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AUSCERT External Security Bulletin Redistribution
ESB-2017.1373
Security Bulletin: Vulnerability in Samba affects IBM Netez
za Host Management (CVE-2017-2619)
31 May 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Netezza Host Management
Publisher: IBM
Operating System: Linux variants
Windows
Virtualisation
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2017-2619
Reference: ESB-2017.1149
ESB-2017.1035
ESB-2017.0841
ESB-2017.0829
ESB-2017.0792.2
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg22003112
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Security Bulletin: Vulnerability in Samba affects IBM Netezza Host Management
(CVE-2017-2619)
Security Bulletin
Document information
More support for:
PureData System for Analytics
Host
Software version:
1.0.0
Operating system(s):
Platform Independent
Software edition:
All Editions
Reference #:
2003112
Modified date:
30 May 2017
Summary
OpenSource Samba is used by IBM Netezza Host Mangement. IBM Netezza Host
Management has addressed the applicable CVE.
Vulnerability Details
CVE-ID: CVE-2017-2619
DESCRIPTION: Samba could allow a remote authenticated attacker to launch a
symlink attack, caused by a race condition A local attacker could exploit this
vulnerability using SMB1 unix extensions to create a symbolic link from a
temporary file to various files on the system, which could allow the attacker
to view non- exported files.
CVSS Base Score: 4.3
CVSS Temporal Score:
https://exchange.xforce.ibmcloud.com/vulnerabilities/123775
for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions
IBM Netezza Host Management 5.4.5.0 - 5.4.12.0
Remediation/Fixes
None
Workarounds and Mitigations
Mitigation of the reported CVE applies to the following platforms only:
PureData System for Analytics N3001
PureData System for Analytics N200x
PureData System for Analytics N1001
IBM Netezza High Capacity Appliance C1000
IBM Netezza 1000
IBM Netezza 100
Execute below steps using "root" user on both ha1/ha2 hosts
Step 1. Check if Samba module is installed in the host
[host]# rpm -qa | grep samba
Step 2. Check if Samba service is running
[host]# /etc/init.d/smb status
Step 3. If Samba service is running, stop the smb service
[host]# /etc/init.d/smb stop
Step 4. Backup the /etc/samba/smb.conf file
[host]# cp /etc/samba/smb.conf /etc/samba/smb.conf_backup
Step 5. Edit the /etc/samba/smb.conf and set following parameters in global
settings as below:
#============ Global Settings ==========
[global]
unix extensions = no
Step 6. Start the smb services using below command:
[host]# /etc/init.d/smb start
Note : If samba configuration file smb.conf is changed/modified in future,
please verify if above settings is changed. If changed please make sure to
mitigate this issue by following steps 2 to 6.
References
Complete CVSS v3 Guide
On-line Calculator v3
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
31 May 2017: 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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