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fix(shadow-utils): configure CIS account aging defaults #18652
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Lynsey Rydberg (corvus-callidus)
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23 changes: 23 additions & 0 deletions
23
base/comps/shadow-utils/overlays/0001-configure-cis-account-aging.overlay.toml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| [metadata] | ||
| category = "azl-security-compliance" | ||
| upstream-status = "inapplicable" | ||
| bugs = [ | ||
| { url = "https://dev.azure.com/mariner-org/mariner/_workitems/edit/22929" }, | ||
| { url = "https://dev.azure.com/mariner-org/mariner/_workitems/edit/22930" }, | ||
| ] | ||
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| # These defaults apply only when useradd creates an account; existing platform | ||
| # accounts retain their current aging policy. | ||
| [[overlays]] | ||
| description = "Set the CIS maximum password age for new accounts" | ||
| type = "file-search-replace" | ||
| file = "shadow-utils.login.defs" | ||
| regex = '(?m)^PASS_MAX_DAYS\s+\d+$' | ||
| replacement = "PASS_MAX_DAYS\t365" | ||
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| [[overlays]] | ||
| description = "Lock inactive password accounts after the CIS grace period" | ||
| type = "file-search-replace" | ||
| file = "shadow-utils.useradd" | ||
| regex = '(?m)^INACTIVE=-?\d+$' | ||
| replacement = "INACTIVE=30" | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| [components.shadow-utils] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,7 +1,7 @@ | ||
| # useradd defaults file | ||
| GROUP=100 | ||
| HOME=/home | ||
| INACTIVE=-1 | ||
| INACTIVE=30 | ||
| EXPIRE= | ||
| SHELL=/bin/bash | ||
| SKEL=/etc/skel | ||
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question (blocking): What happens for key-only SSH users?
Copilot seems to flag that for key-only users (password-auth disabled), after 365 days, OpenSSH will change into the password update mode. And since the key-only user has no current password, they wouldn't be able to change the password, and after 30 more days, they'd get locked out fully. This key-only user creation is also our default setup in Azure VMs with cloud-init user provisioning.