🚨 [security] Upgrade electron: 16.0.9 → 21.2.3 (major)

[depfu]

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🚨 Your current dependencies have known security vulnerabilities 🚨

This dependency update fixes known security vulnerabilities. Please see the details below and assess their impact carefully. We recommend to merge and deploy this as soon as possible!

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Here is everything you need to know about this upgrade. Please take a good look at what changed and the test results before merging this pull request.

What changed?

✳️ electron (16.0.9 → 21.2.3) · Repo

Security Advisories 🚨

🚨 Exfiltration of hashed SMB credentials on Windows via file:// redirect

Impact

When following a redirect, Electron delays a check for redirecting to file:// URLs from other schemes. The contents of the file is not available to the renderer following the redirect, but if the redirect target is a SMB URL such as file://some.website.com/, then in some cases, Windows will connect to that server and attempt NTLM authentication, which can include sending hashed credentials.

Patches

This issue has been fixed in all current stable versions of Electron. Specifically, these versions contain the fixes:

• 21.0.0-beta.1
• 20.0.1
• 19.0.11
• 18.3.7

We recommend all apps upgrade to the latest stable version of Electron.

Workarounds

If upgrading isn't possible, this issue can be addressed without upgrading by preventing redirects to file:// URLs in the WebContents.on('will-redirect') event, for all WebContents:

app.on('web-contents-created', (e, webContents) => {
  webContents.on('will-redirect', (e, url) => {
    if (/^file:/.test(url)) e.preventDefault()
  })
})

For more information

If you have any questions or comments about this advisory, email us at [email protected].

Credit

Thanks to user @coolcoolnoworries for reporting this issue.

🚨 Exfiltration of hashed SMB credentials on Windows via file:// redirect

Impact

When following a redirect, Electron delays a check for redirecting to file:// URLs from other schemes. The contents of the file is not available to the renderer following the redirect, but if the redirect target is a SMB URL such as file://some.website.com/, then in some cases, Windows will connect to that server and attempt NTLM authentication, which can include sending hashed credentials.

Patches

This issue has been fixed in all current stable versions of Electron. Specifically, these versions contain the fixes:

• 21.0.0-beta.1
• 20.0.1
• 19.0.11
• 18.3.7

We recommend all apps upgrade to the latest stable version of Electron.

Workarounds

If upgrading isn't possible, this issue can be addressed without upgrading by preventing redirects to file:// URLs in the WebContents.on('will-redirect') event, for all WebContents:

app.on('web-contents-created', (e, webContents) => {
  webContents.on('will-redirect', (e, url) => {
    if (/^file:/.test(url)) e.preventDefault()
  })
})

For more information

If you have any questions or comments about this advisory, email us at [email protected].

Credit

Thanks to user @coolcoolnoworries for reporting this issue.

🚨 Exfiltration of hashed SMB credentials on Windows via file:// redirect

Impact

When following a redirect, Electron delays a check for redirecting to file:// URLs from other schemes. The contents of the file is not available to the renderer following the redirect, but if the redirect target is a SMB URL such as file://some.website.com/, then in some cases, Windows will connect to that server and attempt NTLM authentication, which can include sending hashed credentials.

Patches

This issue has been fixed in all current stable versions of Electron. Specifically, these versions contain the fixes:

• 21.0.0-beta.1
• 20.0.1
• 19.0.11
• 18.3.7

We recommend all apps upgrade to the latest stable version of Electron.

Workarounds

If upgrading isn't possible, this issue can be addressed without upgrading by preventing redirects to file:// URLs in the WebContents.on('will-redirect') event, for all WebContents:

app.on('web-contents-created', (e, webContents) => {
  webContents.on('will-redirect', (e, url) => {
    if (/^file:/.test(url)) e.preventDefault()
  })
})

For more information

If you have any questions or comments about this advisory, email us at [email protected].

Credit

Thanks to user @coolcoolnoworries for reporting this issue.

🚨 AutoUpdater module fails to validate certain nested components of the bundle

Impact

This vulnerability allows attackers who have control over a given apps update server / update storage to serve maliciously crafted update packages that pass the code signing validation check but contain malicious code in some components.

Please note that this kind of attack would require significant privileges in your own auto updating infrastructure and the ease of that attack entirely depends on your infrastructure security.

Patches

This has been patched and the following Electron versions contain the fix:

• 18.0.0-beta.6
• 17.2.0
• 16.2.0
• 15.5.0

Workarounds

There are no workarounds for this issue, please update to a patched version of Electron.

For more information

If you have any questions or comments about this advisory, email us at [email protected].

🚨 Compromised child renderer processes could obtain IPC access without nodeIntegrationInSubFrames being enabled

Impact

This vulnerability allows a renderer with JS execution to obtain access to a new renderer process with nodeIntegrationInSubFrames enabled which in turn allows effective access to ipcRenderer.

Please note the misleadingly named nodeIntegrationInSubFrames option does not implicitly grant Node.js access rather it depends on the existing sandbox setting. If your application is sandboxed then nodeIntegrationInSubFrames just gives access to the sandboxed renderer APIs (which includes ipcRenderer).

If your application then additionally exposes IPC messages without IPC senderFrame validation that perform privileged actions or return confidential data this access to ipcRenderer can in turn compromise your application / user even with the sandbox enabled.

Patches

This has been patched and the following Electron versions contain the fix:

• 18.0.0-beta.6
• 17.2.0
• 16.2.6
• 15.5.5

Workarounds

Ensure that all IPC message handlers appropriately validate senderFrame as per our security tutorial here.

For more information

If you have any questions or comments about this advisory, email us at [email protected].

🚨 Compromised child renderer processes could obtain IPC access without nodeIntegrationInSubFrames being enabled

Impact

This vulnerability allows a renderer with JS execution to obtain access to a new renderer process with nodeIntegrationInSubFrames enabled which in turn allows effective access to ipcRenderer.

Please note the misleadingly named nodeIntegrationInSubFrames option does not implicitly grant Node.js access rather it depends on the existing sandbox setting. If your application is sandboxed then nodeIntegrationInSubFrames just gives access to the sandboxed renderer APIs (which includes ipcRenderer).

If your application then additionally exposes IPC messages without IPC senderFrame validation that perform privileged actions or return confidential data this access to ipcRenderer can in turn compromise your application / user even with the sandbox enabled.

Patches

This has been patched and the following Electron versions contain the fix:

• 18.0.0-beta.6
• 17.2.0
• 16.2.6
• 15.5.5

Workarounds

Ensure that all IPC message handlers appropriately validate senderFrame as per our security tutorial here.

For more information

If you have any questions or comments about this advisory, email us at [email protected].

🚨 Compromised child renderer processes could obtain IPC access without nodeIntegrationInSubFrames being enabled

Impact

This vulnerability allows a renderer with JS execution to obtain access to a new renderer process with nodeIntegrationInSubFrames enabled which in turn allows effective access to ipcRenderer.

Please note the misleadingly named nodeIntegrationInSubFrames option does not implicitly grant Node.js access rather it depends on the existing sandbox setting. If your application is sandboxed then nodeIntegrationInSubFrames just gives access to the sandboxed renderer APIs (which includes ipcRenderer).

If your application then additionally exposes IPC messages without IPC senderFrame validation that perform privileged actions or return confidential data this access to ipcRenderer can in turn compromise your application / user even with the sandbox enabled.

Patches

This has been patched and the following Electron versions contain the fix:

• 18.0.0-beta.6
• 17.2.0
• 16.2.6
• 15.5.5

Workarounds

Ensure that all IPC message handlers appropriately validate senderFrame as per our security tutorial here.

For more information

If you have any questions or comments about this advisory, email us at [email protected].

🚨 AutoUpdater module fails to validate certain nested components of the bundle

Impact

This vulnerability allows attackers who have control over a given apps update server / update storage to serve maliciously crafted update packages that pass the code signing validation check but contain malicious code in some components.

Please note that this kind of attack would require significant privileges in your own auto updating infrastructure and the ease of that attack entirely depends on your infrastructure security.

Patches

This has been patched and the following Electron versions contain the fix:

• 18.0.0-beta.6
• 17.2.0
• 16.2.0
• 15.5.0

Workarounds

There are no workarounds for this issue, please update to a patched version of Electron.

For more information

If you have any questions or comments about this advisory, email us at [email protected].

🚨 AutoUpdater module fails to validate certain nested components of the bundle

Impact

This vulnerability allows attackers who have control over a given apps update server / update storage to serve maliciously crafted update packages that pass the code signing validation check but contain malicious code in some components.

Please note that this kind of attack would require significant privileges in your own auto updating infrastructure and the ease of that attack entirely depends on your infrastructure security.

Patches

This has been patched and the following Electron versions contain the fix:

• 18.0.0-beta.6
• 17.2.0
• 16.2.0
• 15.5.0

Workarounds

There are no workarounds for this issue, please update to a patched version of Electron.

For more information

If you have any questions or comments about this advisory, email us at [email protected].

🚨 Renderers can obtain access to random bluetooth device without permission in Electron

Impact

This vulnerability allows renderers to obtain access to a random bluetooth device via the web bluetooth API if the app has not configured a custom select-bluetooth-device event handler. The device that is accessed is random and the attacker would have no way of selecting a specific device.

All current stable versions of Electron are affected.

Patches

This has been patched and the following Electron versions contain the fix:

• 17.0.0-alpha.6
• 16.0.6
• 15.3.5
• 14.2.4
• 13.6.6

Workarounds

Adding this code to your app can workaround the issue.

app.on('web-contents-created', (event, webContents) => {
  webContents.on('select-bluetooth-device', (event, devices, callback) => {
    // Prevent default behavior
    event.preventDefault();
    // Cancel the request
    callback('');
  });
});

For more information
If you have any questions or comments about this advisory, email us at [email protected].

Release Notes

Too many releases to show here. View the full release notes.

Commits

See the full diff on Github. The new version differs by 3 commits:

• docs: fix driverId -> deviceId typo (#36270)
• chore: cherry-pick 67c9cbc784d6 from chromium (#36219)
• chore: cherry-pick eef098d1c7d5 from webrtc (#36216)

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