Device files used for backup must only be readable and/or writable by root or the backup user.

From SOLARIS 10 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECCD-2, ECCD-1

Associated with: CCI-000225

SV-925r2_rule Device files used for backup must only be readable and/or writable by root or the backup user.

Vulnerability discussion

System backups could be accidentally or maliciously overwritten and destroy the ability to recover the system if a compromise should occur. Unauthorized users could also copy system files.

Check content

Check the system for world-writable device files. Procedure: # find / -perm -2 -a \( -type b -o -type c \) -exec ls -ld {} \; If any device file(s) used for backup are writable by users other than root, this is a finding.

Fix text

Use the chmod command to remove the world-writable bit from the backup device files. Procedure: # chmod o-w backdevicefilename Document all changes.

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