#VU28241 Cross-site request forgery in ActionView - CVE-2020-8167

Vulnerability identifier: #VU28241

Vulnerability risk: Low

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:Clear]

CVE-ID: CVE-2020-8167

CWE-ID: CWE-352

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ActionView
Server applications / Frameworks for developing and running applications

Vendor: Rails

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

This is a regression of CVE-2015-1840.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ActionView: 5.0.0 - 6.0.3

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External links
https://snyk.io/vuln/SNYK-RUBY-ACTIONVIEW-569601
https://github.com/rails/rails/commit/a20fbf9bc52e9596a675c1071ab3fe052ac4f0dc
https://groups.google.com/forum/#!topic/rubyonrails-security/x9DixQDG9a0

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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.