CVE-2011-4812 in BestShopPro
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in nowosci.php in BestShopPro allows remote attackers to inject arbitrary web script or HTML via the str parameter.
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Analysis
by VulDB Data Team • 12/06/2024
The CVE-2011-4812 vulnerability represents a classic cross-site scripting flaw in the BestShopPro e-commerce platform's nowosci.php script. This vulnerability specifically affects the handling of the str parameter, which is processed without proper input validation or output encoding mechanisms. The flaw exists in the web application's user interface where user-supplied data is directly incorporated into dynamic web content without adequate sanitization measures. The vulnerability classifies under CWE-79 which defines improper neutralization of input during web page generation, making it a prime example of how insufficient data validation can lead to arbitrary code execution within user browsers.
The technical exploitation of this vulnerability requires an attacker to craft malicious input containing script tags or other HTML elements that will be executed when the vulnerable page is rendered. When a user visits the nowosci.php page with a specially crafted str parameter, the injected content becomes part of the page's HTML output and executes in the victim's browser context. This allows attackers to perform session hijacking, defacement of web pages, or redirect users to malicious sites. The vulnerability operates at the application layer and can be categorized under the ATT&CK technique T1059.001 for command and scripting interpreter, specifically focusing on the execution of malicious scripts through web interfaces.
The operational impact of this vulnerability extends beyond simple data theft or defacement. Attackers can leverage this flaw to establish persistent access through browser-based attacks, potentially compromising user credentials, session tokens, or personal information stored in the browser. The vulnerability affects the confidentiality, integrity, and availability of the web application by enabling unauthorized code execution. Organizations running BestShopPro systems are particularly at risk as this vulnerability allows attackers to manipulate the user experience and potentially gain access to sensitive customer data. The attack surface is broad since any user interaction with the nowosci.php page could trigger the vulnerability.
Mitigation strategies for CVE-2011-4812 should focus on implementing robust input validation and output encoding practices throughout the application. The most effective immediate fix involves sanitizing all user input parameters, particularly the str parameter, by removing or encoding potentially dangerous characters such as angle brackets, quotes, and script tags. Organizations should implement proper HTML escaping mechanisms when rendering user-supplied content in web pages. Additionally, deploying web application firewalls and implementing content security policies can provide additional layers of protection. The vulnerability demonstrates the critical importance of following secure coding practices as outlined in OWASP Top 10 and the principle of least privilege in web application development. Regular security assessments and input validation testing should be integrated into the development lifecycle to prevent similar vulnerabilities from emerging in future releases.