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Check: GEN005000

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN005000 (in versions v1 r14 through v1 r10)

Title

Anonymous FTP accounts must not have a functional shell. (Cat I impact)

Discussion

If an anonymous FTP account has been configured to use a functional shell, attackers could gain access to the shell if the account is compromised.

Check Content

Check the shell for the anonymous FTP account. Procedure: # grep "^ftp" /etc/passwd This is a finding if the seventh field is empty (the entry ends with a ':') or if the seventh field does not contain one of the following. /bin/false /dev/null /usr/bin/false /bin/true /sbin/nologin

Fix Text

Configure anonymous FTP accounts to use a non-functional shell. If necessary, edit the /etc/passwd file to remove any functioning shells associated with the FTP account and replace them with non-functioning shells, such as, /dev/null.

Additional Identifiers

Rule ID: SV-4387r2_rule

Vulnerability ID: V-4387

Group Title: GEN005000

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