CVE-2020-26290

Published

Last updated

NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-26290

CGA ID

CGA-w29q-h459-6537

Severity

9.6

Critical

CVSS V3

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).

References

https://images.chainguard.dev/security/CGA-w29q-h459-6537
https://github.com/advisories/GHSA-m9hp-7r99-94h5
https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5
https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md
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/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/
https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8
https://github.com/dexidp/dex/releases/tag/v2.27.0

Affected packages

Advisories are based on vulnerability information provided by Grype from Anchore. Learn how Chainguard creates security advisories.

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CVE-2020-26290

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