CVE-2021-29661 Explained : Impact and Mitigation
Learn about CVE-2021-29661, a Stored XSS vulnerability in Softing AG OPC Toolbox. Understand the impact, affected systems, exploitation method, and mitigation steps.
Softing AG OPC Toolbox through version 4.10.1.13035 is vulnerable to a Stored Cross-Site Scripting (XSS) attack. An attacker can exploit this vulnerability via the ITEMLISTVALUES##ITEMID parameter, injecting malicious JavaScript into the trace file. This allows the injected payload to execute whenever an authenticated user accesses the affected page.
Understanding CVE-2021-29661
This section will provide a detailed insight into the CVE-2021-29661 vulnerability.
What is CVE-2021-29661?
CVE-2021-29661 is a Stored XSS vulnerability found in Softing AG OPC Toolbox versions up to 4.10.1.13035. It allows an attacker to insert harmful scripts into the trace file through a specific parameter, leading to potential code execution when the affected page is visited by an authenticated user.
The Impact of CVE-2021-29661
The impact of this vulnerability is significant as it enables attackers to perform unauthorized actions within the context of authenticated users, potentially compromising sensitive data and system integrity.
Technical Details of CVE-2021-29661
This section will delve into the technical aspects of the CVE-2021-29661 vulnerability.
Vulnerability Description
The vulnerability arises due to insufficient validation of user-supplied data, allowing malicious scripts to be stored and executed within the application context.
Affected Systems and Versions
Softing AG OPC Toolbox versions up to 4.10.1.13035 are confirmed to be affected by this security flaw.
Exploitation Mechanism
Attackers can exploit this vulnerability by including malicious JavaScript code in the ITEMLISTVALUES##ITEMID parameter, leading to the execution of unauthorized scripts by authenticated users.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-29661, immediate steps should be taken and long-term security practices implemented.
Immediate Steps to Take
Users are advised to update to a patched version, if available, and sanitize user inputs to prevent script injection.
Long-Term Security Practices
Incorporate secure coding practices, perform regular security assessments, and educate users about the risks of XSS attacks to enhance overall system security.
Patching and Updates
Stay informed about security advisories from the vendor and promptly apply patches or updates to address known vulnerabilities.