🔒 Fix Intent URL Validation & SSRF Vulnerability #32
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… confirmation - Remove automatic library addition for external `ACTION_VIEW` intents. - Implement `UrlSecurity` to block private IPs and non-HTTP schemes (SSRF mitigation). - Add `ExternalUrlConfirmationDialog` to prompt user consent before loading external links. - Hoist dialog state to `MainActivity` to ensure visibility regardless of current screen. - Update `ReaderViewModel` to manage external URL request state. Co-authored-by: Aatricks <[email protected]>
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Aatricks
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This PR addresses a security vulnerability where
MainActivityblindly accepted and scraped URLs viaACTION_VIEWintents, potentially allowing malicious apps to pollute the library or trigger SSRF attacks by pointing the scraper to local network resources.Changes:
UrlSecurityutility to reject private IP addresses (192.168.x.x, 10.x.x.x, etc.) and loopback addresses, ensuring the scraper only targets public web content.ExternalUrlConfirmationDialog. When an external link is received, the app now prompts the user ("Open this link in Reader?") instead of acting immediately.libraryViewModel.addIteminMainActivity. External links are now opened in "Preview Mode" and are not automatically saved to the persistent library database, preventing library pollution.MainActivity(Compose root) to ensure the dialog is visible even if the user was on a different screen (e.g., Explore) when the intent was received. Upon confirmation, the app navigates to theReaderScreen.UrlSecurityTestto verify IP blocking logic.PR created automatically by Jules for task 862430617499026646 started by @Aatricks