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← Back to IBM AIX 7.x Security Technical Implementation Guide

V-215409

CAT II (Medium)

AIX public directories must be the only world-writable directories and world-writable files must be located only in public directories.

Rule ID

SV-215409r991589_rule

STIG

IBM AIX 7.x Security Technical Implementation Guide

Version

V3R2

CCIs

CCI-000366

Discussion

World-writable files and directories make it easy for a malicious user to place potentially compromising files on the system. The only authorized public directories are those temporary directories supplied with the system or those designed to be temporary file repositories. The setting is normally reserved for directories used by the system and by users for temporary file storage (e.g., /tmp) and for directories requiring global read/write access.

Check Content

Check the system for world-writable files and directories by running command:
# find / -perm -2 -a \( -type d -o -type f \) -exec ls -ld {} \; 

If any world-writable files or directories are located, except those required for proper system or application operation, such as "/tmp" and "/dev/null", this is a finding.

Fix Text

Remove or change the mode for any world-writable file or directory on the system that is not required to be world-writable by running command: 
# chmod o-w <file/directory> 

Document all changes.