Security Bulletin: A vulnerability in Samba affects IBM Spectrum Scale SMB protocol access method (CVE-2019-10197)

Security Bulletin

Summary

A Samba vulnerability affects IBM Spectrum Scale SMB protocol access method that could allow a remote attacker to bypass security restrictions and gain access to the contents of directories outside of the share.

Vulnerability Details

In IBM Spectrum Scale by default wide links are forced to be disabled and that this CVE only applies to systems where wide links are forcibly enabled.

CVEID: CVE-2019-10197
DESCRIPTION: Samba could allow a remote attacker to bypass security restrictions, caused by an error when certain parameters were set in the samba configuration file. An attacker could exploit this vulnerability to escape the shared directory and gain access to the contents of directories outside of the share.
CVSS Base Score: 9.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/166366 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)

Affected Products and Versions

IBM Spectrum Scale V5.0.3.0 through V5.0.3.3

Remediation/Fixes

For IBM Spectrum Scale V5.0.3.0 through V5.0.3.3, apply V5.0.4.0 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

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

IBM Specrum Scale V5.0.3.0 through V5.0.3.3, reference APAR IJ20303

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

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

Off

*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 - 143740, Advisory id - 17863

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"STXKQY","label":"IBM Spectrum Scale"},"Component":"Not Applicable","Platform":[{"code":"PF016","label":"Linux"}],"Version":"5.0.3","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}}]

Tips

Security Bulletin: A vulnerability in Samba affects IBM Spectrum Scale SMB protocol access method (CVE-2019-10197)