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Defending Python Applications Against Canonicalization Issues
When applications make security decisions based on untrusted input data that has not been canonicalized, malicious users can use these weaknesses to perform malicious actions, such as traversing file system directories, bypassing checks for restricted resources, and redirecting file system operations to unintended resources that may result in severe damages to your organization. Secure coding mitigations include resolving path traversal characters, removing extraneous duplicate characters, resolving embedded environment variables, and anchoring to a fixed location. This Defending Python Applications Against Canonicalization Issues Skill Lab uses an interactive simulation to train developers to identify and mitigate canonicalization vulnerabilities before they negatively impact your organization.
Course Overview
Learning Objectives
After completing this lab, the learner will understand how to fix canonicalization issues in Python applications by correctly converting filesystem paths constructed based on user input to canonical forms before validation. The learner will also receive hands-on experience testing for Path Traversal vulnerabilities, which is necessary to identify the vulnerable code and the solution.
Framework Connections
The materials within this course focus on the NICE Framework Task, Knowledge, and Skill statements identified within the indicated NICE Framework component(s):
Competency Areas
Feedback
If you would like to provide feedback on this course, please e-mail the NICCS team at NICCS@mail.cisa.dhs.gov. Please keep in mind that NICCS does not own this course or accept payment for course entry. If you have questions related to the details of this course, such as cost, prerequisites, how to register, etc., please contact the course training provider directly. You can find course training provider contact information by following the link that says “Visit course page for more information...” on this page.