CVE-2006-0780 in PerlBlog
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in weblog.pl in PerlBlog 1.09b and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) name and (2) email parameters.
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Analysis
by VulDB Data Team • 06/20/2024
The vulnerability identified as CVE-2006-0780 represents a critical security flaw in PerlBlog version 1.09b and earlier, specifically targeting the weblog.pl script which serves as the core component for handling user interactions and data submission. This issue manifests as multiple cross-site scripting vulnerabilities that arise from insufficient input validation and sanitization within the application's parameter handling mechanisms. The vulnerability affects two primary user input fields namely the name parameter and email parameter, both of which are processed without adequate security measures to prevent malicious script injection attempts. These parameters are typically used in forms where users submit their personal information to be displayed within the weblog interface, making them prime targets for exploitation by malicious actors seeking to compromise user sessions or execute unauthorized code.
The technical nature of this vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, where improper validation of user-supplied data allows attackers to inject malicious scripts that execute in the context of other users' browsers. The flaw occurs because the weblog.pl script fails to properly sanitize or escape special characters in the name and email parameters before rendering them in web pages, creating an environment where attackers can embed malicious javascript code or html content. When users browse pages containing these vulnerable parameters, their browsers execute the injected scripts, potentially leading to session hijacking, data theft, or redirection to malicious sites. The vulnerability is particularly dangerous because it requires no special privileges or authentication to exploit, making it accessible to any remote attacker who can submit data through the weblog interface.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the capability to manipulate user experiences and potentially compromise entire user sessions. An attacker could inject scripts that steal cookies, redirect users to phishing sites, or modify content displayed to other visitors, effectively enabling a range of malicious activities including credential theft, session fixation, and data manipulation. The vulnerability affects all users who interact with the weblog application, particularly those who view pages containing the maliciously injected content, creating a widespread attack surface that could impact the entire user base. Additionally, the nature of XSS vulnerabilities means that successful exploitation could lead to persistent attacks where malicious code remains embedded in the application until manually removed, potentially causing ongoing security risks for months or years.
Mitigation strategies for CVE-2006-0780 must address both immediate remediation and long-term security improvements within the PerlBlog application. The primary fix involves implementing proper input validation and output encoding mechanisms that sanitize all user-supplied data before processing or displaying it within web pages. This approach aligns with ATT&CK technique T1059.007 which focuses on command and scripting interpreter usage, as proper sanitization prevents malicious code execution. Organizations should immediately upgrade to PerlBlog versions that have addressed this vulnerability, as the flaw has been resolved in subsequent releases through improved parameter handling and data validation. Additionally, implementing content security policies, using proper HTML escaping techniques, and establishing comprehensive input validation routines will help prevent similar vulnerabilities from occurring in other parts of the application. Regular security audits and penetration testing should be conducted to identify and address potential XSS vulnerabilities in other components, ensuring that the application maintains robust defenses against evolving web-based attack vectors.