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Check: GEN007760

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN007760 (in versions v1 r14 through v1 r10)

Title

Proxy Neighbor Discovery Protocol (NDP) must not be enabled on the system. (Cat II impact)

Discussion

Proxy Neighbor Discovery Protocol (NDP) allows a system to respond to NDP requests on one interface on behalf of hosts connected to another interface. If this function is enabled when not required, addressing information may be leaked between the attached network segments.

Check Content

If the system does not support proxy NDP, this is not applicable. Determine if the system has proxy NDP enabled. If IPv6 is enabled, determine if any non-local published NDP entries exist on the system. # ndp -a If any NDP entries contain non-local published entries, this is a finding.

Fix Text

Remove non-local published NDP entries from the system. # ndp -d <host> Check system startup scripts for commands publishing NDP entries (such as "ndp -s <int> <host> <hwaddr> pub") and remove them.

Additional Identifiers

Rule ID: SV-38925r1_rule

Vulnerability ID: V-22544

Group Title: GEN007760

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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