Affected versions of augustine 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.

Proof of Concept

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

Recommendation

No direct patch is available at this time.

Currently, the best mitigation for this flaw is to use a different, functionally equivalent static file server package.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-0930
• https://hackerone.com/reports/296282
• GHSA-4wch-fwmx-cf47
• https://www.npmjs.com/advisories/559