3.1.3 Ensure network interfaces are not in promiscuous mode

Information

Network interfaces configured on the operating system must not be in promiscuous mode.

Rationale:

Network interfaces in promiscuous mode allow for the capture of all network traffic visible to the system. If unauthorized individuals can access these applications, it may allow then to collect information such as logon IDs, passwords, and key exchanges between systems.

If the system is being used to perform a network troubleshooting function, the use of these tools must be documented with the Information System Security Officer (ISSO) and restricted to only authorized personnel.

Solution

Configure network interfaces to turn off promiscuous mode unless approved and documented.
Set the promiscuous mode of an interface to off with the following command:

#ip link set dev <devicename> multicast off promisc off

Notes:

This Benchmark recommendation maps to:

Red Hat Enterprise Linux 7 Security Technical Implementation Guide:

Version 2, Release: 3 Benchmark Date: 26 Apr 2019



Vul ID: V-72295

Rule ID: SV-86919r2_rule

STIG ID: RHEL-07-040670

Severity: CAT II

See Also

https://workbench.cisecurity.org/files/2688

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-7b.

Plugin: Unix

Control ID: 5fcc5f034660b00235db5161b1ed2f6c2fe8cdfa5ee517af823437f3246b380c