full-disclosure - Re: PayPal.com XSS Vulnerability

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Message-ID: <CAEW7ACktYXbw9OvE=P4L9Aud67yH4Xr1kftregDUF4Gw4in_Tw@mail.gmail.com>
Date: Tue, 28 May 2013 05:26:44 -0700
From: Dan Kaminsky <dan@...para.com>
To: Robert Kugler <robert.kugler10@...il.com>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: PayPal.com XSS Vulnerability

Heya Robert,

   So there's this pile of law around the world around work and kids; it's
a rather recent development that <18 year olds can find problems that
multibillion dollar interests are willing to pay bounties for.   The laws
are all trying to protect you from being made to pick berries or sew
t-shirts instead of going to class and playing outside.

   Law may be code, but it compiles VERY slowly.

   In general, you can talk to people and things'll work out.  Lawyerspeak
may look daunting, but seriously, send some friendly emails, there's real
people on the other side of those security@ addresses and they can usually
figure out some way around pesky things like birthdays.

--Dan

On Fri, May 24, 2013 at 9:38 AM, Robert Kugler <robert.kugler10@...il.com>wrote:

> Hello all!
>
> I'm Robert Kugler a 17 years old German student who's interested in
> securing computer systems.
>
> I would like to warn you that PayPal.com is vulnerable to a Cross-Site
> Scripting vulnerability!
> PayPal Inc. is running a bug bounty program for professional security
> researchers.
>
> https://www.paypal.com/us/webapps/mpp/security/reporting-security-issues
>
> XSS vulnerabilities are in scope. So I tried to take part and sent my find
> to PayPal Site Security.
>
> The vulnerability is located in the search function and can be triggered
> with the following javascript code:
>
>
> ';alert(String.fromCharCode(88,83,83))//';alert(String.fromCharCode(88,83,83))//";
>
> alert(String.fromCharCode(88,83,83))//";alert(String.fromCharCode(88,83,83))//--
> ></SCRIPT>">'><SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>
>
> https://www.paypal.com/de/cgi-bin/searchscr?cmd=_sitewide-search
>
> Screenshot: http://picturepush.com/public/13144090
>
> Unfortunately PayPal disqualified me from receiving any bounty payment
> because of being 17 years old...
>
> PayPal Site Security:
>
> "To be eligible for the Bug Bounty Program, you *must not*:
> ... Be less than 18 years of age.If PayPal discovers that a researcher
> does not meet any of the criteria above, PayPal will remove that researcher
> from the Bug Bounty Program and disqualify them from receiving any bounty
> payments."
>
> I don’t want to allege PayPal a kind of bug bounty cost saving, but it’s
> not the best idea when you're interested in motivated security
> researchers...
>
> Best regards,
>
> Robert Kugler
>
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