#VU53001 Information disclosure in Ruby on Rails - CVE-2021-22885

Vulnerability identifier: #VU53001

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-22885

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ruby on Rails
Universal components / Libraries / Scripting languages

Vendor: Rails

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to improper input validation in the Action Pack within the "redirect_to" or "polymorphic_url" helper. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Ruby on Rails: 1.0.0, 1.1.0 - 1.1.6, 1.2.0 - 1.2.6, 1.9.5, 2.0.0

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External links
https://seclists.org/oss-sec/2021/q2/101

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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.