What’s Vulnerable › Vulnerabilities

CVE-2023-32676: Autolab tar slip in Install Assessment functionality (`GHSL-2023-081`)

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-26 · updated 2026-06-17
• Weakness: CWE-22

Description

Autolab is a course management service that enables auto-graded programming assignments. A Tar slip vulnerability was found in the Install assessment functionality of Autolab. To exploit this vulnerability an authenticated attacker with instructor permissions needs to upload a specially crafted Tar file. Using the install assessment functionality an attacker can feed a Tar file that contain files with paths pointing outside of the target directory (e.g., `../../../../tmp/tarslipped1.sh`). When the Install assessment form is submitted the files inside of the archives are expanded to the attacker-chosen locations. This issue has been addressed in version 2.11.0. Users are advised to upgrade.

Affected products

• Autolab: before 2.11.0 — fixed in 2.11.0

How to fix

Upgrade to a fixed version: Autolab 2.11.0. Check the vendor advisory for mitigations.

References

• https://github.com/autolab/Autolab/commit/14f508484a8323eceb0cf3a128573b43eabbc80d
• https://github.com/autolab/Autolab/security/advisories/GHSA-x9hj-r9q4-832c
• https://securitylab.github.com/advisories/GHSL-2023-081_GHSL-2023-082_Autolab/
• https://github.com/autolab/Autolab/commit/14f508484a8323eceb0cf3a128573b43eabbc80d
• https://github.com/autolab/Autolab/security/advisories/GHSA-x9hj-r9q4-832c
• https://securitylab.github.com/advisories/GHSL-2023-081_GHSL-2023-082_Autolab/

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