Sensitive Data exposure # CVE-2024-33453
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# Sensitive Data Exposure via Object Level Access Control in esp-idf
## Description
A Buffer Overflow vulnerability in the `esp-idf` framework version 5.1, used by some Schoolbox products, allows a remote attacker to obtain sensitive information through improper object-level access control. This vulnerability is triggered by manipulating the `id` parameter linked to the `externalId` component, leading to unauthorized access to sensitive data.
## Additional Information
The esp-idf framework has a vulnerability in the `externalId` component that results in improper object-level access control. This issue allows authenticated users to exploit the system by changing the `id` parameter in the URL to access data belonging to other users.
### Vulnerable URL Example
An authenticated user can change the `id` parameter in the URL to access different users' information:
- Original URL: `https://example.com/search/user?id=9682`
- Modified URL: `https://example.com/search/user?id=9683`
This lack of proper access control could lead to sensitive information being exposed unintentionally.
## Vulnerability Details
- **Vulnerability Type:** Incorrect Access Control
- **Vendor of Product:** Espressif Systems (esp-idf)
- **Affected Product Code Base:** esp-idf - 5.1
- **Vulnerable Parameter:** `id`
- **Vulnerable Component:** `externalId`
- **Attack Type:** Remote
## Impact
This vulnerability allows authenticated users to access and potentially manipulate sensitive data belonging to other users by altering the `id` parameter, leading to significant information disclosure risks.
## Attack Vectors
To exploit this vulnerability, an attacker must be authenticated in the system that uses the esp-idf framework. By modifying the `id` parameter in the URL, the attacker can access data not intended for their account, thus exposing sensitive user information.
## Mitigation
To mitigate this vulnerability, it is crucial to implement robust object-level access controls within the esp-idf framework to restrict access based on user roles and permissions. Additionally, always validate and sanitize user inputs, ensuring URL parameters like `id` do not control access to sensitive information.
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**Disclaimer:** This proof of concept is intended for educational and research purposes only. Unauthorized exploitation of this vulnerability may be illegal and is punishable by law.
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This README outlines the vulnerability details and provides a clear path for understanding and potentially mitigating the issue.
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