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models: add lockdown default configuration files #1530

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Apr 29, 2021
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models: add lockdown default configuration files #1530

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4e6b5a5
models: add lockdown default configuration files
arnaldo2792 Apr 28, 2021
fc416bf
docs: update security guidance document
arnaldo2792 Apr 28, 2021
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4 changes: 2 additions & 2 deletions SECURITY_GUIDANCE.md
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Expand Up @@ -113,10 +113,10 @@ Modifications to the running kernel could bypass or subvert these mechanisms.
Bottlerocket enables the Lockdown security module and offers settings to choose from one of three modes.

The first mode, "none", effectively disables the protection.
This is the default in today's [variants](variants/) of Bottlerocket, for compatibility with existing deployments.
This is the default in older [variants](variants/) of Bottlerocket, for compatibility with existing deployments.

The second mode, "integrity", blocks most ways to overwrite the kernel's memory and modify its code.
This will become the default in future variants.
This is the default in newer variants.
Enabling this mode will prevent unsigned kernel modules from being loaded.

The third mode, "confidentiality", stops most ways of reading the kernel's memory from userspace.
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3 changes: 0 additions & 3 deletions sources/models/shared-defaults/defaults.toml
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Expand Up @@ -94,9 +94,6 @@ affected-services = ["chronyd"]

# Kernel

[settings.kernel]
lockdown = "none"

[services.sysctl]
configuration-files = []
restart-commands = ["/usr/bin/corndog sysctl"]
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3 changes: 3 additions & 0 deletions sources/models/shared-defaults/lockdown-none.toml
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@@ -0,0 +1,3 @@
# Kernel
[settings.kernel]
lockdown = "none"
1 change: 1 addition & 0 deletions sources/models/src/aws-dev/defaults.d/51-lockdown-none.toml
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../../../shared-defaults/lockdown-none.toml
1 change: 1 addition & 0 deletions sources/models/src/aws-ecs-1/defaults.d/51-lockdown-integrity.toml
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../../../shared-defaults/lockdown-integrity.toml
1 change: 1 addition & 0 deletions sources/models/src/aws-k8s-1.19/defaults.d/51-lockdown-none.toml
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../../../shared-defaults/lockdown-none.toml
1 change: 1 addition & 0 deletions sources/models/src/vmware-dev/defaults.d/51-lockdown-none.toml
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../../../shared-defaults/lockdown-none.toml