Authorization Bypass in SINEC NMS Allows Password Reset Abuse

Impact Analysis

An attacker who exploits this vulnerability can reset passwords of any user account without proper authorization.

This could lead to unauthorized access to sensitive systems and data managed by SINEC NMS.

Such unauthorized access can compromise confidentiality, integrity, and availability of network management operations.

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Executive Summary

This vulnerability exists in SINEC NMS versions prior to V4.0 SP3 where the system does not properly validate user authorization when processing password reset requests.

As a result, an authenticated remote attacker can bypass authorization checks and reset the password of any arbitrary user account.

This issue is classified as an Authorization Bypass vulnerability (CWE-639) and has a high severity score.

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Mitigation Strategies

To mitigate the vulnerability in SINEC NMS versions prior to V4.0 SP3, Siemens recommends updating all affected versions to V4.0 SP3 or later.

Additional mitigation steps include limiting network access to trusted users and systems only.

It is also advised to follow general security recommendations such as protecting network access with appropriate mechanisms and configuring the environment according to Siemens' operational guidelines for Industrial Security.

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Compliance Impact

The vulnerability allows an authenticated remote attacker to bypass authorization checks and reset the password of any arbitrary user account, which could lead to unauthorized access to sensitive information.

Such unauthorized access risks violating common standards and regulations like GDPR and HIPAA, which require strict controls on user authentication and access to personal or sensitive data.

Therefore, if exploited, this vulnerability could compromise compliance by undermining the confidentiality and integrity of user accounts and associated data.

Siemens recommends updating to a fixed version and applying network access restrictions and security best practices to mitigate these risks and help maintain compliance.

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