  Install or update to Email Gateway (MEG) 7.6.404
 Security Bulletin Replacement:  None
 Affected Software:  MEG 7.6
 Location of Updated Software:  http://www.mcafee.com/us/downloads/downloads.aspx

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Article contents:

Description

McAfee Email Gateway is vulnerable to cross-site scripting (XSS) in the generation of HTML email alerts using SMTP.
 
This issue is encountered when File Filtering is enabled with the action set to ESERVICES:REPLACE. With this configuration, when an email with an attachment is blocked and replaced with an alert, the corresponding alert displays the email attachment "as is" without it being XML/HTML escaped.
 
This patch remediates this vulnerability.
 
Affected Component:
  • Email Gateway 7.6

Remediation

Go to the Product Downloads site and download the applicable product patch/hotfix files:
 
Product Type Version File Name Release Date
MEG 7.6 Patch 7.6.404 MEG-7.6.404-3328.101.zip March 30, 2016

Download and Installation Instructions
See KB56057 for instructions on how to download Intel Security / 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.

Workaround

None. Intel Security strongly recommends that you install the available patch.

Mitigations

No vulnerability detection signatures are available.

Acknowledgements

Intel Security credits Wesley Neelen from DearBytes B.V. for reporting this flaw.

Frequently Asked Questions (FAQs)

How do I know whether my Intel Security product is vulnerable or not?

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 is displayed.
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, Intel Security 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?
 
CVSS v3.0 Scoring:
 
 Base Score 6.4
 Attack Vector (AV) Network (N)
 Attack Complexity (AC) Low (L)
 Privileges Required (PR) None (N)
 User Interaction (UI) Required (R)
 Scope (S) Changed (C)
Confidentiality (C) Low (L)
Integrity (I) Low (L)
Availability (A) None (N)
 Temporal Score (Overall)
5.5
 Exploitability (E) Proof-of-Concept (P)
 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-calculator?vector=AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C)

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 an Intel Security product, please visit our product security website at: http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx.

Resources

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Disclaimer

The information provided in this security bulletin is provided as is without warranty of any kind. Intel Security disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Intel Security or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits, or special damages, even if Intel Security 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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