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Cookie handling for hosts/domains with the underscore (_) character by Christopher Eberle



Type: Bug
ID: 804339
Opened: 10/2/2013 10:58:58 AM
Access Restriction: Public
User(s) can reproduce this bug


Navigating to a site where the URL contains an underscore in the host portion causes internet explorer to silently fail to store cookies for that site.
This appears to be a hold-over which only affects IE (Both Google Chrome and Mozilla Firefox handle cookies for URLs with underscores in the host portion) from 2001 bulletin MS01-055.

While the impact of this is relatively small, from a business standpoint (aside from the need to rename and possibly rebuild affected servers), this "feature" breaks convention with other microsoft technologies (IIS, AD and DNS don't complain, System control panel warns when setting a name with an underscore, but it works fine otherwise). Of all the fathomable technologies, it seems that only IE has a problem with this.
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Posted by Christopher Eberle on 10/2/2013 at 10:59 AM
Create a CNAME for the affected server and use that instead.
File Name Submitted By Submitted On File Size  
With_.zip 10/2/2013 47 KB