Vulnerability identifier: #VU33670

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-16136

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
tgstation-server
Server applications / Other server solutions

Vendor: tgstation13.org

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in "/Administration/Logs/" requests. A remote authenticated attacker can send a specially crafted HTTP request and download arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

tgstation-server: 4.4.0 - 4.4.1

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External links
http://github.com/tgstation/tgstation-server
http://github.com/tgstation/tgstation-server/security/advisories/GHSA-r8pp-42wr-2gc4

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.