CVE-2023-29198 is a medium-severity vulnerability affecting Electron, a framework that enables cross-platform desktop applications using JavaScript, HTML, and CSS. This vulnerability allows code running in the main world context to access the isolated context, thereby performing privileged actions. The issue stems from a context isolation bypass where APIs exposed via the context bridge can return unserializable JavaScript objects, such as canvas rendering contexts, leading to potential unauthorized access.
The CVSS score for this vulnerability is 6, indicating medium severity. Various versions of Electron are affected, particularly those using `contextIsolation` and `contextBridge`. The urgency for organizations is moderate; they should address this issue in their patch cycle as it poses a real-world risk.
The vulnerability was published on September 6, 2023, and has been modified since. Organizations using affected versions of Electron should prioritize the implementation of patches to mitigate the associated risks.
Furthermore, the vulnerability is not currently actively exploited, and there are no known exploits available. Organizations can take comfort in this while still taking necessary precautions to update their applications.
Overall, organizations should stay vigilant and monitor for any updates regarding CVE-2023-29198 and ensure they are using the most recent versions of Electron to guard against possible exploitation.
Vulnerability Details
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`.
Technical Analysis
The root cause of CVE-2023-29198 arises from the improper isolation of contexts within the Electron framework when using `contextIsolation` and `contextBridge`. The attack vector is network-based, requiring an adversary to interact with the application through exposed APIs. The attack complexity is assessed as high due to the specific conditions that need to be met for exploitation, such as the return of unserializable objects.
Privileges required for exploitation are low, meaning that an attacker may not need extensive permissions to execute an attack. User interaction is not required, enabling potential attacks to occur without end-user knowledge.
The confidentiality, integrity, and availability impacts are classified as low. However, the scope is changed, indicating that the potential for damage extends beyond the vulnerable component.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to sensitive data and potential manipulation of application behaviors. The blast radius includes any Electron application that employs the affected versions of the framework.
The urgency assessment based on the CVSS score indicates that organizations should address this vulnerability in their priority patch cycle. Given the nature of the context isolation bypass, an attacker could potentially execute malicious scripts that could compromise user data.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions of Electron include all versions prior to `22.3.6`, as well as versions from `23.0.0` to `23.2.3`, and all `24.0.0` alpha and beta versions. Specifically, the vulnerable versions identified include `24.0.0-alpha1` through `24.0.0-alpha7`, `24.0.0-beta1` through `24.0.0-beta6`, and `25.0.0-alpha1`.
Mitigation & Remediation
Organizations should prioritize patching immediately. Fixed versions are available as `25.0.0-alpha.2`, `24.0.1`, `23.2.3`, and `22.3.6`. For those unable to upgrade immediately, it is essential to ensure that all values returned from functions exposed through the context bridge are supported and do not return unserializable objects.
Penetration testing can also help identify similar vulnerabilities in applications built on Electron.
Detection Guidance
Organizations should monitor logs for any unusual API responses that could indicate attempts to exploit this vulnerability. Behavioral anomalies in Electron applications should also be tracked, particularly those involving unexpected access to isolated contexts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-29198 lies in the potential for similar context isolation bypasses across other frameworks. Organizations should adopt a proactive stance on application isolation to mitigate similar risks effectively.
Security teams are advised to engage in continuous security assessments, including penetration testing methodology, to identify and rectify future vulnerabilities.
Additionally, the adoption of a robust vulnerability management program will help in tracking and responding to such vulnerabilities in the future.
Overall, organizations should ensure they are prepared to handle vulnerabilities like CVE-2023-29198 by implementing effective security measures and maintaining awareness of emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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