#VU62316 Input validation error in lua-nginx-module - CVE-2020-36309

Vulnerability identifier: #VU62316

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-36309

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
lua-nginx-module
Web applications / Modules and components for CMS

Vendor: OpenResty Inc.

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing URI in HTTP requests. A remote attacker can send a specially crafted HTTP request to the server and modify its response. As a result, an attacker can perform spoofing attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

lua-nginx-module: 0.10.0 rc0 - 0.10.15

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External links
https://github.com/openresty/lua-nginx-module/compare/v0.10.15...v0.10.16
https://github.com/openresty/lua-nginx-module/pull/1654
https://news.ycombinator.com/item?id=26712562
https://security.netapp.com/advisory/ntap-20210507-0005/

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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.