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McAfee Security Bulletin: Web Gateway update fixes vulnerabilities CVE-2015-5600 and CVE-2015-7704
Security Bulletins ID:   SB10164
Last Modified:  1/9/2019

Summary

First Published: July 28, 2016
 
 Impact of Vulnerability:  Denial of Service (CWE-730, OWASP 2004:A9)
 Information Leak / Disclosure (CWE-200)
 CVE Numbers:  CVE-2015-5600
 CVE-2015-7704
 Severity Rating:  Medium
 CVSS v3 Base / Temporal Scores:  CVE-2015-5600: Base: 5.3, Temporal: 4.6
 CVE-2015-7704: Base: 6.5, Temporal: 5.6
 Recommendations:  Install or update to McAfee Web Gateway (MWG) 7.5.2.9 or 7.6.2.1
 Security Bulletin Replacement:  None
 Affected Software:  MWG 7.5.2.8 and earlier, 7.6.2.0 and earlier
 Location of Updated Software:  http://www.mcafee.com/us/downloads/downloads.aspx

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Article contents:

Description

CVE-2015-5600
Information disclosure.
 
The OpenSSH sshd daemon does not check the list of keyboard-interactive authentication methods for duplicates. A remote attacker could use this flaw to bypass the MaxAuthTries limit, making it easier to perform password guessing attacks.
CVE-2016-7704
Information disclosure and denial of service.
 
The Network Time Protocol daemon (ntpd) as a client does not correctly check timestamps in Kiss-of-Death packets. A remote attacker could use this flaw to send a crafted Kiss-of-Death packet to an ntpd client that would increase the client's polling interval value and effectively disable synchronization with the server.

Remediation

Install the updated MWG version using the usual update path using the GUI or yum from the command line.

Go to the Product Downloads site and download the applicable product patch/hotfix files:
 
Product Type Version Release Date
MWG 7.5.2.9 Maintenance Release 7.5.2.9 July 26, 2016
MWG 7.6.2.1 Maintenance Release 7.6.2.1 July 27, 2016

For more information, see:
  • PD26617 - Web Gateway 7.6.2.1 Release Notes
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.

Workaround

None. Install the latest Maintenance Release.

Mitigations

No vulnerability detection signatures are available.

Acknowledgements

None.

Frequently Asked Questions (FAQs)

How do I know whether 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 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, 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-2015-5600
 
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) Low (L)
Availability (A) None (N)
Temporal Score (Overall) 4.6
Exploitability (E) Proof of concept Code (P)
Remediation Level (RL) Official Fix (O)
Report Confidence (RC) Reasonable (R)

NOTE: The following 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:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:R
 
CVE-2015-7704
 
Base Score 6.5
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) Low (L)
Availability (A) Low (L)
Temporal Score (Overall) 5.6
Exploitability (E) Proof of concept code (P)
Remediation Level (RL) Official Fix (O)
Report Confidence (RC) Reasonable (R)

NOTE: The following 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:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:R

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.

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 foregoing limitation may not apply.
 
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