Bing.com WebmasterAuthenticationInformationPage.aspx XSS

Thursday, August 13, 2009
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Bing.com WebmasterAuthenticationInformationPage.aspx XSS
vendor url:http://ww.bing.com
advisore:http://lostmon.blogspot.com/2009/08/
bingcom-webmasterauthenticationinformat.html
vendor notify: yes vendor confirmed:yes
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Bing search engine contains a flaw that allows a remote cross site
scripting attack.This flaw exists because the application does not
validate properly 'authTag' variable upon submission to the
'WebmasterAuthenticationInformationPage.aspx' script.This could
allow a user to create a specially crafted URL that would execute
arbitrary code in a user's browser within the trust relationship
between the browser and the server,leading to a loss of integrity.


them a attacker can compose a malformed link in the variable
from WebmasterAuthenticationInformationPage.aspx and Look the
result code , it is write in two boxes and in the file
'LiveSearchSiteAuth.xml'

A remote user can compose a malformed link in the variable
from WebmasterXMLAuthDownloadPage.aspx ,wen download file
LiveSearchSiteAuth.xml this file have the malicious code.

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solution:
##########

Vendor patch

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timeline:
#############

discovered: 18-jun-2009
vendor notified: 07-08-2009
vendor response: 07-08-2009
vendor patch response: 13-08-2009
disclosure: 13-08-2009


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Thnx to Microsoft Security Response Center (MSRC)
http://blogs.technet.com/msrc/
thnx to estrella to be my ligth
thnx to all who day after day support me !!!
--
atentamente:
Lostmon (lostmon@gmail.com)
Web-Blog: http://lostmon.blogspot.com/
Google group: http://groups.google.com/group/lostmon (new)
--
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