Ian P. Christian's Personal Blog Random witterings from pookey

13Oct/060

Odd XSS quirk in google videos

I don't think this is exploitable, but here's the details that I reported to google...

Bug with your XSS filters.

when viewing a view, you have a bar down the right hand side of the screen.
There is a bug in what I presume is your cross site scripting filter.

When it encouters a ' (single quote) within a string, it generates undesired results.

For example:
<a href="/videoplay?docid=2421984664875201064" onclick='setSessionCookie(VP_playlistCookieName, "...,", VP_cookieDomain); setSessionCookie(VP_playlistIndexCookieName, -1, VP_cookieDomain);' title="Steve Irwin How I" d="" like="" to="" be="" remembered="">Steve Irwin How I'd Like to...</a>

Notice how the 'title' attribute of the <a> tag has been formatted, causing the title string to be formatted as additional attributes to the <a> tag

Last time a friend found a bug and reported it, it took a shockingly long time for google to fix it ...

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