Path Equivalence: '\multiple\\internal\backslash'

Opis

The product accepts path input in the form of multiple internal backslash ('\multiple\trailing\\slash') without appropriate validation, which can lead to ambiguous path resolution and allow an attacker to traverse the file system to unintended locations or access arbitrary files.

Skutki

• Confidentiality, Integrity

  Read Files or Directories; Modify Files or Directories

Zapobieganie

• Implementation · Input Validation

  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.

Słabość nadrzędna

• CWE-41 Improper Resolution of Path Equivalence
• CWE-165 Improper Neutralization of Multiple Internal Special Elements

Kiedy powstaje

• Implementation

Dotyczy

Not Language-Specific