CVE-2021-28680 Information

Description

The devise_masquerade gem before 1.3 allows certain attacks when a password’s salt is unknown. An application that uses this gem to let administrators masquerade/impersonate users loses one layer of security protection compared to a situation where Devise (without this extension) is used. If the server-side secret_key_base value became publicly known (for instance if it is committed to a public repository by mistake) there are still other protections in place that prevent an attacker from impersonating any user on the site. When masquerading is not used in a plain Devise application one must know the password salt of the target user if one wants to encrypt and sign a valid session cookie. When devise_masquerade is used however an attacker can decide which user the ack\ action will go back to without knowing that user’s password salt and simply knowing the user ID by manipulating the session cookie and pretending that a user is already masqueraded by an administrator.

CVSS Vector

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

Reference

https://github.com/oivoodoo/devise_masquerade/issues/83 https://labanskoller.se/blog/2021/03/23/the-devise-extension-that-peeled-off-one-layer-of-the-security-onion-cve-2021-28680/

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1