#VU61251 Path traversal in CivetWeb - CVE-2020-27304

Vulnerability identifier: #VU61251

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-27304

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
CivetWeb
Universal components / Libraries / Libraries used by multiple products

Vendor: civetweb

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 within the mg_handle_form_request API. A remote attacker can send a specially crafted HTTP request and upload arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

CivetWeb: 1.8 - 1.14

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External links
https://jfrog.com/blog/cve-2020-27304-rce-via-directory-traversal-in-civetweb-http-server/
https://groups.google.com/g/civetweb/c/yPBxNXdGgJQ

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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