Pipeline: 7.3 Ensure that UDP access from the Internet is evaluated and restricted

Description

Network security groups should be periodically evaluated for port misconfigurations. Where certain ports and protocols may be exposed to the Internet, they should be evaluated for necessity and restricted wherever they are not explicitly required.

The potential security problem with broadly exposing UDP services over the Internet is that attackers can use DDoS amplification techniques to reflect spoofed UDP traffic from Azure Virtual Machines. The most common types of these attacks use exposed DNS, NTP, SSDP, SNMP, CLDAP and other UDP-based services as amplification sources for disrupting services of other machines on the Azure Virtual Network or even attack networked devices outside of Azure.

Remediation

Where UDP is not explicitly required and narrowly configured for resources attached to the Network Security Group, Internet-level access to your Azure resources should be restricted or eliminated.

For internal access to relevant resources, configure an encrypted network tunnel such as:

Default Value

By default, UDP access from internet is not enabled.

Run the pipeline

To run this pipeline from your terminal:

flowpipe pipeline run azure_cis.pipeline.cis_v300_7_3

Use this pipeline

To call this pipeline from your pipeline, use a step:

step "pipeline" "step_name" {
  pipeline = azure_cis.pipeline.cis_v300_7_3  
}

Params

Name	Type	Required	Description	Default
database	connection.steampipe	Yes	Database connection string.	`connection.steampipe.default`
notifier	notifier	Yes	The name of the notifier to use for sending notification messages.	`notifier.default`
notification_level	string	Yes	The verbosity level of notification messages to send. Valid options are 'verbose', 'info', 'error'.	`info`
approvers	list(notifier)	Yes	List of notifiers to be used for obtaining action/approval decisions.	`notifier.default`

Outputs

This pipeline has no outputs.