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Check: GEN007260

SUSE Linux Enterprise Server v11 for System z STIG: GEN007260 (in versions v1 r12 through v1 r9)

Title

The AppleTalk protocol must be disabled or not installed. (Cat II impact)

Discussion

The AppleTalk suite of protocols is no longer in common use. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.

Check Content

Verify the AppleTalk protocol handler is prevented from dynamic loading. # grep 'install appletalk' /etc/modprobe.conf /etc/modprobe.conf.local /etc/modprobe.d/* | grep ‘/bin/true’ If no result is returned, this is a finding.

Fix Text

Prevent the AppleTalk protocol handler for dynamic loading. # echo "install appletalk /bin/true" >> /etc/modprobe.conf.local

Additional Identifiers

Rule ID: SV-45973r1_rule

Vulnerability ID: V-22524

Group Title: GEN007260

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-000382	The organization configures the information system to prohibit or restrict the use of organization-defined functions, ports, protocols, and/or services.

Controls

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

Number	Title
CM-7	Least Functionality