Security Bulletin: A vulnerability in Samba affects IBM Spectrum Scale SMB protocol access method (CVE-2017-9461)
A Samba vulnerability affects IBM Spectrum Scale SMB protocol access method which could allow denial of service, caused by improper handling of dangling symlinks in smbd. A remote attacker could exploit this vulnerability to cause a fd_open_atomic infinite loop with high CPU usage and memory consumption on the system.
DESCRIPTION: Samba is vulnerable to a denial of service, caused by improper handling of dangling symlinks in smbd. A remote attacker could exploit this vulnerability to cause a fd_open_atomic infinite loop with high CPU usage and memory consumption on the system.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/126916 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
IBM Spectrum Scale V184.108.40.206
IBM Spectrum Scale V220.127.116.11 thru V18.104.22.168
IBM Spectrum Scale V22.214.171.124 thru V126.96.36.199
IBM Spectrum Scale V4.2.0 thru V188.8.131.52
IBM Spectrum Scale V184.108.40.206 thru V220.127.116.11
For IBM Spectrum Scale V18.104.22.168 thru V22.214.171.124, apply V126.96.36.199, or later, available from FixCentral at
For IBM Spectrum Scale V188.8.131.52 thru V184.108.40.206, apply V220.127.116.11 available from FixCentral at
If you cannot apply the latest level of service, contact IBM Service for an efix:
- For IBM Spectrrum Scale 18.104.22.168 - 22.214.171.124, 126.96.36.199 - 188.8.131.52, 184.108.40.206 - 220.127.116.11, and 18.104.22.168, reference APAR IV97368
- For IBM Spectrum Scale V22.214.171.124 thru 126.96.36.199, reference APAR IV97547
To contact IBM Service, see http://www.ibm.com/planetwide/
Workarounds and Mitigations
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14 August 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.
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.