Gmail exploit may allow attackers to forward e-mail


	Gmail exploit may allow attackers to forward e-mail

Fast T friend

11-24-2008 6:16 AM

323 views

tags:

gmail, security, filters

Fast T friend says:

Check your filters to make sure no un-authorized ones have been added.

1 Comment |

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11-26-2008 5:35 PM

birdie-brain

oh damn. =(

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A Gmail security vulnerability may allow an attacker to set up filters on users' e-mail accounts without their knowledge, according to a <A href="http://geekcondition.com/2008/11/23/gmail-security-flaw-proof-of-concept/">proof of concept</A> posted Sunday at GeekCondition.com.
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In his post, Brandon writes that the vulnerability has caused some people to lose their domain names registered through GoDaddy.com.
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When you create a filter in your Gmail account, a request is sent to Google's servers to be processed. The request is made in the form of a url with many variables. For security reasons, your browser doesn't display all the variable contained within the url. Using FireFox and a plugin called Live HTTP Headers, you can see exactly what variables are sent from your browser to Google's servers.
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After that, an attacker just needs to identify the variable that is the equivalent of the username.
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"Obtaining this variable is tricky but possible," he writes. "I'm not going to tell you how to do it, if you search hard enough online you'll find out how."
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