CVE-2019-11027 ruby-openid SSRF via claimed_id request
Remote attackers can bypass authentication in Ruby OpenID library integrations, potentially leading to account takeover, especially in apps using example code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-11027?
CVE-2019-11027 is a critical authentication bypass vulnerability in n/a, published on 10 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Ruby OpenID (aka ruby-openid) through 2.8.0 has a remotely exploitable flaw. This library is used by Rails web applications to integrate with OpenID Providers. 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.
Which versions are affected by CVE-2019-11027?
2 open source packages ship an affected version, including ruby-openid. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
ruby-openid RubyGems | All versions | 2.9.0 |
ruby-openid RubyGems | All versions | 2.9.0 |
Products include Openid Ruby-Openid.
How do I fix CVE-2019-11027?
Upgrade ruby-openid to 2.9.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2019-11027 being exploited?
There is no known exploitation of CVE-2019-11027 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2019-11027, DLA-1956-1, GHSA-fqfj-cmh6-hj49, UBUNTU-CVE-2019-11027.