Path Equivalence: '/multiple/trailing/slash//'

Opis

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

Przykłady podatności

• CVE-2002-1078 Directory listings in web server using multiple trailing slash

Słabość nadrzędna

• CWE-41 Improper Resolution of Path Equivalence
• CWE-163 Improper Neutralization of Multiple Trailing Special Elements

Może prowadzić do

• CWE-289 Authentication Bypass by Alternate Name

Kiedy powstaje

• Implementation

Dotyczy

Not Language-Specific, Not Technology-Specific, Web Based