CVE-2022-41956

Summary

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.

Affected Software

Weaknesses

• CWE-22: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

ADP Enrichment

CVE Program Container

Additional References

• https://github.com/autolab/Autolab/security/advisories/GHSA-g7x7-mgrv-f24x
• https://securitylab.github.com/advisories/GHSL-2022-100_Autolab/
• https://www.stackhawk.com/blog/rails-path-traversal-guide-examples-and-prevention/

References

• https://github.com/autolab/Autolab/security/advisories/GHSA-g7x7-mgrv-f24x
• https://securitylab.github.com/advisories/GHSL-2022-100_Autolab/
• https://www.stackhawk.com/blog/rails-path-traversal-guide-examples-and-prevention/

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