CVE-2024-21654: rubygems.org Auth Bypass — Fix

Description

Rubygems.org is the Ruby community's gem hosting service. 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. This vulnerability has been patched in commit 0b3272a.

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CVSS v3.1 Score

4.8

MEDIUM

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

Weakness Type (CWE)

CWE-287 Improper Authentication

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
rubygems	rubygems.org	< 2024-01-08

References

Advisories & Patches

https://github.com/rubygems/rubygems.org/commit/0b3272ac17b45748ee0d1867c49867c7deb26565 https://github.com/rubygems/rubygems.org/security/advisories/GHSA-4v23-vj8h-7jp2 https://github.com/rubygems/rubygems.org/commit/0b3272ac17b45748ee0d1867c49867c7deb26565 https://github.com/rubygems/rubygems.org/security/advisories/GHSA-4v23-vj8h-7jp2

Frequently Asked Questions

What is CVE-2024-21654? +

Rubygems.org is the Ruby community's gem hosting service. 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. This vulnerability has been patched in commit 0b3272a. It has a CVSS v3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2024-21654? +

CVE-2024-21654 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-21654? +

CVE-2024-21654 affects products from rubygems, specifically: rubygems.org. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-21654? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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