CVE-2020-26290
In Dex before version 2.27.0 there is a critical set of vulnerabilities which impacts users leveraging the SAML connector.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.98%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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).
- CVSS 3.1
- 9.6 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- EPSS
- 0.98% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-347
- Affected
- linuxfoundation/dex
- Source
- security-advisories@github.com
References
- https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8Patch, Third Party Advisory
- https://github.com/dexidp/dex/releases/tag/v2.27.0Third Party Advisory
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.mdNot Applicable, Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.mdNot Applicable, Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.mdNot Applicable, Third Party Advisory
- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7Not Applicable, Third Party Advisory
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/Not Applicable, Third Party Advisory
- https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8Patch, Third Party Advisory
- https://github.com/dexidp/dex/releases/tag/v2.27.0Third Party Advisory
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.mdNot Applicable, Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.mdNot Applicable, Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.mdNot Applicable, Third Party Advisory
- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7Not Applicable, Third Party Advisory
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/Not Applicable, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.