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AUSCERT External Security Bulletin Redistribution
ESB-2017.2696
Security Bulletin: Network Time Protocol (NTP) vulnerability in AIX which
is used by IBM OS Images in IBM PureApplication Systems (CVE-2016-9310)
25 October 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM PureApplication System
Publisher: IBM
Operating System: AIX
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-9310
Reference: ESB-2017.2080
ESB-2017.1681
ESB-2017.1410
ESB-2017.0354
ESB-2017.0109
ESB-2016.3091
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=swg22009301
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Security Bulletin: Network Time Protocol (NTP) vulnerability in AIX which is
used by IBM OS Images in IBM PureApplication Systems (CVE-2016-9310)
Document information
More support for: PureApplication System
Security
Software version: 2.1.0.0, 2.1.0.1, 2.1.0.2, 2.1.1.0, 2.1.2.0, 2.1.2.1,
2.1.2.2, 2.1.2.3, 2.1.2.4, 2.2.0.0, 2.2.1.0, 2.2.2.0, 2.2.2.1, 2.2.2.2,
2.2.3.0, 2.2.3.1, 2.2.3.2, 2.2.4.0
Operating system(s): AIX
Reference #: 2009301
Modified date: 24 October 2017
Security Bulletin
Summary
There are vulnerabilities in the Network Time Protocol (NTP) in AIX that is
used by the OS Images for IBM PureApplication Software Suite, IBM Bluemix Local
System and IBM PureApplication System/Software
Vulnerability Details
CVEID: CVE-2016-9310
DESCRIPTION: NTP is vulnerable to a denial of service, caused by an error in
the control mode (mode 6) functionality. By sending specially crafted control
mode packets, a remote attacker could exploit this vulnerability to obtain
sensitive information and cause the application to crash.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
119087 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L)
Affected Products and Versions
IBM PureApplication System V2.1
IBM PureApplication System V2.2
Remediation/Fixes
Use workaround below.
Workarounds and Mitigations
The deployed AIX-based virtual machines on IBM PureApplication System types are
affected. The solution is to apply the following workaround:
1. Edit the /etc/ntp.conf file to include the line:
restrict -4 default nomodify nopeer noquery notrap
restrict -6 default nomodify nopeer noquery notrap
2. Stop and restart the xntpd service:
stopsrc -s xntpd
startsrc -s xntpd
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References
Complete CVSS v3 Guide
On-line Calculator v3
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
November 24, 2017: Original document 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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