CVE-2009-2565 in shiromuku(fs6)DIARY
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Perl CGI s By Mrs. Shiromuku shiromuku(fs6)DIARY 2.40 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 12/15/2017
The vulnerability identified as CVE-2009-2565 represents a critical cross-site scripting flaw within the Perl CGI script by Mrs. Shiromuku shiromuku(fs6)DIARY 2.40 web application. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is a pervasive security weakness that enables attackers to inject malicious client-side scripts into web applications. The vulnerability specifically affects the diary application that processes user input through CGI interfaces, creating an attack surface where unfiltered data can be executed in the context of other users' browsers.
The technical flaw manifests through unspecified vectors that allow remote attackers to inject arbitrary web script or HTML content into the application's output. This occurs when user-supplied data is not properly sanitized or escaped before being rendered in web pages, enabling attackers to craft malicious payloads that execute in the victim's browser context. The vulnerability is particularly concerning because it operates at the application layer, where user input flows directly into web output without adequate validation or encoding mechanisms. Attackers can leverage this weakness to steal session cookies, perform unauthorized actions on behalf of users, or redirect victims to malicious sites.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to manipulate the application's behavior and compromise user sessions. When exploited, the XSS vulnerability can enable session hijacking attacks where attackers capture authentication tokens and impersonate legitimate users. The attack can be executed through various means including crafted URLs, form submissions, or even through social engineering techniques that prompt users to interact with malicious content. The vulnerability affects users who view pages generated by the diary application, making it particularly dangerous in environments where multiple users interact with shared content.
Mitigation strategies for CVE-2009-2565 must address the fundamental lack of input validation and output encoding within the Perl CGI application. Organizations should implement proper HTML escaping routines for all user-supplied data before rendering it in web pages, following the principle of least privilege and input sanitization. The application should employ Content Security Policy headers to limit script execution and prevent unauthorized code injection. Additionally, developers should adopt secure coding practices that include validating input data against expected formats and implementing proper output encoding for different contexts such as HTML, JavaScript, and URL parameters. The vulnerability aligns with ATT&CK technique T1059.007 for JavaScript and VBScript execution, highlighting the need for comprehensive defensive measures. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in legacy applications, while also ensuring that the application follows modern security standards for web application development and deployment.