TMA-SAFARI-3.3
Ensure 'AutoFill web forms: Other forms' is 'Disabled'
Description
Safari can store the information typed in forms for later use on other websites. It is recommended that Safari be configured such that it does not store and auto-fill form contents. Rationale: If Safari or other applications executing at equal or higher security contexts is compromised, potentially sensitive, persisted, form data is at increased risk. Audit reads AutoFillMiscellaneousForms from the com.apple.Safari preference domain of the account running the scan (the PDF checks the same token in com.apple.Safari.plist; manual check: Follow the below steps and verify that AutoFill web forms: Other forms is Disabled: 1. Click Safari. 2. Click Preferences. 3. Click AutoFill. 4. Verify AutoFill web forms: Other forms is unchecked.). Safari is sandboxed, so the reading process needs Full Disk Access on macOS 10.14+. A missing key exits non-zero and is reported as FAIL even where the built-in default is compliant. Values forced by a configuration profile live in /Library/Managed Preferences and are not read here.
How it is checked
Audit method: Shell command
out=$(defaults read com.apple.Safari AutoFillMiscellaneousForms 2>/dev/null) || exit 1; printf '%s\n' "$out"- Expected output
0
How it is fixed
Fix method: Guidance or infrastructure patch
Follow the below steps to set AutoFill web forms: Other forms to Disabled: 1. Click Safari. 2. Click Preferences. 3. Click AutoFill. 4. Uncheck AutoFill web forms: Other forms. Or deploy a configuration profile for com.apple.Safari setting AutoFillMiscellaneousForms = false, or as the logged-in user run: defaults write com.apple.Safari AutoFillMiscellaneousForms -bool false and restart Safari.
Properties
- Operating systems
- Any
- Tags
- safaribrowsercis-l2
- Reference
- CIS macOS Safari Benchmark v2.0.0 - 3.3 Ensure 'AutoFill web forms: Other forms' is 'Disabled'
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
tmaegis scan --target safari --level 2