Title

The smb.conf file must use the hosts option to restrict access to Samba. (Cat II impact)

Discussion

Samba increases the attack surface of the system and must be restricted to communicate only with systems requiring access.

Check Content

Examine the smb.conf file. Default locations for this file include /etc, /etc/sfw, /etc/samba, and /etc/sfw/samba. If the system has Samba installed in non-standard locations, also check the smb.conf in those locations. Procedure: # more /etc/smb.conf /etc/sfw/smb.conf /etc/samba/smb.conf /etc/sfw/samba/smb.conf If the hosts option is not present to restrict access to a list of authorized hosts and networks, this is a finding.

Fix Text

Edit the smb.conf file and set the hosts option to permit only authorized hosts to access Samba.

Additional Identifiers

Rule ID: SV-227026r603265_rule

Vulnerability ID: V-227026

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

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