Path Traversal: '.../...//'
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '.../...//' (doubled triple 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). Removing the first "../" yields "....//"; the second removal yields "../". Depending on the algorithm, the product could be susceptible to CWE-34 but not CWE-35, or vice versa.
Weaknesses in this category are related to the A01 category "Broken Access Control" in the OWASP Top Ten 2021.
This category identifies Software Fault Patterns (SFPs) within the Path Traversal cluster (SFP16).
This view (slice) covers all the elements in CWE.
This view (slice) lists weaknesses that can be introduced during implementation.