Vulnerability · Published Nov 18, 2024 · Assigned by GitHub_M

CVE-2024-51499MarkUs Arbitrary File Write leading up to remote code execution (student accounts)

High 7.1

In plain English

A high-severity unrestricted file upload in Markus from MarkUsProject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.7%top 46.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

MarkUs is a web application for the submission and grading of student assignments. In versions prior to 2.4.8, an arbitrary file write vulnerability accessible via the update_files method of the SubmissionsController allows authenticated users (e.g. students) to write arbitrary files to any location on the web server MarkUs is running on (depending on the permissions of the underlying filesystem). e.g. This can lead to a delayed remote code execution in case an attacker is able to write a Ruby file into the config/initializers/ subfolder of the Ruby on Rails application. MarkUs v2.4.8 has addressed this issue. No known workarounds are available at the application level aside from upgrading.

Affected products (as reported)

Vendor	Product	Versions
MarkUsProject	Markus	< 2.4.8

Weakness: CWE-434 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://github.com/MarkUsProject/Markus/security/advisories/GHSA-j95p-7936-f75w x_refsource_CONFIRM
https://github.com/MarkUsProject/Markus/pull/7026 x_refsource_MISC