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).
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
| Link | Tags |
|---|---|
| https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md | third party advisory not applicable |
| https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md | third party advisory not applicable |
| https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md | third party advisory not applicable |
| https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ | third party advisory not applicable |
| https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5 | third party advisory |
| https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7 | third party advisory not applicable |
| https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8 | third party advisory patch |
| https://github.com/dexidp/dex/releases/tag/v2.27.0 | third party advisory |