VariantDraft

CWE-31Path Traversal: 'dir\..\..\filename'

Category: other

Description

The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize 'dir\..\..\filename' (multiple internal backslash dot dot) sequences that can resolve to a location that is outside of that directory.

Common consequences· 1

  • Confidentiality / Integrity — Read Files or Directories, Modify Files or Directories

Potential mitigations· 2

  • [Implementation]
  • [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.

References

  1. https://cwe.mitre.org/data/definitions/31.html

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CWE
Path Traversal: '\dir\..\filename'
CWE
Path Traversal: '\..\filename'
CWE
Path Traversal: 'dir/../../filename'
CWE
Path Traversal: '/dir/../filename'
CWE
Path Traversal: '..\filedir'
CWE
Path Traversal: '....' (Multiple Dot)
Sourced from MITRE CWE 4.20. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.