Improper Authentication Affecting github.com/crewjam/saml package, versions <0.4.9
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Improper Authentication vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMCREWJAMSAML-3150397
- published29 Nov 2022
- disclosed29 Nov 2022
- creditFelix Wilhelm
Introduced: 29 Nov 2022
CVE-2022-41912 (opens in a new tab)How to fix?
Upgrade github.com/crewjam/saml to version 0.4.9 or higher.
Overview
github.com/crewjam/saml is a package that contains a partial implementation of the SAML standard in golang. SAML is a standard for identity federation, i.e. either allowing a third party to authenticate your users or allowing third parties to rely on us to authenticate their users.
Affected versions of this package are vulnerable to Improper Authentication when processing SAML responses containing multiple Assertion elements, resulting in a signature bypass. This allows an unauthenticated attacker in possession of a single valid signed SAML assertion to embed arbitrary data in a second, unsigned SAML assertion, which is then passed on to the application.
Note:
This vulnerability will affect a subsequent component (which is protected by the authentication mechanism), however, the attacker has no control over the information they can access or modify.