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McAfee Security Bulletin - Web Gateway update fixes CVE-2018-3180 and CVE-2018-13785
Security Bulletins ID:   SB10255
Last Modified:  11/14/2018

Summary

First Published: November 14, 2018
 
 Impact of Vulnerability: CVE-2018-3180: Improper Certificate Validation
CVE-2018-13785: Denial of Service
 CVE ID: CVE-2018-3180
CVE-2018-13785
 Severity Rating: CVE-2018-3180: Medium
CVE-2018-13785: Low
 CVSS v3 Base/Temporal Scores: CVE-2018-3180: 4.8 / 4.6
CVE-2018-13785: 2.4 / 2.3
 Recommendations: Install or update to McAfee Web Gateway (MWG) 7.8.2.4 (main release)
Install or update to MWG 8.0.1 (controlled release)
 Security Bulletin Replacement: None
 Affected Software: CVE-2018-3180: MWG 7.7.2.x, 7.8.2.x, 8.0
CVE-2018-13785: MWG 7.7.2.x, 7.8.2.x, 8.0
 Location of updated software: http://www.mcafee.com/us/downloads/downloads.aspx
 
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Article contents: Vulnerability Description
This update resolves the following vulnerabilities:
  1. CVE-2018-3180 
    A certificate verification flaw was found in the JSSE component of OpenJDK. No check was performed during the TLS session resumption to ensure that the same endpoint identification algorithm had been used when originally opening the session as was required when resuming the session. In certain cases, this could lead to having a TLS connection established without required server identity verification.
    https://access.redhat.com/security/cve/cve-2018-3180
    https://nvd.nist.gov/vuln/detail/CVE-2018-3180
     
  2. CVE-2018-13785
    In libpng 1.6.34, an incorrect calculation of row factor in the png_check_chunk_length function (pngrutil.c) might trigger an integer overflow and resultant divide-by-zero while processing a crafted PNG file, leading to a denial of service.
    https://nvd.nist.gov/vuln/detail/CVE-2018-13785
    To make Tomcat parse a crafted PNG, the attacker needs to have administrative permissions on MWG. Furthermore, if exploited, there is an availability issue with the user interface, but the proxy process that performs the filtering is not affected.
Remediation
To remediate this issue, go to the Product Downloads site, and download the applicable product update file:
 
Product Type Version File Name Release Date
MWG Main Release 7.8.2.4 or later mwgappl-7.8.2.4.0-27219-x.86_64.iso November 13, 2018
MWG Controlled Release 8.0.1 or later mwgappl-8.0.1-27227-x.86_64.iso November 13, 2018
 
The main release is not affected by these vulnerabilities.

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, which you can download from the Documentation tab, for instructions on how to install these updates.
Workaround
CVE-2018-3180: None
CVE-2018-13785: None
    
McAfee strongly encourages installing the provided releases specified in the Remediation table.
Acknowledgments
Vulnerability CVE-2018-3180 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-3180.
Vulnerability CVE-2018-13785 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-13785.
Frequently Asked Questions (FAQs)
How do I know if my McAfee 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 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-2018-3180:
     
    Base Score 4.8
    Attack Vector (AV) Network (N)
    Attack Complexity (AC) High (H)
    Privileges Required (PR) None (N)
    User Interaction (UI) None (N)
    Scope (S) Unchanged (U)
    Confidentiality (C) Low (L)
    Integrity (I) Low (L)
    Availability (A) None (N)
    Temporal Score (Overall) 4.6
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X)
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score. Scoring from Red Hat is used in this Security Bulletin.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/RL:O
     
  2. CVE-2018-13785:
     
    Base Score 2.4
    Attack Vector (AV) Network (N)
    Attack Complexity (AC) Low (L)
    Privileges Required (PR) High (H)
    User Interaction (UI) Required (R)
    Scope (S) Unchanged (U)
    Confidentiality (C) None (N)
    Integrity (I) None (N)
    Availability (A) Low (L)
    Temporal Score (Overall) 2.3
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X)
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score. For MWG, to make Tomcat parse a crafted PNG the attacker needs to have administrative permissions. Furthermore, if exploited, there is an availability issue with the user interface, but the proxy process that performs the filtering is not affected, so the availability impact is considered "Low" for MWG.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L/RL:O
Where can I find a list of all Security Bulletins?
All Security Bulletins are published on our external PSIRT website. Go to http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx and click Security Bulletins - Corporate. Security Bulletins are removed when 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, go to the McAfee PSIRT website for instructions at http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx and click Report a Security Vulnerability.
 
How does McAfee respond to this and any other reported security flaws?
McAfee's key priority is the security of our customers. If a vulnerability is found within any of McAfee's 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 publishes Security Bulletins only 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.
 
To view our PSIRT policy, go to the McAfee PSIRT website at http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx, and click About PSIRT.
Resources
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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.
 
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