Check: GEN002300
AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE:
GEN002300
(in versions v1 r14 through v1 r10)
Title
Device files used for backup must only be readable and/or writable by root or the backup user. (Cat II impact)
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 (Typical backup devices for tape are/dev/rmt* and cd/dvd writers are /dev/cd*).
Fix Text
Use the chmod command to remove the world-writable bit from the backup device files. Procedure: # chmod o-w <back device filename> Document all changes.
Additional Identifiers
Rule ID: SV-38745r1_rule
Vulnerability ID: V-925
Group Title: GEN002300
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000225 |
The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions. |
Controls
| Number | Title |
|---|---|
| AC-6 |
Least Privilege |