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GHSA-p7v2-p9m8-qqg7
No affected components available
Impact
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.
Workarounds
This issue is exploitable under either of two conditions:
- If an API exposed to the main world via
contextBridgecan return an object or array that contains a JS object which cannot be serialized, for instance, a canvas rendering context. This would normally result in an exception being thrownError: object could not be cloned. - If an API exposed to the main world via
contextBridgehas a return value that throws a user-generated exception while being sent over the bridge, for instance a dynamic getter property on an object that throws an error when being computed.
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 and that any objects returned from functions do not have dynamic getters that can throw exceptions.
Auditing your exposed API is likely to be quite difficult so we strongly recommend you update to a patched version of Electron.
Fixed Versions
25.0.0-alpha.224.0.123.2.322.3.6
For more information
If you have any questions or comments about this advisory, email us at security@electronjs.org
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data. There is a low impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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