CVEvulnerability

CVE-2021-22903

6.1 MEDIUM Published 2021-06-11 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-06-11
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0 ([email protected])
5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:N
Weaknesses
CWE-601

Description

The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. This is similar to CVE-2021-22881. Strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, `config.hosts << "sub.example.com"` to permit a request with a Host header value of `sub-example.com`.

Affected configurations

• rubyonrails rails (>= 6.1.1 < 6.1.3.2) • rubyonrails rails 6.1.0

Related

Weakness · CWE (1)

  • CWE-601 URL Redirection to Untrusted Site weakness

References