CVE-2021-33733 : Security Advisory and Response

A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP2 Update 1) from Siemens. An attacker with privileged access could execute arbitrary commands in the local database through crafted requests to the webserver.

Understanding CVE-2021-33733

This section will cover details about the vulnerability in SINEC NMS.

What is CVE-2021-33733?

CVE-2021-33733 is a vulnerability in Siemens' SINEC NMS, allowing a privileged attacker to execute unauthorized commands in the database.

The Impact of CVE-2021-33733

The vulnerability could lead to unauthorized access and manipulation of data stored in the local database, posing a significant risk to the confidentiality and integrity of the system.

Technical Details of CVE-2021-33733

In this section, we will delve into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises from improper neutralization of special elements in SQL commands, enabling SQL injection attacks.

Affected Systems and Versions

SINEC NMS versions prior to V1.0 SP2 Update 1 are affected by this vulnerability.

Exploitation Mechanism

An authenticated attacker can exploit the flaw by sending carefully crafted requests to the webserver of the affected SINEC NMS application.

Mitigation and Prevention

Here, we discuss the necessary steps to mitigate the risks associated with CVE-2021-33733.

Immediate Steps to Take

Users are advised to update SINEC NMS to version V1.0 SP2 Update 1 or later to eliminate the vulnerability. Additionally, restricting access to the webserver can help mitigate the risk.

Long-Term Security Practices

Implementing proper input validation mechanisms, conducting regular security assessments, and educating users on secure coding practices can enhance the overall security posture.

Patching and Updates

Regularly applying security patches and updates provided by Siemens is essential to address known vulnerabilities and enhance the security of the SINEC NMS solution.