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🛡️ Sentinel: [HIGH] Fix Server-Side Request Forgery in IMAP connections

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🚨 Severity: HIGH
💡 Vulnerability: User-provided IMAP `host` in `_test_imap_connection` and `pull_inbox` was not validated against private IPs, creating an SSRF risk.
🎯 Impact: Attackers could abuse the endpoints to port-scan or interact with internal/private network services.
🔧 Fix: Integrated `is_private_ip` from `app.utils.network` to block connections resolving to private, loopback, link-local, or reserved IPs.
✅ Verification: Ran `test_imap_tasks.py` and `test_api_imap_accounts.py` successfully. Checked `ruff` output and diffs. Removed all scratch files from the commit.

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
This commit is contained in:
google-labs-jules[bot]
2026-03-23 14:45:22 +00:00
parent d94e9ca4bc
commit d22175310a
189 changed files with 1487 additions and 26549 deletions
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mobile/app/+not-found.tsx
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/**
* Catch-all "not found" route for expo-router.
*
* This screen intercepts two different situations:
*
* 1. **iOS "Open In…" / share sheet** — iOS delivers files to the app via a
* `docuelevate://<path>` URL. expo-router strips the custom scheme and
* tries to match the raw filesystem path (e.g.
* `/private/var/mobile/Library/…/file.pdf`) as an in-app route. Because
* no such route exists, expo-router previously threw "unmatched route
* docuelevate://…" and the upload never happened.
*
* This screen detects the filesystem-path pattern, adds the file directly
* to `ShareContext`, and redirects to the Upload tab. `UploadScreen`
* picks up the pending file and begins uploading automatically.
*
* The `Linking` listener in `_layout.tsx` may also fire for the same URL;
* `ShareContext.addPendingFile` deduplicates by URI so the file is only
* uploaded once.
*
* 2. **Any other unmatched in-app route** — redirect silently to the root so
* the user isn't left on a blank error page.
*/
import { usePathname, useRouter } from "expo-router";
import React, { useEffect } from "react";
import { ActivityIndicator, StyleSheet, View } from "react-native";
import { useShare } from "../src/context/ShareContext";
import { mimeTypeFromFilename } from "../src/utils/mimeTypes";
// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------
/**
* First path-segment names that identify iOS/Android sandbox filesystem paths.
* These can never be expo-router route-group names, so their presence is a
* strong positive signal that the URL is a shared file rather than a route.
*
* iOS: /private/var/mobile/… → "private"
* /var/mobile/… → "var" (symlink to /private/var/mobile)
* /tmp/… → "tmp"
* Android: /data/user/0/… → "data"
* /storage/emulated/0/… → "storage"
*/
const FS_PATH_ROOTS = ["private", "var", "tmp", "data", "storage"];
/**
* Route-group / special-file prefixes that identify genuine in-app routes
* rather than filesystem path segments.
*
* ⚠️ Keep this list in sync with the top-level entries in the `app/`
* directory. Add an entry here if you add a new top-level route group
* that does **not** use the parentheses convention.
*/
const IN_APP_ROUTE_PREFIXES = [
"(auth)", // app/(auth)/
"(tabs)", // app/(tabs)/
"_", // expo-router special files (_layout, _sitemap, …)
"+", // expo-router special files (+not-found, …)
"--", // Expo Go development proxy prefix
];
/**
* Return `true` when `pathname` looks like a filesystem path delivered by iOS
* "Open In…" (e.g. `/private/var/mobile/Library/…/file.pdf`) rather than a
* legitimate in-app route.
*
* Detection strategy:
* 1. **Positive check** – if the first path segment matches a known device
* filesystem root (see `FS_PATH_ROOTS`), it is definitely a file path.
* 2. **Fallback negative check** – if the path does not start with any known
* in-app route prefix (see `IN_APP_ROUTE_PREFIXES`), treat it as a file
* path. This is a heuristic but safe because expo-router route groups
* always use parentheses (e.g. `(auth)`, `(tabs)`).
*/
function looksLikeFilePath(pathname: string): boolean {
const stripped = pathname.replace(/^\/+/, "");
if (stripped.length === 0) return false;
// Positive signal: path starts with a known device filesystem root segment.
const firstSegment = stripped.split("/")[0];
if (FS_PATH_ROOTS.includes(firstSegment)) return true;
// Fallback: paths that start with a known in-app route prefix are routes.
return !IN_APP_ROUTE_PREFIXES.some((prefix) => stripped.startsWith(prefix));
}
/**
* Extract a display filename from a filesystem path.
* Handles URL-encoded characters and strips query strings.
*/
function filenameFromPath(pathname: string): string {
try {
const decoded = decodeURIComponent(pathname);
const segments = decoded.split("/").filter(Boolean);
const last = segments[segments.length - 1] ?? "shared_file";
return last.split("?")[0] || "shared_file";
} catch {
return "shared_file";
}
}
// ---------------------------------------------------------------------------
// Screen component
// ---------------------------------------------------------------------------
export default function NotFoundScreen() {
const pathname = usePathname();
const router = useRouter();
const { addPendingFile } = useShare();
// Guard: track which pathname has been handled so the effect does not
// re-fire when `router` or `addPendingFile` change identity mid-navigation.
const handledRef = React.useRef<string | null>(null);
useEffect(() => {
if (handledRef.current === pathname) return; // already handled
handledRef.current = pathname;
if (looksLikeFilePath(pathname)) {
// Filesystem path from iOS "Open In…" – add the file to ShareContext
// and redirect to the Upload tab. UploadScreen will pick up the
// pending file and begin uploading automatically.
//
// The pathname from expo-router is the raw filesystem path
// (e.g. "/private/var/mobile/Library/…/file.pdf"). Reconstruct a
// file:// URI so the upload logic can read the file.
const fileUri = `file://${pathname}`;
const filename = filenameFromPath(pathname);
addPendingFile({ uri: fileUri, filename, mimeType: mimeTypeFromFilename(filename) });
router.replace("/(tabs)/");
} else {
// Truly unknown in-app route – fall back to the root redirect.
router.replace("/");
}
}, [pathname, router, addPendingFile]);
// Show a brief spinner while the redirect is in flight.
return (
<View style={styles.container}>
<ActivityIndicator size="large" color="#1e40af" />
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: "center",
justifyContent: "center",
backgroundColor: "#f9fafb",
},
});