CVE-2008-4756 in PHP-Daily
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in add_prest_date.php in PHP-Daily allows remote attackers to inject arbitrary web script or HTML via the date parameter.
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Analysis
by VulDB Data Team • 11/09/2024
The vulnerability described in CVE-2008-4756 represents a classic cross-site scripting flaw within the PHP-Daily application's add_prest_date.php component. This type of vulnerability falls under the CWE-79 category, which specifically addresses cross-site scripting vulnerabilities where untrusted data is improperly incorporated into web page content without adequate sanitization or encoding. The vulnerability manifests when the application fails to properly validate or sanitize user input received through the date parameter, creating an opportunity for malicious actors to inject arbitrary HTML or JavaScript code into web pages viewed by other users.
The technical implementation of this flaw occurs at the input validation stage where the date parameter from user requests is directly processed and displayed within the web application's output without proper security measures. When an attacker crafts a malicious payload containing script tags or other HTML elements and submits it through the date parameter, the application stores or displays this content without adequate filtering or encoding. This allows the injected code to execute within the browser context of unsuspecting users who view the affected page, potentially leading to session hijacking, credential theft, or other malicious activities.
The operational impact of this vulnerability extends beyond simple data corruption or display issues, as it represents a serious security weakness that can be exploited by remote attackers without requiring authentication or privileged access. The vulnerability affects the integrity and confidentiality of user sessions, as malicious scripts can access cookies, local storage, or other sensitive information available to the browser. According to ATT&CK framework, this vulnerability maps to T1059.007 for scripting and T1531 for credential access, as attackers can leverage the XSS to steal session tokens or user credentials. The vulnerability also impacts the application's availability by potentially allowing attackers to redirect users to malicious sites or inject content that disrupts normal application functionality.
Mitigation strategies for CVE-2008-4756 should focus on implementing proper input validation and output encoding mechanisms. The most effective approach involves sanitizing all user-supplied input through proper encoding before rendering it in web pages, specifically implementing HTML entity encoding for the date parameter. Additionally, developers should implement Content Security Policy headers to limit script execution and prevent unauthorized code injection. The application should also employ proper parameter validation to ensure that date inputs conform to expected formats and reject any input containing potentially malicious characters or script tags. Security best practices recommend implementing a whitelist approach for acceptable input values and ensuring that all dynamic content is properly escaped according to the context in which it is rendered. This vulnerability highlights the critical importance of input validation and output encoding in preventing XSS attacks, which remain one of the most prevalent and dangerous web application security weaknesses identified in industry security assessments.