#VU67621 Missing support for integrity check in Rack - CVE-2020-8184

Vulnerability identifier: #VU67621

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-8184

CWE-ID: CWE-353

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rack
Web applications / Modules and components for CMS

Vendor: Rack

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to missing integrity check of secure cookies. A remote attacker can alter the cookies in the requests and bypass implemented security restrictions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rack: 2.1.0 - 2.1.3, 2.2.0 - 2.2.2

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External links
https://groups.google.com/g/rubyonrails-security/c/OWtmozPH9Ak
https://hackerone.com/reports/895727
https://lists.debian.org/debian-lts-announce/2020/07/msg00006.html
https://usn.ubuntu.com/4561-1/

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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.