IBM Support

Security Bulletin: A vulnerability in Samba affects IBM Spectrum Scale SMB protocol access method (CVE-2019-3880)

Created by Prayas Gupta on
Published URL:
https://www.ibm.com/support/pages/node/884654
884654

Security Bulletin


Summary

A Samba vulnerability affects IBM Spectrum Scale SMB protocol access method that could allow a remote authenticated attacker to traverse a symbolic link on the system and write files outside the SMB share.

Vulnerability Details

This vulnerability only affects systems having SMB1 and Unix-Extensions enabled. By default in Spectrum Scale these are not enabled and supported.
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 Spectrum Scale V5.0.0.0 thru V5.0.3.0

IBM Spectrum Scale V4.2.0.0 thru V4.2.3.14

IBM Spectrum Scale V4.1.0.0 thru V4.1.1.22

Remediation/Fixes

For IBM Spectrum Scale V5.0.0.0 thru V5.0.3.0, apply V5.0.3.1 available from FixCentral at
https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=5.0.2&platform=All&function=all

For IBM Spectrum Scale V4.2.0.0 thru V4.2.3.14, apply V4.2.3.15 available from FixCentral at
https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=4.2.3&platform=All&function=all

For IBM Spectrum Scale V4.1.0.0 (GPFS) thru V4.1.1.22, apply V4.1.1.23 available from FixCentral at
https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%2Bdefined%2Bstorage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=4.1.1&platform=All&function=all

If you cannot apply the latest level of service, contact IBM Service for an efix

  • IBM Specrum Scale V5.0.0.0 thru V5.0.3.0, reference APAR  IJ16214
  • IBM Spectrum Scale 4.2.0.0 thru 4.2.3.14, reference APAR IJ16213



To contact IBM Service, see http://www.ibm.com/planetwide/

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

3 June 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.

Internal Use Only

PR - 134795, Advisory id - 15878

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Document Information

Modified date:
03 June 2019

UID

ibm10884654

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