CVE-2020-27846

high-risk

Published 2020-12-21

A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Do I need to act?

7.5% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (8)

Grafana

Saml

Openshift Container Platform

Openshift Service Mesh

Enterprise Linux

Fedora

Affected Vendors

Redhat Fedoraproject Grafana Saml Project

References (14)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1907670

Third Party Advisory https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9

Vendor Advisory https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-...

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Exploit https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/

Third Party Advisory https://security.netapp.com/advisory/ntap-20210205-0002/

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1907670

Third Party Advisory https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9

Vendor Advisory https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-...

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Exploit https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/

Third Party Advisory https://security.netapp.com/advisory/ntap-20210205-0002/

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high-risk

Severity 32/34 · Critical

Exploitability 10/34 · Low

Exposure 14/34 · Moderate