CWE-34: Path Traversal: '....//'
ID
CWE-34
Abstraction
Variant
Structure
Simple
Status
Incomplete
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '....//' (doubled dot dot slash) sequences that can resolve to a location that is outside of that directory.
This allows attackers to traverse the file system to access files or directories that are outside of the restricted directory.
The '....//' manipulation is useful for bypassing some path traversal protection schemes. If "../" is filtered in a sequential fashion, as done by some regular expression engines, then "....//" can collapse into the "../" unsafe value (CWE-182). It could also be useful when ".." is removed, if the operating system treats "//" and "/" as equivalent.
Modes of Introduction
| Phase | Note |
|---|---|
| Implementation |
Applicable Platforms
| Type | Class | Name | Prevalence |
|---|---|---|---|
| Language | Not Language-Specific |
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