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Check: GEN003608

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN003608 (in versions v1 r14 through v1 r10)

Title

Proxy ARP must not be enabled on the system. (Cat II impact)

Discussion

Proxy ARP allows a system to respond to ARP 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

Determine if the system has proxy ARP enabled. Check Content: Check the system for non-local published ARP entries. # arp -a If any entries are listed as published, this is a finding.

Fix Text

Remove any non-local published ARP entries. # arp -d < host > Check system initialization scripts for any commands configuring published ARP entries (such as "arp -s <host> <addr> pub") and remove them.

Additional Identifiers

Rule ID: SV-38867r1_rule

Vulnerability ID: V-22415

Group Title: GEN003608

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