net Vigilance Security Advisory #12 Advanced Guestbook version 2.4.2 Multiple XSS Attack Vulnerabilities Description: Advanced Guestbook is a PHP-based guestbook script.
It includes many useful features such as preview, templates, e-mail notification, picture upload, page spanning , html tags handling, smiles, advanced guestbook codes and language support.
Advisory URL: Release Date: 05/07/2007 Severity: Risk: Medium CVSS Metrics Access Vector: Remote Access Complexity: High Authentication: not-required Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial Impact Bias: Normal CVSS Base Score: 5.6 Target Distribution on Internet: Low Exploitability: Functional Exploit Remediation Level: Workaround Report Confidence: Uncorroborated Vulnerability Impact: Attack Host Impact: XSS Attack Secure Scout Testcase ID: Vulnerable Systems: Advanced Guestbook 2.4.2 Vulnerability Type: XSS (Cross-Site Scripting) to force a web-site to display malicious contents to the target, by sending a specially crafted request to the web-site.
The vulnerable web-site is not the target of attack but is used as a tool for the hacker in the attack of the victim.
Vendor Status: Contact with the Vendor was established but draft of the security advisory wasn't provided because the Vendor stopped responding to our emails on 9 March 2007.
There is no official fix at the release of this Security Advisory Workaround: Set PHP register_globals to Off. size=1&size=1&img=1&picture=%22%3E%3Cscript% 3Ealert(%22ok%22)%3C/script%3E%3Cimg%20src=%2 2 REPLY: Will execute XSS Attack Vulnerability 2: The remote attacker can avoid the .htaccess file protection and run any script or view the contents of the templates.
Set in the COOKIES variable lang = "../[name of the script without php extension]" for example "../lib/admin.class" REQUEST: The Server will execute the script Credits: Jesper Jurcenoks Co-founder net Vigilance, Inc Full-Disclosure - We believe in it.
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