CVE-2021-41263 Secure/signed cookies share secrets between sites in rails_multisite

2021-11-1520:10:11

CWE-565

CWE-200

GitHub_M

www.cve.org

8.3 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

HIGH

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

8.9 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

43.0%

JSON

rails_multisite provides multi-db support for Rails applications. In affected versions this vulnerability impacts any Rails applications using rails_multisite alongside Rails’ signed/encrypted cookies. Depending on how the application makes use of these cookies, it may be possible for an attacker to re-use cookies on different ‘sites’ within a multi-site Rails application. The issue has been patched in v4 of the rails_multisite gem. Note that this upgrade will invalidate all previous signed/encrypted cookies. The impact of this invalidation will vary based on the application architecture.

CNA Affected

[
  {
    "product": "rails_multisite",
    "vendor": "discourse",
    "versions": [
      {
        "status": "affected",
        "version": "< 4.0.0"
      }
    ]
  }
]