Impact
This vulnerability allows a sandboxed renderer to request a "thumbnail" image of an arbitrary file on the user's system. The thumbnail can potentially include significant parts of the original file, including textual data in many cases.
All current stable versions of Electron are affected.
Patches
This was fixed with #30728, and the following Electron versions contain the fix:
- 15.0.0-alpha.10
- 14.0.0
- 13.3.0
- 12.1.0
- 11.5.0
Workarounds
If your app enables contextIsolation, this vulnerability is significantly more difficult for an attacker to exploit.
Further, if your app does not depend on the createThumbnailFromPath API, then you can simply disable the functionality. In the main process, before the 'ready' event:
delete require('electron').nativeImage.createThumbnailFromPathFor more information
If you have any questions or comments about this advisory, email us at security@electronjs.org.
nornagon Analyst
Impact
This vulnerability allows a sandboxed renderer to request a "thumbnail" image of an arbitrary file on the user's system. The thumbnail can potentially include significant parts of the original file, including textual data in many cases.
All current stable versions of Electron are affected.
Patches
This was fixed with #30728, and the following Electron versions contain the fix:
Workarounds
If your app enables
contextIsolation, this vulnerability is significantly more difficult for an attacker to exploit.Further, if your app does not depend on the
createThumbnailFromPathAPI, then you can simply disable the functionality. In the main process, before the 'ready' event:For more information
If you have any questions or comments about this advisory, email us at security@electronjs.org.