Fresh Guest Book (guest.cgi) Input Validation Bug in 'Name' Field Permits Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1009578
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Mar 29 2004
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Impact: Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Exploit Included: Yes
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Description: ShelzZ of 0x29a team reported an input validation vulnerability in Fresh Guest Book. A remote user can conduct cross-site scripting attacks.
It is reported that the 'guest.cgi' script does not properly filter HTML code from the 'Name' field. A remote user can submit a
specially crafted name. Then, when a target user views the guestbook entry, arbitrary scripting code will be executed by the target
user's browser. The code will originate from the site running the Fresh Guest book software and will run in the security context
of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any,
associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site
acting as the target user.
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Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the
Fresh Guest Book software, access data recently submitted by the target user via web form to the site, or take actions on the site
acting as the target user.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.webfresh.com/perl/fgb/index.shtml (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any)
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Reported By: "ShelzZ" <shelzz@mail.ru>
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Message History:
None.
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Source Message Contents
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Date: Mon, 29 Mar 2004 01:12:39 +0400
From: "ShelzZ" <shelzz@mail.ru>
Subject: bug
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#############################
#0x29a team security advisory
#############################
#Product: Fresh Guest book
#Script: guest.cgi
#Company: WebFresh
#Vulnerability: XSS
#############################
#Overview:
HiGuest is a simple perl-guestbook, which include all standart
guestbook functions.
#Bug: Any remote user can execute html code on the vulnerable system.
The script don't filter incoming data in "Name" area.
#w0w
http://0x29a.hncrew.org
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