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Check: GEN002200

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN002200 (in versions v1 r14 through v1 r10)

Title

All shell files must be owned by root or bin. (Cat II impact)

Discussion

If shell files are owned by users other than root or bin, they could be modified by intruders or malicious users to perform unauthorized actions.

Check Content

Obtain a list of system shells from /etc/security/login.cfg and check the ownership of these shells. Procedure: #grep shells /etc/security/login.cfg | grep -v \* | cut -f 2 -d = | sed s/,/\ /g | xargs -n1 ls -l If any shell is not owned by root or bin, this is a finding. Obtain a list of system shells from /etc/shells and check the ownership of these shells. Procedure: #cat /etc/shells | xargs -n1 ls -l If any shell is not owned by root or bin, this is a finding.

Fix Text

Change the ownership of the shell with incorrect ownership. # chown root < shell >

Additional Identifiers

Rule ID: SV-38847r1_rule

Vulnerability ID: V-921

Group Title: GEN002200

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