In short
- CVE-2020-26290 is a CRITICAL (CVSS 9.6) vulnerability affecting github.com/dexidp/dex, github.com/russellhaering/goxmldsig, dex (linuxfoundation).
- Chance of exploitation in the next 30 days (EPSS): 0.99%, higher than 62.5% of all vulnerabilities.
- Fix: update to 2.27.0, 1.1.0 or later.
Description
A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects dex versions before 2.27.0.
NVD description
Dex is a federated OpenID Connect provider written in Go. In Dex before version 2.27.0 there is a critical set of vulnerabilities which impacts users leveraging the SAML connector. The vulnerabilities enables potential signature bypass due to issues with XML encoding in the underlying Go library. The vulnerabilities have been addressed in version 2.27.0 by using the xml-roundtrip-validator from Mattermost (see related references).
More vulnerabilities in github.com/dexidp/dex
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