Using iRules to mitigate Microsoft's MS15-034 / CVE-2015-1635 Range vulnerability

As more information becomes available regarding the recently published Range vulnerability affecting Microsoft platforms (see MS15-034and CVE-2015-1635), you can start mitigating this issue for your ...
Published Apr 15, 2015
Version 1.0
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Apr 16, 2015
The above would only detect if the range header is an exact match regarding upper and lower case. Should it not be first switching it all to lower ?