by Kastro
Paper/Archive/CVE-2020-26290

CVE-2020-26290

dexidp dex — Critical security issues in XML encoding in Dex

EPSS 1.0%CVSS 9.6
critical.is priorityof 100
41
CVSS 9.6 (NVD)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 62.5.625 × 2012.5No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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).

Affected

ProductAffectedFixed inSource
dex< 2.27.0–CNA

Scores by source

NVD9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
GitHub_M (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

References

refgithub.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.mdrefgithub.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.mdrefgithub.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.mdrefmattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilitiesrefgithub.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5refgithub.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7refgithub.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8refgithub.com/dexidp/dex/releases/tag/v2.27.0