Detail CWE-34

The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '....//' (doubled dot dot slash) sequences that can resolve to a location that is outside of that directory.

Mode Pengenalan

Implementation

Platform yang Berlaku

Bahasa

Kelas: Not Language-Specific (Undetermined)

Konsekuensi Umum

Contoh yang Diamati

Mitigasi yang Memungkinkan

Phases : Implementation
Phases : 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.

Metode Deteksi

Automated Static Analysis - Source Code

Efektivitas : SOAR Partial

Architecture or Design Review

Efektivitas : High

Catatan Pemetaan Kerentanan

Justifikasi : This CWE entry is at the Variant level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Komentar : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Catatan

This could occur due to a cleansing error that removes a single "../" from "....//"

Referensi

REF-1479

State-of-the-Art Resources (SOAR) for Software Vulnerability Detection, Test, and Evaluation
Gregory Larsen, E. Kenneth Hong Fong, David A. Wheeler, Rama S. Moorthy.
https://www.ida.org/-/media/feature/publications/s/st/stateoftheart-resources-soar-for-software-vulnerability-detection-test-and-evaluation/p-5061.ashx

Pengajuan

Modifikasi