tilde expansion

Tilde expansion is the process by which the tilde character (~) is replaced with a user's home directory path, commonly used in Unix-like systems. On WindowsForum.com, discussions focus on security vulnerabilities arising from improper tilde expansion, particularly in tools like curl. A notable example is CVE-2023-27534, a path-traversal flaw in curl's SFTP handling where tilde expansion occurred in unintended locations, allowing crafted paths like /~2/foo to bypass restrictions and access other users' files. Topics include the technical root cause, exploitation scenarios, patching timelines, severity assessments, and practical mitigations for defenders. Understanding tilde expansion is crucial for secure file path handling in cross-platform environments.