CWE-27Path Traversal: 'dir/../../filename'

Description

The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize multiple internal "../" sequences that can resolve to a location that is outside of that directory.

[object Object]

Common consequences

• Confidentiality,Integrity→Read Files or Directories,Modify Files or Directories

Potential mitigations

• Implementation
  [object Object]
• Implementation
  Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.

Related CWEs

Recent CVEs classified under this CWE