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HackeroneCVE-2021-22903

HistoryJun 11, 2021 - 4:15 p.m.

CVE-2021-22903

2021-06-1116:15:11

CWE-601

hackerone

web.nvd.nist.gov

cve-2021-22903

nvd

actionpack

ruby

gem

open redirect

vulnerability

host headers

security

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS3

6.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

AI Score

Confidence

High

EPSS

0.002

Percentile

61.0%

JSON

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

Nvd

Vulners

Node

rubyonrailsrailsRange6.1.1–6.1.3.2

rubyonrailsrailsMatch6.1.0rc2

VendorProductVersionCPE
rubyonrailsrails6.1.0cpe:/a:rubyonrails:rails:6.1.0:rc2::

Vendor	Product	Version	CPE
rubyonrails	rails	6.1.0	cpe:/a:rubyonrails:rails:6.1.0:rc2::

CNA Affected

[
  {
    "product": "https://github.com/rails/rails",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Fixed in 6.1.3.2"
      }
    ]
  }
]