CVE-2012-2941 in Yandex.Server 2010
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in search/ in Yandex.Server 2010 9.0 Enterprise allows remote attackers to inject arbitrary web script or HTML via the text parameter.
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Analysis
by VulDB Data Team • 06/25/2025
The vulnerability identified as CVE-2012-2941 represents a critical cross-site scripting flaw within Yandex.Server 2010 9.0 Enterprise software, specifically affecting the search functionality component. This issue resides in the search/ directory of the web server implementation and demonstrates a classic input validation weakness that enables malicious actors to execute unauthorized code within the context of affected user sessions. The vulnerability specifically targets the text parameter handling mechanism, which fails to properly sanitize user-supplied input before processing and rendering search results. This flaw falls under the CWE-79 category of Cross-Site Scripting, representing one of the most prevalent and dangerous web application security vulnerabilities that has been documented since the early days of web development.
The technical exploitation of this vulnerability occurs when remote attackers submit malicious payloads through the text parameter of the search functionality. When the server processes these inputs without adequate sanitization or encoding, the injected scripts become part of the dynamic web page content that gets rendered to unsuspecting users. The attack vector operates entirely through HTTP requests and requires no special privileges or authentication to exploit. The malicious code can be crafted to perform various harmful actions including session hijacking, credential theft, redirection to malicious sites, or data exfiltration from the victim's browser. This vulnerability essentially allows attackers to leverage the legitimate trust relationship between the web application and its users to execute unauthorized operations within the user's browser context.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it can enable sophisticated attack chains that compromise entire user sessions and potentially lead to broader system compromise. When users interact with search results containing malicious scripts, their browsers execute the injected code, which can steal cookies, modify page content, redirect users to phishing sites, or even install malware on the victim's system. The attack can be particularly insidious because it leverages legitimate search functionality, making it difficult for users to distinguish between benign search results and malicious payloads. Security professionals should note that this vulnerability aligns with ATT&CK technique T1566.001 for the initial access phase of an attack, where adversaries use web applications to deliver malicious code to target systems.
Organizations utilizing Yandex.Server 2010 9.0 Enterprise should prioritize immediate remediation through proper input validation and output encoding mechanisms. The recommended mitigation involves implementing comprehensive sanitization of all user inputs, particularly those used in dynamic content generation, and ensuring proper HTML encoding of output data to prevent script execution. Security measures should include the implementation of Content Security Policy headers, input validation frameworks, and regular security testing of web applications. Additionally, the vulnerability demonstrates the importance of following secure coding practices as outlined in OWASP Top Ten and other industry standards, particularly focusing on proper input handling and output encoding to prevent XSS attacks. Organizations should also consider implementing web application firewalls and monitoring for suspicious search query patterns that may indicate exploitation attempts.