CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
54.1%
A Content-Security-Policy that disables eval, specifically setting a script-src
directive and not providing unsafe-eval
in that directive, is not respected in renderers that have sandbox and contextIsolation disabled. i.e. sandbox: false
and contextIsolation: false
in the webPreferences
object.
This resulted in incorrectly allowing usage of methods like eval()
and new Function
, which can result in an expanded attack surface.
This issue only ever affected the 22 and 23 major versions of Electron and has been fixed in the latest versions of those release lines. Specifically, these versions contain the fixes:
We recommend all apps upgrade to the latest stable version of Electron, especially if they use sandbox: false
or contextIsolation: false
.
If upgrading isn’t possible, this issue can be addressed without upgrading by enabling at least one of sandbox: true
or contextIsolation: true
on all renderers.
const mainWindow = new BrowserWindow({
webPreferences: {
sandbox: true,
}
});
If you have any questions or comments about this advisory, email us at [email protected].
Thanks to user @andreasdj for reporting this issue.
github.com/advisories/GHSA-gxh7-wv9q-fwfr
github.com/electron/electron/commit/9e7fbc7021d8d716c43782249a552e55289c35db
github.com/electron/electron/pull/36667
github.com/electron/electron/pull/36668
github.com/electron/electron/releases/tag/v22.0.1
github.com/electron/electron/security/advisories/GHSA-gxh7-wv9q-fwfr
nvd.nist.gov/vuln/detail/CVE-2023-23623