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.
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
Ensure that all IPC message handlers appropriately validate senderFrame
as per our security tutorial here.
If you have any questions or comments about this advisory, email us at [email protected].