Directory Traversal

Overview

Affected versions of tinyserver2 resolve relative file paths, resulting in a directory traversal vulnerability. A malicious actor can use this vulnerability to access files outside of the intended directory root, which may result in the disclosure of private files on the vulnerable system.

Example request:

GET /../../../../../../../../../../etc/passwd HTTP/1.1
host:foo

Recommendation

Update to v0.6.0 or later.

References

• https://github.com/JacksonGL/NPM-Vuln-PoC/tree/master/directory-traversal/tinyserver2
• GitHub Advisory