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Security Bulletin: Vulnerability in Open Source Samba affects IBM Netezza Host Management

Created by Ruchi Kaushal on
Published URL:
https://www.ibm.com/support/pages/node/882842
882842

Security Bulletin


Summary

Open Source Samba is used by IBM Netezza Host Mangement. IBM Netezza Host Management has provided mitigation for the applicable CVE.

Vulnerability Details

CVEID: CVE-2019-3880
DESCRIPTION: Samba could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially-crafted "winreg_SaveKey" request to create a new registry hive file outside a Samba share.
CVSS Base Score: 6.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/159188 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L)

Affected Products and Versions

  • IBM Netezza Host Management 5.2.1.0 - 5.4.24.0

Remediation/Fixes

None

Workarounds and Mitigations

Mitigation of the reported CVE CVE-2019-3880 on following platforms : 

PureData System for Analytics N1001
IBM Netezza High Capacity Appliance C1000
IBM Netezza 1000 
IBM Netezza 100
PureData System for Analytics N200x and N3001
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 parameter as below:

Either turn off SMB1 by setting the global parameter:
#============ Global Settings ==========

[global]
min protocol = SMB2
OR,

if SMB1 is required turn off unix extensions by setting the global parameter:
[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.

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

02 May 2019: 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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Document Information

Modified date:
17 October 2019

UID

ibm10882842

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