Critical security issues in XML encoding in Dex
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 1.0%
exploitation probability
1.0%top 41% of all CVEs
observed exploitation
nono source reports it
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 · dexReferences
https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8https://github.com/dexidp/dex/releases/tag/v2.27.0https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.mdhttps://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.mdhttps://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.mdhttps://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/