CVE-2020-26290criticalCWE-347

CVE-2020-26290: critical vulnerability in dexidp dex

Critical security issues in XML encoding in Dex

Published 28 Dec 2020 · Updated 04 Aug 2024

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.3epss 1.0%

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/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Affected products

dexidp · dex

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In the same product, most dangerous first.

CVE-2022-39222CRITICALOAuth authorization code exposure in DexEPSS 1.6%CVE-2024-23656HIGHDex 2.37.0 is discarding TLSconfig and always serves deprecated TLS 1.0/1.1 and insecure ciphersEPSS 0.4%

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/