Ask about HTTP Parser with Directory Traversal String

[Seong Gyu Choi via Snort-sigs <snort-sigs () lists snort org>]

Hi, Snort Team

I have a question about the abbreviation of HTTP parser direction traversal
string( "../" or "\..") .

URI : /cgi-bin/../../etc/passwd

After Pass HTTP Parser : /etc/passwd

When URI pass http parser, all the characters in front of Directory
Traversal string(/../) fly away, so I wonder why you do this. Isn't it
normal to stay like the below?

What i thought After Pass HTTP Parser : /cgi-bin/etc/passwd

If there's a reason why your team designed it like this, please let me know.

Regards,
CHOI

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