Critical security issues in XML encoding in Dex
Vulnerability 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).
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
Am I Vulnerable?
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5
- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7
- https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8
- https://github.com/dexidp/dex/releases/tag/v2.27.0
Affected Vendor
dexidp
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