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MFA Bypass through password reset function could allow account takeover of a compromised email

Moderate
martinemde published GHSA-4v23-vj8h-7jp2 Jan 8, 2024

Package

bundler Rubygems.org (RubyGems)

Affected versions

< 2024-01-08 03:00 UTC

Patched versions

>= 2024-01-08 03:00 UTC

Description

Impact

Rubygems.org users with MFA enabled would normally be protected from account takeover in the case of email account takeover. However, a workaround on the forgotten password form allows an attacker to bypass the MFA requirement and takeover the account.

The attack requires email account takeover or the compromise of a forgotten password token to take advantage of the vulnerability.

Patches

0b3272a

Workarounds

No.

References

Undisclosed submission to RubyGems HackerOne program

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CVE ID

CVE-2024-21654

Weaknesses

No CWEs