OpenSolaris

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Bug ID 6600944
Synopsis Setting a group as owner is not properly supported
State 10-Fix Delivered (Fix available in build)
Category:Subcategory kernel:cifs
Keywords
Responsible Engineer Afshin Ardakani
Reported Against
Duplicate Of
Introduced In solaris_nevada
Commit to Fix snv_100
Fixed In snv_100
Release Fixed solaris_nevada(snv_100)
Related Bugs 6607916 , 6617183 , 6617882 , 6744317 , 6754023 , 6757132
Submit Date 5-September-2007
Last Update Date 8-October-2008
Description 
In Windows users and groups share the same ID (SID) space which means any SID can be assigned as a file's owner or group because a SID doesn't have any user/group association.
This is not the case in Solaris.

Currently CIFS service doesn't check this so a file might endup with a gid in its uid slot. This could be considered a security issue. A proper solution will involve the idmap service. For the time being an option would be to reject such requests that try to set a group as owner or a user as the primary group.
Work Around 
N/A
Comments 
N/A