CVE-2024-41799: tgstation-server Path Traversal — Fix

Description

tgstation-server is a production scale tool for BYOND server management. Prior to 6.8.0, low permission users using the "Set .dme Path" privilege could potentially set malicious .dme files existing on the host machine to be compiled and executed. These .dme files could be uploaded via tgstation-server (requiring a separate, isolated privilege) or some other means. A server configured to execute in BYOND's trusted security level (requiring a third separate, isolated privilege OR being set by another user) could lead to this escalating into remote code execution via BYOND's shell() proc. The ability to execute this kind of attack is a known side effect of having privileged TGS users, but normally requires multiple privileges with known weaknesses. This vector is not intentional as it does not require control over the where deployment code is sourced from and _may_ not require remote write access to an instance's `Configuration` directory. This problem is fixed in versions 6.8.0 and above.

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CVSS v3.1 Score

8.4

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:H

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
tgstation13	tgstation-server	4.0.0 — 6.8.0

References

Advisories & Patches

https://github.com/tgstation/tgstation-server/commit/374852fe5ae306415eb5aafb2d16b06897d7afe4 https://github.com/tgstation/tgstation-server/security/advisories/GHSA-c3h4-9gc2-f7h4 https://github.com/tgstation/tgstation-server/commit/374852fe5ae306415eb5aafb2d16b06897d7afe4 https://github.com/tgstation/tgstation-server/security/advisories/GHSA-c3h4-9gc2-f7h4

Other References

https://github.com/tgstation/tgstation-server/pull/1835 https://github.com/tgstation/tgstation-server/pull/1835

Frequently Asked Questions

What is CVE-2024-41799? +

tgstation-server is a production scale tool for BYOND server management. Prior to 6.8.0, low permission users using the "Set .dme Path" privilege could potentially set malicious .dme files existing on the host machine to be compiled and executed. These .dme files could be uploaded via tgstation-server (requiring a separate, isolated privilege) or some other means. A server configured to execute in BYOND's trusted security level (requiring a third separate, isolated privilege OR being set by another user) could lead to this escalating into remote code execution via BYOND's shell() proc. The ability to execute this kind of attack is a known side effect of having privileged TGS users, but normally requires multiple privileges with known weaknesses. This vector is not intentional as it does not require control over the where deployment code is sourced from and _may_ not require remote write access to an instance's `Configuration` directory. This problem is fixed in versions 6.8.0 and above. It has a CVSS v3.1 base score of 8.4 (HIGH).

How severe is CVE-2024-41799? +

CVE-2024-41799 has a CVSS v3.1 score of 8.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-41799? +

CVE-2024-41799 affects products from tgstation13, specifically: tgstation-server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-41799? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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