CVE-2006-4718 in KorviBlog
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in livre_or.php in KorviBlog 1.3.0 allow remote attackers to inject arbitrary web script or HTML via the (1) prenom, (2) emailFrom, or (3) body parameters.
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Analysis
by VulDB Data Team • 08/04/2018
The vulnerability identified as CVE-2006-4718 represents a critical cross-site scripting weakness in KorviBlog version 1.3.0, specifically within the livre_or.php component. This flaw enables remote attackers to execute malicious web scripts or HTML code in the context of affected users' browsers, potentially leading to severe security implications including session hijacking, data theft, and unauthorized actions performed on behalf of victims. The vulnerability affects three distinct input parameters: prenom, emailFrom, and body, all of which are processed without adequate sanitization or validation mechanisms.
The technical nature of this vulnerability aligns with CWE-79, which describes improper neutralization of input during web page generation, commonly known as cross-site scripting. This weakness occurs when user-supplied data is directly incorporated into web page output without proper encoding or validation, creating an environment where malicious scripts can be executed. The specific implementation flaw in KorviBlog's livre_or.php script fails to sanitize user inputs before rendering them in HTML output, allowing attackers to inject malicious payloads that persist in the application's dynamic content.
The operational impact of this vulnerability extends beyond simple script injection, as it can be leveraged for various malicious activities within the ATT&CK framework under the T1566 technique category for initial access through spearphishing with attachments or links. Attackers can craft malicious URLs or email content that, when viewed by unsuspecting users, will execute scripts in their browsers. This could result in session cookies being stolen, leading to privilege escalation, or the redirection of users to malicious sites for credential harvesting. The vulnerability particularly affects web applications that do not properly validate or encode user input before displaying it, creating a persistent threat vector.
Mitigation strategies for this vulnerability require immediate implementation of input validation and output encoding mechanisms. Developers should employ proper parameter validation to ensure that all user inputs conform to expected formats and reject any input containing potentially dangerous characters or script tags. The application should implement strict output encoding when displaying user-provided data, particularly in HTML contexts where script execution could occur. Additionally, the application should employ Content Security Policy (CSP) headers to prevent unauthorized script execution, and regular security audits should be conducted to identify and remediate similar vulnerabilities. The fix should also include implementing proper access controls and input sanitization routines to prevent the exploitation of similar weaknesses in other parts of the application.