CVE-2019-11027 — Vulnerability in ruby-openid — CVE Details

CRITICAL

ruby-openid SSRF via claimed_id request

Published June 13, 2019Updated February 16, 2024Source: osv

Summary

Ruby OpenID (aka ruby-openid) through 2.8.0 is vulnerable to SSRF. Ruby-openid performs discovery first, and then verification. This allows an attacker to change the URL used for discovery and trick the server into connecting to the URL, which might be a private server not publicly accessible. Severity can range from medium to critical, depending on how a web application developer chose to employ the ruby-openid library. Developers who based their OpenID integration heavily on the "example app" provided by the project are at highest risk.

Advisory Timeline

First published June 13, 2019 (2678 days ago).
Last revised February 16, 2024 — 1709 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler

Update ruby-openid to 2.9.0 or later

gem install ruby-openid -v 2.9.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

Package	Ecosystem	Affected	Fixed In
ruby-openid	rubygems	1.0, 1.0.1, 1.0.2, 1.1.1 (+23 more)	2.9.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-918
Server-Side Request Forgery (SSRF)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2019-11027?: ruby-openid SSRF via claimed_id request This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2019-11027?: CVE-2019-11027 affects ruby-openid. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2019-11027 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-fqfj-cmh6-hj49

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