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Check: GEN005000

SUSE Linux Enterprise Server v11 for System z STIG: GEN005000 (in versions v1 r12 through v1 r9)

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. The Yast ‘Security and Users’ > ‘User and Group Management’ module can be used to configure the account. Or 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 /bin/false.

Additional Identifiers

Rule ID: SV-45886r1_rule

Vulnerability ID: V-4387

Group Title: GEN005000

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-000225	Employ the principle of least privilege, allowing only authorized accesses for users (or processes acting on behalf of users) which are necessary to accomplish assigned organizational tasks.

Controls

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

Number	Title
AC-6	Least Privilege