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???????Web?????????????????????????????????????????????????????????????????????

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?????????????????????????????????Web????????????????????????????????????????????????????????URL???

http://example.com/file.php?title=hello.txt

???????title?????????????????????????????title??????????????????????

http://example.com/file.php?title=../../etc/passwd

???????../../etc/passwd?????????????????/etc/passwd?????????????

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???????????????????????????URL????????????????URL?

http://example.com/file.php?title=../

???????????????????????????????????????../../..??????????????????

????????????????????????????????????????????????

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http://192.168.34.193/pikachu//vul/dir/dir_list.php?title=jarheads.php

2. ??2??????????truman.php??????URL???

http://192.168.34.193/pikachu//vul/dir/dir_list.php?title=truman.php

???????URL???????title??????????????????????????????????????title?????

http://192.168.34.193/pikachu//vul/dir/dir_list.php?title=../../

????????????????????????????????URL?

http://192.168.34.193/pikachu//vul/dir/../

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3. ???????????????????????????????????
4. ??PHP?open_basedir?????PHP??????????????????
5. ??Web??????mod_rewrite????????????????????????
6. ?????????????????????????????????????????

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?Web????????????????????????????????????????????????????????????????????????????

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