#VU31287 Path traversal in serve - CVE-2018-3712

Vulnerability identifier: #VU31287

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-3712

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
serve
Web applications / JS libraries

Vendor: Zeit

Description

The vulnerability allows a remote authenticated user to gain access to sensitive information.

serve node module before 6.4.9 suffers from a Path Traversal vulnerability due to not handling %2e (.) and %2f (/) and allowing them in paths, which allows a malicious user to view the contents of any directory with known path.

Mitigation
Install update from vendor's website.

Vulnerable software versions

serve: 6.4.0 - 6.4.8

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External links
https://github.com/zeit/serve/pull/316
https://hackerone.com/reports/307666

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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.