Vulnerability · Published Oct 12, 2021 · Assigned by GitHub_M
CVE-2021-39184Sandboxed renderers can obtain thumbnails of arbitrary files through the nativeImage API
Medium 6.8
In plain English
A medium-severity security flaw in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. A vulnerability in versions prior to 11.5.0, 12.1.0, and 13.3.0 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. Versions 15.0.0-alpha.10, 14.0.0, 13.3.0, 12.1.0, and 11.5.0 all contain a fix for the vulnerability. Two workarounds aside from upgrading are available. One may make the vulnerability significantly more difficult for an attacker to exploit by enabling `contextIsolation` in one's app. One may also disable the functionality of the `createThumbnailFromPath` API if one does not need it.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | electron | 11.5.0 | GHSA-mpjm-v997-c4h4 |
| npm | electron | 12.1.0 | GHSA-mpjm-v997-c4h4 |
| npm | electron | 13.3.0 | GHSA-mpjm-v997-c4h4 |
Affected products (as reported)
Weakness: CWE-668 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
References
- https://github.com/electron/electron/security/advisories/GHSA-mpjm-v997-c4h4 x_refsource_CONFIRM
- https://github.com/electron/electron/pull/30728 x_refsource_MISC