Guestbox action.php HTTP POST authentication bypass

guestbox-admin-access (24797)

Low Risk

Description:

Guestbox could allow a remote attacker to gain administrative access to the application. A remote attacker could send a specially-crafted HTTP POST request to the action.php script to bypass authentication and post comments as the 'administrator'.

*CVSS:

Base Score:	3.5
Access Vector:	Remote
Access Complexity:	Low
Authentication:	Not Required
Confidentiality Impact:	None
Integrity Impact:	Partial
Availability Impact:	None
Temporal Score:	2.6
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Guestbox (0.8 or later), available from the Guestbox Web site. See References.

References:

• Bugtraq Mailing List, Mon Feb 20 2006 - 05:28:34 CST : Guestbox XSS/an admin bypass.
• Guestbox 0.7BETA Web site: Latest News. (This site is in another language.)
• CVE-2006-0859: Michael Salzer Guestbox 0.6, and other versions before 0.8, allows remote attackers to post an admin comment to a guestbook entry via a certain modified form, possibly related to the nummer parameter.
• OSVDB ID: 23374: Guestbox action.php Admin Authentication Bypass
• SA18946: Guestbox Two Vulnerabilities and One Security Issue
• VUPEN/ADV-2006-0675: Guestbox Cross Site Scripting and Information Disclosure Vulnerabilities

Platforms Affected:

• Michael Salzer Guestbox 0.6

Reported:

Feb 20, 2006

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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