Security Bulletin
Summary
A security vulnerability has been identified in all levels of IBM Spectrum Scale and IBM GPFS that could allow a local attacker to inject commands into setuid file parameters and execute commands as root.
Vulnerability Details
CVEID: CVE-2016-0392
DESCRIPTION: IBM General Parallel File System could allow a local attacker to inject commands into setuid file parameters and execute commands as root.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112611 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
IBM Spectrum Scale V4.2.0.0 thru V4.2.0.2
IBM Spectrum Scale V4.1.1.0 thru V4.1.1.6
IBM GPFS V4.1.0.0 thru V4.1.0.8
IBM GPFS V3.5.0.0 thru V3.5.0.30
All older IBM GPFS versions no longer in service
Remediation/Fixes
For IBM Spectrum Scale V4.2.0.0 thru V4.2.0.2, apply IBM Spectrum Scale V4.2.0.3 available from Fix Central at
http://www-933.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%2Bdefined%2Bstorage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=4.2.0&platform=All&function=all
For IBM Spectrum Scale V4.1.1.0 thru 4.1.1.6 and IBM GPFS V4.1.0.0 thru V4.1.0.8, apply V4.1.1.7 athttp://www-933.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%2Bdefined%2Bstorage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=4.1.1&platform=All&function=all
For IBM GPFS V3.5.0.0 thru V3.5.0.30, apply V3.5.0.31 at
http://www-933.ibm.com/support/fixcentral/swg/selectFixes?parent=Cluster%2Bsoftware&product=ibm/power/IBM+General+Parallel+File+System&release=3.5.0&platform=All&function=all
For older versions of IBM GPFS, if you have an extended service contract, please contact IBM Service.
Workarounds and Mitigations
Until the fixes can be applied, a workaround is to remove the setuid from the files in the /usr/lpp/mmfs/bin directory. Determine the set of files with setuid bit by running
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:
mmchfileset
mmcrsnapshot
mmdelsnapshot
mmdf
mmedquota
mmgetacl
mmlsdisk
mmlsfileset
mmlsfs
mmlsmgr
mmlspolicy
mmlspool
mmlsquota
mmlssnapshot
mmputacl
mmsnapdir
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References
Acknowledgement
This vulnerability was reported to IBM by John Fitzpatrick at MWR InfoSecurity
Change History
31 May 2016: 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.
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Document Information
Modified date:
25 June 2021
UID
isg3T1023763