Severity Framework
Snyk CCSS
Rule category
Containers / Capabilities
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- Snyk ID SNYK-CC-00108
- credit Snyk Research Team
Description
ECS task definitions should not add Linux capabilities beyond defaults and should drop 'NET_RAW'. Adding capabilities allows users to grant some superuser permissions to a process without running that process as root. Either drop 'NET_RAW' and do not add any other capabilities, or drop 'ALL' and only add back the capabilities that you need.
How to fix?
In the container_definitions block, set linuxParameters.capabilities.drop to include NET_RAW or ALL. If set to ALL, ensure NET_RAW is not included in linuxParameters.capabilities.add.
Example Configuration
resource "aws_ecs_task_definition" "valid_drop_net_raw_only" {
family = "valid_drop_net_raw_only"
container_definitions = <<EOF
[
{
"name": "valid_drop_net_raw_only",
"image": "hello-world",
"memory": 128,
"linuxParameters": {
"capabilities": {
"drop": ["NET_RAW"]
}
}
}
]
EOF
requires_compatibilities = ["EC2"]
}