Affected versions of node-simple-router 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 v0.10.1 or later.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-16083
• sandy98/node-simple-router@dfdd52e
• https://github.com/JacksonGL/NPM-Vuln-PoC/tree/master/directory-traversal/node-simple-router
• GHSA-5w8q-x7hc-jhp6
• https://www.npmjs.com/advisories/352