Compliance Impact

The vulnerability in JeecgBoot allows a low-privilege user to escalate privileges by manipulating the userIdentity field, granting unauthorized access to department member data that should be restricted.

Such improper access control and privilege escalation can lead to unauthorized disclosure of personal or sensitive information, which may violate data protection regulations like GDPR or HIPAA that require strict access controls and protection of personal data.

Therefore, this vulnerability could negatively impact compliance with these standards by enabling unauthorized users to access data beyond their permitted scope.

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Executive Summary

This vulnerability exists in JeecgBoot up to version 3.9.1, specifically in the function user.getUsername within the file /sys/user/login/setting/userEdit of the SysUser component. It arises from improper access controls due to manipulation of the argument userIdentity. An attacker can exploit this remotely to bypass intended access restrictions.

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Impact Analysis

The vulnerability can allow an attacker to bypass access controls by manipulating the userIdentity argument, potentially gaining unauthorized access to user information or functionality. This could lead to information disclosure or unauthorized actions within the affected system.

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Mitigation Strategies

The recommended immediate step to mitigate this vulnerability is to upgrade the affected component JeecgBoot to version 3.9.2 or later.

This upgrade addresses the improper access control issue in the user.getUsername function of the SysUser component.

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Detection Guidance

This vulnerability can be detected by monitoring and analyzing POST requests to the endpoint /sys/user/login/setting/userEdit, specifically looking for manipulation of the userIdentity field in the JSON payload.

An attacker exploits this vulnerability by sending a crafted POST request with userIdentity set to 2 and the departIds of their department to escalate privileges.

To detect potential exploitation attempts, you can capture and inspect HTTP POST requests to the mentioned endpoint for suspicious userIdentity values or unexpected changes.

• Use network traffic monitoring tools like Wireshark or tcpdump to capture HTTP POST requests to /sys/user/login/setting/userEdit.
• Use command-line tools such as curl or httpie to manually test the endpoint by sending crafted POST requests and observing the response.
• Example curl command to test for the vulnerability (replace URL and authentication as needed):

curl -X POST https://your-jeecgboot-instance/sys/user/login/setting/userEdit -H "Content-Type: application/json" -d '{"userIdentity":2, "departIds":["your_department_id"]}' -b "your_auth_cookies"

If the request succeeds and the userIdentity is updated without proper authorization, it indicates the presence of the vulnerability.

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