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             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0749
   Security Bulletin: Vulnerabilities in NTP affect IBM Security Network
       Protection (CVE-2015-5300, CVE-2015-7704, and CVE-2015-8138)
                               22 March 2016

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM Security Network Protection
Publisher:         IBM
Operating System:  Network Appliance
Impact/Access:     Denial of Service   -- Remote/Unauthenticated
                   Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-8138 CVE-2015-7704 CVE-2015-5300

Reference:         ESB-2016.0457
                   ESB-2016.0177
                   ESB-2015.3235
                   ESB-2015.2961
                   ESB-2015.2733
                   ESB-2015.2690

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg21979393

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Security Bulletin: Vulnerabilities in NTP affect IBM Security Network 
Protection (CVE-2015-5300, CVE-2015-7704, and CVE-2015-8138)

Document information

More support for:

IBM Security Network Protection

Software version:

5.3.1, 5.3.2

Operating system(s):

Firmware

Reference #:

1979393

Modified date:

2016-03-21

Security Bulletin

Summary

Security vulnerabilities have been discovered in NTP used with IBM Security 
Network Protection.

Vulnerability Details

CVEID: CVE-2015-5300

DESCRIPTION: Network Time Protocol (NTP) could allow a remote attacker to 
bypass security restrictions, caused by the failure to correctly implement the
threshold limitation for the '-g' option. An attacker could exploit this 
vulnerability using man-in-the-middle techniques to intercept NTP traffic and
make multiple steps larger than the panic threshold.

CVSS Base Score: 4.3

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/107594 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)

CVEID: CVE-2015-7704

DESCRIPTION: Network Time Protocol (NTP) is vulnerable to a denial of service,
caused by an error in the rate-limiting mechanism. By sending spoofed 
Kiss-o'-Death packets, an attacker could exploit this vulnerability to disable
NTP at a victim client.

CVSS Base Score: 7.5

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/107446 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2015-8138

DESCRIPTION: NTP could allow a remote attacker to bypass security 
restrictions. By sending a specially crafted packet with an origin timestamp 
of zero, an attacker could exploit this vulnerability to bypass the timestamp
validation check.

CVSS Base Score: 5.3

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/110025 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

IBM Security Network Protection 5.3.1

IBM Security Network Protection 5.3.2

Remediation/Fixes

Product 				VRMF 				Remediation/First Fix
	
IBM Security Network Protection 	Firmware version 5.3.1 		Download Firmware 5.3.1.8 from IBM Security License Key and Download Center and upload and 
									install via the Available Updates page of the Local Management Interface.

IBM Security Network Protection 	Firmware version 5.3.2 		Install Firmware 5.3.2.2 from the Available Updates page of the Local Management Interface, or
									by performing a One Time Scheduled Installation from SiteProtector.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support 
alerts like this.

References

Complete CVSS v3 Guide

On-line Calculator v3

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Change History

11 March 2016: Original Version Published

*The CVSS Environment Score is customer environment specific and will 
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the 
Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the 
Common Vulnerability Scoring System (CVSS) is an "industry open standard 
designed to convey vulnerability severity and help to determine urgency and 
priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY 
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT 
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

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