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Check: GEN005180

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN005180 (in versions v1 r14 through v1 r10)

Title

All .Xauthority files must have mode 0600 or less permissive. (Cat II impact)

Discussion

.Xauthority files ensure the user is authorized to access the specific X Windows host. Excessive permissions may permit unauthorized modification of these files, which could lead to Denial of Service to authorized access or allow unauthorized access to be obtained.

Check Content

Check the file permissions for the .Xauthority files in the home directories of users of X. Procedure: # cd ~<X user> # ls -lL .Xauthority If the file mode is more permissive than 0600, this is finding.

Fix Text

Change the mode of the .Xauthority files. Procedure: # chmod 0600 .Xauthority

Additional Identifiers

Rule ID: SV-12515r2_rule

Vulnerability ID: V-12014

Group Title: GEN005180

Expert Comments

Expert comments are only available to logged-in users.

CCIs

CCIs tied to check.

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

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-6	Least Privilege