Critical security issues in XML encoding in github.com/dexidp/dex
### 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.
describes (2)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-27847US | critical9.8 | — | ||
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 authenticat… | ||||
| CVE-2020-26290US | critical9.6 | — | ||
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.… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8WEB
- https://github.com/dexidp/dex/releases/tag/v2.27.0WEB
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5WEB
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.mdWEB
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.mdWEB
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.mdWEB
- https://github.com/russellhaering/goxmldsig/commit/f6188febf0c29d7ffe26a0436212b19cb9615e64WEB
- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7WEB
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