Reporter Jesper Jurcenoks
`netVigilance Security Advisory #10
dt_guestbook version 1.0f XSS vulnerability
dt_guestbook is a fully-featured message board system with admin interface. Due to program flaws it is possible for the remote attacker to conduct XSS attacks.
The remote attacker can convince the victim to open a specially crafted link that is a trusted guestbook server and execute arbitrary code in the users browser session.
Mitre CVE: CVE-2006-6487 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6487
NVD NIST: CVE-2006-6487 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6487
OSVDB: 30787 http://www.osvdb.com/displayvuln.php?osvdb_id=30787
dt_guestbook a fully-featured message board system with admin interface.
A security problem in the product allows attackers to conduct XSS attacks.
This vulnerability 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: cross-site scripting.
SecureScout Testcase ID:
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: Author Alexander Fedorov was notified on Dec 8 2006 and agreed to correct the XSS in his product. He has failed to respond to emails or Chat since Dec 8 2006.
Solution: Patch Possibly Pending from Vendor, please check http://fedorov.vitalain.ru for updates.
Set PHP register_globals to Off.
HTTP REQUEST http://[TARGET]/[dt_guestbook_v1-directory]/index.php?submit=1&error=%3Cscript%3Ealert(document.cookie)%3C/script%3E
will execute <script>alert(document.cookie)</script>
Advisory URL: http://www.netvigilance.com/advisory0009
Co-founder netVigilance, Inc