Path Equivalence: '/multiple//internal/slash'

Opis

The product accepts path input in the form of multiple internal slash ('/multiple//internal/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.

Przykłady podatności

• CVE-2002-1483 Read files with full pathname using multiple internal slash.

Słabość nadrzędna

• CWE-41 Improper Resolution of Path Equivalence

Kiedy powstaje

• Implementation

Dotyczy

Not Language-Specific