A security vulnerability has been identified in all levels of IBM Spectrum Scale that could allow underprivileged attacker to execute commands as root. A fix for this vulnerability is available.
DESCRIPTION: IBM Spectrum Scale could allow a local unprivileged attacker with intimate knowledge of the enviornment to execute commands as root using specially crafted input.
CVSS Base score: 7.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/175977 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
|IBM Spectrum Scale||All|
For IBM Spectrum Scale V184.108.40.206 through V220.127.116.11, apply V18.104.22.168 available from FixCentral at:
If you cannot apply the latest level of service, contact IBM Service for an efix:
- For IBM Spectrum Scale V22.214.171.124 through V126.96.36.199, reference APAR IJ23438
- For IBM Spectrum Scale V188.8.131.52 through V184.108.40.206, reference APAR IJ23426
Workarounds and Mitigations
ls -l /usr/lpp/mmfs/bin | grep r-s
Then reset the setuid bit for each such file by issuing this command on each file
chmod u-s file
Once the workaround is applied, a number of commands may no longer work when not invoked by unprivileged users, including:
Get Notified about Future Security Bulletins
The vulnerability was reported to IBM by Winston S
21 April 2020: Final version Published with updated APAR details
*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.
22 April 2020