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Check: GEN007660

SUSE Linux Enterprise Server v11 for System z STIG: GEN007660 (in versions v1 r12 through v1 r9)

Title

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

Discussion

Bluetooth is a Personal Area Network (PAN) technology. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the kernel to dynamically load a protocol handler by opening a socket using the protocol.

Check Content

Verify the Bluetooth protocol handler is prevented from dynamic loading. # grep 'install bluetooth' /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 Bluetooth protocol handler for dynamic loading. # echo "install bluetooth /bin/true" >> /etc/modprobe.conf.local

Additional Identifiers

Rule ID: SV-45979r1_rule

Vulnerability ID: V-22539

Group Title: GEN007660

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-001551	The organization defines approved authorizations for controlling the flow of information between interconnected systems.

Controls

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

Number	Title
AC-4	Information Flow Enforcement