CVE-2007-3486 in search engine
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in AltaVista search engine allows remote attackers to inject arbitrary web script or HTML via the text parameter to the default URI.
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Analysis
by VulDB Data Team • 10/25/2017
The vulnerability described in CVE-2007-3486 represents a classic cross-site scripting flaw within the AltaVista search engine implementation. This weakness specifically manifests when the application fails to properly sanitize user input submitted through the text parameter of the default URI. The flaw enables malicious actors to inject arbitrary web scripts or HTML content that gets executed in the context of other users' browsers who access the affected search results or pages. The vulnerability operates at the application layer where user-supplied data is directly incorporated into web responses without adequate validation or encoding mechanisms. This type of flaw falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security vulnerabilities identified by the CWE project. The attack vector leverages the trust relationship between the web application and its users, allowing attackers to exploit the application's failure to properly handle untrusted input data. When a victim accesses a page containing malicious script injected through the vulnerable text parameter, the script executes in their browser with the privileges of the victim's session, potentially leading to session hijacking, credential theft, or other malicious activities.
The operational impact of this vulnerability extends beyond simple script injection as it creates a persistent threat vector that can be exploited across multiple user sessions. Attackers can craft malicious payloads that appear legitimate within the search engine interface, making detection more challenging for end users and security monitoring systems. The vulnerability affects the core functionality of the search engine by compromising the integrity of search results and user interactions. When exploited successfully, this XSS vulnerability can facilitate more sophisticated attacks such as cookie theft, session fixation, or redirection to malicious sites. The attack typically requires no special privileges or complex exploitation techniques, making it particularly dangerous as it can be executed by any remote attacker with basic web knowledge. The vulnerability's persistence means that once injected, malicious scripts can continue to affect users until the content is removed from the application's response or the user's session ends. Security researchers have documented similar vulnerabilities in various web applications where input validation failures create opportunities for attackers to manipulate application behavior and user experiences.
Mitigation strategies for CVE-2007-3486 should focus on implementing robust input validation and output encoding mechanisms. The primary defense involves sanitizing all user-provided input through proper encoding before incorporating it into web responses, particularly when rendering content in HTML contexts. This approach aligns with the OWASP Top Ten security practices and addresses the fundamental root cause of the vulnerability. Organizations should implement Content Security Policy headers to limit script execution and prevent unauthorized code injection. Additionally, the application should employ proper escape sequences when displaying user input to ensure that any potentially malicious scripts are rendered harmless. Regular security testing including dynamic application security testing and manual code reviews should be conducted to identify similar vulnerabilities in other application components. The implementation of web application firewalls can provide additional protection layers, though this should not replace proper input validation. Security teams should also establish monitoring procedures to detect unusual patterns in search queries or user interactions that might indicate exploitation attempts. The vulnerability demonstrates the critical importance of defense-in-depth strategies where multiple security controls work together to protect against various attack vectors. Organizations should maintain up-to-date security patches and conduct regular security awareness training for developers to prevent similar issues in future application development cycles. The remediation process should include comprehensive testing to ensure that input validation mechanisms do not inadvertently break legitimate application functionality while effectively preventing XSS exploitation attempts.