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Check: GEN007540

SUSE Linux Enterprise Server v11 for System z STIG: GEN007540 (in versions v1 r12 through v1 r9)

Title

The Transparent Inter-Process Communication (TIPC) protocol must be disabled or uninstalled. (Cat II impact)

Discussion

The TIPC protocol is a relatively new cluster communications protocol developed by Ericsson. 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 TIPC protocol handler is prevented from dynamic loading. # grep 'install tipc' /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 TIPC protocol handler for dynamic loading. # echo "install tipc /bin/true" >> /etc/modprobe.conf.local

Additional Identifiers

Rule ID: SV-45977r1_rule

Vulnerability ID: V-22533

Group Title: GEN007540

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