Vulnerability Details CVE-2020-26290
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).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 64.9%
CVSS Severity
CVSS v3 Score 9.3
CVSS v2 Score 6.8
References
- https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8
- https://github.com/dexidp/dex/releases/tag/v2.27.0
- 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
- 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/
Products affected by CVE-2020-26290
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cpe:2.3:a:linuxfoundation:dex:-
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cpe:2.3:a:linuxfoundation:dex:0.1.0
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cpe:2.3:a:linuxfoundation:dex:0.2.0
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cpe:2.3:a:linuxfoundation:dex:0.2.1
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cpe:2.3:a:linuxfoundation:dex:0.2.2
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cpe:2.3:a:linuxfoundation:dex:0.2.3
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cpe:2.3:a:linuxfoundation:dex:0.3.0
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cpe:2.3:a:linuxfoundation:dex:0.4.0
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cpe:2.3:a:linuxfoundation:dex:0.5.0
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cpe:2.3:a:linuxfoundation:dex:0.5.1
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cpe:2.3:a:linuxfoundation:dex:0.6.0
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cpe:2.3:a:linuxfoundation:dex:0.6.1
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cpe:2.3:a:linuxfoundation:dex:2.0.0
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cpe:2.3:a:linuxfoundation:dex:2.0.1
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cpe:2.3:a:linuxfoundation:dex:2.0.2
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cpe:2.3:a:linuxfoundation:dex:2.1.0
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cpe:2.3:a:linuxfoundation:dex:2.10.0
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cpe:2.3:a:linuxfoundation:dex:2.11.0
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cpe:2.3:a:linuxfoundation:dex:2.12.0
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cpe:2.3:a:linuxfoundation:dex:2.13.0
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cpe:2.3:a:linuxfoundation:dex:2.14.0
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cpe:2.3:a:linuxfoundation:dex:2.15.0
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cpe:2.3:a:linuxfoundation:dex:2.16.0
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cpe:2.3:a:linuxfoundation:dex:2.17.0
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cpe:2.3:a:linuxfoundation:dex:2.18.0
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cpe:2.3:a:linuxfoundation:dex:2.19.0
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cpe:2.3:a:linuxfoundation:dex:2.2.0
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cpe:2.3:a:linuxfoundation:dex:2.2.1
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cpe:2.3:a:linuxfoundation:dex:2.2.2
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cpe:2.3:a:linuxfoundation:dex:2.2.3
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cpe:2.3:a:linuxfoundation:dex:2.2.4
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cpe:2.3:a:linuxfoundation:dex:2.2.5
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cpe:2.3:a:linuxfoundation:dex:2.20.0
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cpe:2.3:a:linuxfoundation:dex:2.21.0
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cpe:2.3:a:linuxfoundation:dex:2.22.0
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cpe:2.3:a:linuxfoundation:dex:2.23.0
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cpe:2.3:a:linuxfoundation:dex:2.24.0
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cpe:2.3:a:linuxfoundation:dex:2.25.0
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cpe:2.3:a:linuxfoundation:dex:2.26.0
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cpe:2.3:a:linuxfoundation:dex:2.3.0
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cpe:2.3:a:linuxfoundation:dex:2.3.1
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cpe:2.3:a:linuxfoundation:dex:2.4.0
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cpe:2.3:a:linuxfoundation:dex:2.4.1
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cpe:2.3:a:linuxfoundation:dex:2.5.0
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cpe:2.3:a:linuxfoundation:dex:2.6.0
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cpe:2.3:a:linuxfoundation:dex:2.6.1
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cpe:2.3:a:linuxfoundation:dex:2.7.0
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cpe:2.3:a:linuxfoundation:dex:2.7.1
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cpe:2.3:a:linuxfoundation:dex:2.8.0
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cpe:2.3:a:linuxfoundation:dex:2.8.1
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cpe:2.3:a:linuxfoundation:dex:2.9.0