GHSA-m9hp-7r99-94h5

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GHSA-m9hp-7r99-94h5

Summary: Critical security issues in XML encoding in github.com/dexidp/dex

Details: ### Impact The following vulnerabilities have been disclosed, which impact users leveraging the SAML connector: Signature Validation Bypass (CVE-2020-15216): https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7 `encoding/xml` instabilities: - [Element namespace prefix instability (CVE-2020-29511)](https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md) - [Attribute namespace prefix instability (CVE-2020-29509)](https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md) - [Directive comment instability (CVE-2020-29510)](https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md) ### Patches Immediately update to [Dex v2.27.0](https://github.com/dexidp/dex/releases/tag/v2.27.0). ### Workarounds There are no known workarounds.

References: https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5, https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7, https://nvd.nist.gov/vuln/detail/CVE-2020-26290, https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8, https://github.com/russellhaering/goxmldsig/commit/f6188febf0c29d7ffe26a0436212b19cb9615e64, https://github.com/dexidp/dex/releases/tag/v2.27.0, 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://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities, https://pkg.go.dev/vuln/GO-2020-0050