CVE-2021-39184
Electron's sandboxed renderers can obtain thumbnails of arbitrary files through the nativeImage API
Impact
### 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: ```js delete require('electron').nativeImage.createThumbnailFromPath ``` ### For more information If you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org).
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | electron | < 11.5.0 | 11.5.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Electronjs | Electron | from 10.1.0 before 11.5.0 from 12.0.0 before 12.1.0 from 13.0.0 before 13.3.0 Versions 14.0.0, 15.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/electron/electron/pull/30728
- https://github.com/electron/electron/security/advisories/GHSA-mpjm-v997-c4h4
- https://github.com/advisories/GHSA-mpjm-v997-c4h4
- https://nvd.nist.gov/vuln/detail/CVE-2021-39184
- https://github.com/electron/electron/pull/30728/commits/8fed645bd671f359ee52d806c075ec4e07eda17f