CVE-2022-42989 - Cross-Site Scripting Vulnerability in ERP Sankhya before v4.11b81

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Summary

A new security vulnerability has been discovered and disclosed in ERP Sankhya software. The vulnerability, identified as CVE-2022-42989, allows for a cross-site scripting (XSS) attack to be performed via the Caixa de Entrada component. This vulnerability affects all versions of Sankhya before v4.11b81.

In this detailed post, we delve into the cause of this vulnerability, how an attacker can exploit it, and some mitigation tips that users of ERP Sankhya should consider. We will also provide code snippets and links to original references to help you assess your own systems and understand the extent of this vulnerability.

Vulnerability Details

ERP Sankhya is a widely used management software that provides various features and functionalities for businesses to manage their operations and information. Due to the exposure of this vulnerability, it opens the door to an attacker with malicious intent, potentially leading to unauthorized access, manipulation of data, or disruption of application functions.

Cross-Site Scripting (XSS) is a client-side code injection attack wherein an attacker can execute malicious scripts to manipulate the webpages viewed by other users. In this particular vulnerability, the attacker can exploit the Caixa de Entrada component, resulting in potential unauthorized access to sensitive data and security breaches.

The vulnerability was discovered by a security researcher and has been assigned the identifier CVE-2022-42989. It affects all versions of ERP Sankhya prior to v4.11b81.

Exploit Details

The heart of this vulnerability lies within the Caixa de Entrada component, where an attacker can inject malicious JavaScript code to be executed on the web application. A typical exploit attempt could look like this:

// Sample exploit code:
const maliciousScript = "<script>alert('XSS');</script>"; // This is just a simple example, the attacker could use more harmful scripts
document.getElementById("CaixaDeEntrada").innerHTML = maliciousScript;

When a user visits a webpage containing the malicious code, the exploit is triggered, and the attacker can perform a range of harmful actions such as:

To learn more about this vulnerability and the respective CVE entry, please follow these links

- National Vulnerability Database (NVD) - CVE-2022-42989
- Common Vulnerabilities and Exposures - CVE-2022-42989

Mitigation and Prevention

Users of ERP Sankhya are urged to immediately update to the latest version (v4.11b81) to protect against this vulnerability. You can download the latest version from Sankhya's official website: https://www.sankhya.com.br/

While this specific vulnerability is fixed in the said version, it's essential to note that XSS attacks are prevalent and can have similar impacts on other applications. Developers should consider implementing the following general recommendations to prevent XSS attacks:

- Sanitize user inputs: Ensure that any data entered by users is properly sanitized and validated to prevent the inclusion of malicious scripts.
- Use Content Security Policy (CSP): Implementing CSP can help prevent XSS attacks by specifying which sources of content are allowed to be executed.
- Escape outputs: Make sure that any content being displayed on the web application is properly escaped, meaning that any potentially dangerous characters are converted into safe representations.

The overall impact of CVE-2022-42989 highlights the need for ongoing security awareness, proper coding practices, and keeping your applications up-to-date to defend against potential attacks.

Timeline

Published on: 11/22/2022 14:15:00 UTC
Last modified on: 11/23/2022 18:51:00 UTC