CVE-2006-1106 in Pixelpost
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Pixelpost 1.5 beta 1 and earlier allows remote attackers to inject arbitrary web script or HTML via the (1) message, (2) name, (3) url, and (4) email parameters when commenting on a post. NOTE: the vendor has disputed some issues from the original disclosure, but due to the vagueness of the dispute, it is not clear whether the vendor is disputing this particular issue.
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Analysis
by VulDB Data Team • 07/08/2021
The vulnerability described in CVE-2006-1106 represents a classic cross-site scripting flaw affecting Pixelpost version 1.5 beta 1 and earlier installations. This type of vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security issues. The vulnerability specifically impacts the commenting functionality of the Pixelpost blogging platform, where user input is not properly sanitized before being rendered back to other users. The affected parameters include message, name, url, and email fields, which are all part of the comment submission process. This creates a scenario where malicious actors can inject arbitrary web scripts or HTML code that will execute in the browsers of other users who view the compromised comments.
The technical exploitation of this vulnerability occurs through the improper handling of user-supplied input within the web application's comment processing mechanism. When users submit comments through the vulnerable Pixelpost installation, the application fails to implement adequate input validation and output encoding measures. This allows attackers to craft malicious payloads that contain JavaScript code or HTML tags within the affected parameter fields. The vulnerability is particularly concerning because it affects multiple input fields, increasing the attack surface and providing multiple vectors for exploitation. The fact that this vulnerability exists in a beta version suggests that proper security testing and input sanitization were not adequately implemented during the development phase.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to perform various malicious activities through the compromised platform. Attackers could potentially steal session cookies, redirect users to malicious websites, deface the blog content, or even execute more sophisticated attacks such as credential theft or privilege escalation within the context of the affected users' browsers. The distributed nature of the vulnerability means that any user who views the compromised comments becomes a potential victim of the attack. This makes the vulnerability particularly dangerous in environments where the blog serves as a community platform with many active users. The security implications also extend to potential data exfiltration and the ability to manipulate the user experience on the affected platform.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and output encoding measures. The most effective approach involves sanitizing all user input before processing or storing it within the application. This includes implementing strict validation rules that reject or escape potentially dangerous characters and sequences. Additionally, the application should employ proper output encoding when rendering user-supplied content back to browsers, ensuring that any HTML or JavaScript code is treated as plain text rather than executable content. The implementation of Content Security Policy headers can provide an additional layer of protection by restricting the sources from which scripts can be loaded. Organizations should also consider implementing web application firewalls to detect and block suspicious input patterns. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other components of the web application. The vulnerability's classification under CWE-79 emphasizes the need for comprehensive security practices throughout the application development lifecycle, as outlined in the OWASP Top Ten security framework.