CVE-2022-41956 Information

Description

Autolab is a course management service initially developed by a team of students at Carnegie Mellon University that enables instructors to offer autograded programming assignments to their students over the Web. A file disclosure vulnerability was discovered in Autolab’s remote handin feature whereby users are able to hand-in assignments using paths outside their submission directory. Users can then view the submission to view the file’s contents. The vulnerability has been patched in version 2.10.0. As a workaround ensure that the field for the remote handin feature is empty (Edit Assessment > Advanced > Remote handin path) and that you are not running Autolab as root (or any user that has write access to /). Alternatively disable the remote handin feature if it is unneeded by replacing the body of local_submit in app/controllers/assessment/handin.rb with render(plain: \Feature disabled\ status: :bad_request) && return.

Reference

https://github.com/autolab/Autolab/security/advisories/GHSA-g7x7-mgrv-f24x https://www.stackhawk.com/blog/rails-path-traversal-guide-examples-and-prevention/