Open redirect in Ruby on Rails - CVE-2021-22881
Published: February 11, 2021
Vulnerability identifier: #VU50607
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-22881
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data, when the allowed host starts with a dot. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
Affected software
Ruby on Rails
Fedora
rubygem-actionpack
rubygem-activerecord
Fedora
rubygem-actionpack
rubygem-activerecord
How to mitigate CVE-2021-22881
Install updates from vendor's website.
Ruby on Rails - addressed in versions 6.0.3.5, 6.1.2.1
rubygem-actionpack - update to 6.0.3.4-2.fc33
rubygem-activerecord - update to 6.0.3.4-2.fc33
rubygem-actionpack - update to 6.0.3.4-2.fc33
rubygem-activerecord - update to 6.0.3.4-2.fc33