Executive Summary

CVE-2018-25168 is a Cross-Site Request Forgery (CSRF) vulnerability in Precurio Intranet Portal version 2.0. It allows unauthenticated attackers to create administrative user accounts by sending specially crafted POST requests to the /public/admin/user/submitnew endpoint. This endpoint processes user creation parameters without requiring CSRF tokens or any user interaction, enabling attackers to add new admin accounts without authorization.

The vulnerability exploits the lack of CSRF protections in the user creation functionality, allowing privilege escalation by bypassing authentication controls.

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Impact Analysis

[{'type': 'paragraph', 'content': 'This vulnerability can have serious security impacts by allowing attackers to create new administrative user accounts without authorization. This unauthorized privilege escalation compromises the integrity and security of the affected system.'}, {'type': 'list_item', 'content': 'Attackers can gain administrative access to the portal.'}, {'type': 'list_item', 'content': 'They can potentially control or manipulate sensitive data and system settings.'}, {'type': 'list_item', 'content': "The system's security posture is weakened due to the bypass of authentication and CSRF protections."}] [1, 2]

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by monitoring for unauthorized POST requests to the endpoint /public/admin/user/submitnew that include user creation parameters such as user_id, first_name, last_name, email, password, department_id, and location_id.'}, {'type': 'paragraph', 'content': 'One way to detect exploitation attempts is to analyze web server logs for suspicious POST requests to this endpoint that result in a 302 redirect to the user edit page, which indicates successful creation of a new user.'}, {'type': 'paragraph', 'content': 'Network intrusion detection systems (NIDS) or web application firewalls (WAF) can be configured to alert on POST requests to /public/admin/user/submitnew without valid CSRF tokens.'}, {'type': 'paragraph', 'content': 'Example commands to detect such activity could include using grep on web server logs to find POST requests to the vulnerable endpoint:'}, {'type': 'list_item', 'content': "grep 'POST /public/admin/user/submitnew' /var/log/apache2/access.log"}, {'type': 'list_item', 'content': "grep 'POST /public/admin/user/submitnew' /var/log/nginx/access.log"}, {'type': 'paragraph', 'content': 'Additionally, inspecting the POST request payloads for user creation parameters can help confirm attempts to exploit the vulnerability.'}] [2]

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Mitigation Strategies

Immediate mitigation steps include implementing CSRF protection mechanisms on the /public/admin/user/submitnew endpoint to require valid CSRF tokens for user creation requests.

Restrict access to the vulnerable endpoint to authenticated and authorized users only, ensuring that unauthenticated attackers cannot submit user creation requests.

Monitor and block suspicious POST requests targeting the endpoint, especially those that attempt to create new administrative users.

If possible, apply any available patches or updates from the software vendor that address this vulnerability.

As a temporary workaround, consider disabling the user creation functionality or restricting it via firewall rules until a proper fix is applied.

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