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fix(electron): restrict the storage token file to owner-only access - #9971
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🦋 Changeset detectedLatest commit: 55c603c The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. 📝 WalkthroughWalkthroughElectron storage configures token files with mode Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to An existing token file may remain accessible to other local users after storage initializes. Handle permission failures before merging the owner-only access change. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @packages/electron/src/storage/index.ts:
- Around line 135-137: Update the catch around chmodSync in storage() to ignore
only ENOENT and surface or prevent use of the file for all other errors. Add a
test verifying that a non-ENOENT chmodSync failure is not silently accepted.
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.changeset/electron-token-file-mode.mdpackages/electron/src/storage/__tests__/index.test.tspackages/electron/src/storage/index.ts
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| '@clerk/electron': patch | ||
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| The token file written by `storage()` from `@clerk/electron/storage` is now readable and writable only by its owner (`0600`). It was previously world-writable (`0666`). Existing token files are updated the next time `storage()` is called. |
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I don't think the file was actually world-writable before. conf@10.2.0 defaults configFileMode to 0o666, but that's the mode passed when the file is created, so the process umask still applies. With the usual 022 umask the file ends up 0644: world-readable, not world-writable. Could the changeset (and the PR description) say "world-readable" instead? The changeset is what users read in the changelog, and "world-writable" sounds like other users could have tampered with the tokens.
| The token file written by `storage()` from `@clerk/electron/storage` is now readable and writable only by its owner (`0600`). It was previously world-writable (`0666`). Existing token files are updated the next time `storage()` is called. | |
| The token file written by `storage()` from `@clerk/electron/storage` is now readable and writable only by its owner (`0600`). It was previously world-readable (`0644` under the default umask). Existing token files are updated the next time `storage()` is called. |
🤖 Generated with Claude Code
| try { | ||
| chmodSync(store.path, 0o600); | ||
| } catch { | ||
| /* the file does not exist yet, or it belongs to another user */ | ||
| } |
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This catch swallows every error, but ENOENT is the only one we expect here. If chmodSync fails with EPERM/EACCES (e.g. the file was created by another user via a sudo run, or the filesystem doesn't support chmod), the existing token file stays world-readable and nothing reports it. Later writes won't fix it on the non-atomic fs.writeFileSync path either, since mode only applies when a file is created. What about catching only ENOENT and warning on anything else? warnOnce is declared further down in storage(), so this uses console.warn directly; it only runs once per storage() call anyway.
| try { | |
| chmodSync(store.path, 0o600); | |
| } catch { | |
| /* the file does not exist yet, or it belongs to another user */ | |
| } | |
| try { | |
| chmodSync(store.path, 0o600); | |
| } catch (error) { | |
| if ((error as NodeJS.ErrnoException).code !== 'ENOENT') { | |
| console.warn('Clerk: failed to restrict the token file to owner-only access; it may be readable by other users.'); | |
| } | |
| } |
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Description
The token file written by
storage()was world-writable (0666). It is now0600, and existing files are tightened whenstorage()runs.Checklist
pnpm testruns as expected.pnpm buildruns as expected.Type of change