Impact Analysis

An attacker who is authenticated to the Roxy-WI interface can exploit this vulnerability to read arbitrary files on the server. This can lead to exposure of sensitive information such as configuration files, credentials, or other data accessible to the web application process.

Such unauthorized file access can compromise the confidentiality of the system and potentially aid further attacks or unauthorized access.

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Mitigation Strategies

To mitigate this vulnerability, upgrade Roxy-WI to version 8.2.6.4 or later, which contains a patch that properly validates the configver parameter to prevent path traversal.

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Executive Summary

This vulnerability exists in Roxy-WI, a web interface used to manage servers like Haproxy, Nginx, Apache, and Keepalived. Before version 8.2.6.4, the POST /config/<service>/show API endpoint accepts a parameter called configver, which is used to build a file path. However, the application only checks the base directory path (which is safe) and does not validate the user-supplied configver parameter.

Because the configver parameter is not properly validated, an authenticated attacker can include directory traversal sequences such as '../' to escape the intended directory and access arbitrary files on the server that the web application process can read.

This issue was fixed in version 8.2.6.4 by patching the way the configver parameter is handled.

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Detection Guidance

This vulnerability involves the POST /config/<service>/show API endpoint in Roxy-WI prior to version 8.2.6.4, where the configver parameter is vulnerable to path traversal attacks allowing an authenticated attacker to read arbitrary files.

To detect this vulnerability on your system, you can attempt to send an authenticated POST request to the /config/<service>/show endpoint with a configver parameter containing path traversal sequences such as '../' and observe if the response includes contents of files outside the intended directory.

Example command using curl (replace <service>, <username>, and <password> accordingly):

• curl -X POST -u <username>:<password> -d "configver=../../../../etc/passwd" https://<roxy-wi-host>/config/<service>/show

If the response contains the contents of /etc/passwd or other sensitive files, the system is vulnerable.

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Compliance Impact

The vulnerability allows an authenticated attacker to perform a path traversal attack and read arbitrary files accessible to the web application process. This unauthorized access to potentially sensitive files could lead to exposure of personal or protected data.

Such unauthorized data access may impact compliance with standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive information from unauthorized disclosure.

However, the provided information does not explicitly describe the specific compliance implications or whether any regulated data is at risk.

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