netVigilance Security Advisory #12
Advanced Guestbook version 2.4.2 Multiple XSS Attack Vulnerabilities
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. The admin script lets you modify, view, and delete messages. Requires PHP4 and MySQL.
Mitre CVE: CVE-2007-0605
NVD NIST: CVE-2007-0605
Advanced Guestbook is a PHP-based guestbook with admin interface.
Security problems in the product allows attackers to conduct XSS attacks
This vulnerabilities can be exploited only when PHP register_globals is On.
Access Vector: Remote
Access Complexity: High
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
SecureScout Testcase ID:
Advanced Guestbook 2.4.2
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.
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
Set PHP register_globals to Off.
XSS Attack Vulnerability 1:
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"
The Server will execute the script
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