VulnerabilityModified

CVE-2023-29198

This is a context isolation bypass, meaning that code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions.

HIGH 8.5EPSS 0.59%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.59%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Electron is a framework which lets you write cross-platform desktop applications using JavaScript, HTML and CSS. Electron apps using `contextIsolation` and `contextBridge` are affected. This is a context isolation bypass, meaning that code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions. This issue is only exploitable if an API exposed to the main world via `contextBridge` can return an object or array that contains a javascript object which cannot be serialized, for instance, a canvas rendering context. This would normally result in an exception being thrown `Error: object could not be cloned`. The app side workaround is to ensure that such a case is not possible. Ensure all values returned from a function exposed over the context bridge are supported. This issue has been fixed in versions `25.0.0-alpha.2`, `24.0.1`, `23.2.3`, and `22.3.6`.

CVSS 3.1: 8.5 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.59% probability · 46th percentile
CISA KEV: Not listed
Weakness: CWE-754
Affected: electronjs/electron
Source: security-advisories@github.com

References

https://github.com/electron/electron/security/advisories/GHSA-p7v2-p9m8-qqg7Mitigation, Vendor Advisory
https://www.electronjs.org/docs/latest/api/context-bridge#parameter--error--return-type-supportProduct
https://github.com/electron/electron/security/advisories/GHSA-p7v2-p9m8-qqg7Mitigation, Vendor Advisory
https://www.electronjs.org/docs/latest/api/context-bridge#parameter--error--return-type-supportProduct

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.