The system must be checked weekly for unauthorized setgid files as well as unauthorized modification to authorized setgid files.

From SUSE Linux Enterprise Server v11 for System z

Associated with: CCI-000318

SV-45200r2_rule The system must be checked weekly for unauthorized setgid files as well as unauthorized modification to authorized setgid files.

Vulnerability discussion

Files with the setgid bit set will allow anyone running these files to be temporarily assigned the group id of the file. While many system files depend on these attributes for proper operation, security problems can result if setgid is assigned to programs allowing reading and writing of files, or shell escapes.

Check content

Determine if a weekly automated or manual process is used to generate a list of sgid files on the system and compare it with the prior list. If no such process is in place, this is a finding. NOTE: For MAC I systems, increase the frequency to daily.

Fix text

Establish a weekly automated or manual process to generate a list of sgid files on the system and compare it with the prior list. To create a list of sgid files: # find / -perm -2000 > suid-file-list NOTE: For MAC I systems, increase the frequency to daily.

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