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Posted May 8, 2007
Authored by Jesper Jurcenoks | Site netvigilance.com

Advanced Guestbook version 2.4.2 is prone to cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
advisories | CVE-2007-0605
SHA-256 | 6bdfc9777ed4da0bafb99d979cdc57b15facfac3c3b35ec85cbd98622842895d


Change Mirror Download
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.

External References:
Mitre CVE: CVE-2007-0605
NVD NIST: CVE-2007-0605
OSVDB: 33877

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.
Advisory URL:

Release Date:

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
SecureScout 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
Set PHP register_globals to Off.
XSS Attack Vulnerability 1:

Will execute <script>alert(document.cookie)</script>
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

Jesper Jurcenoks
Co-founder netVigilance, Inc

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