Vulnerability Monitor

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CVE-2020-27846

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.

Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 6 products from grafana, from saml_project, from redhat and 3 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-12-21T16:15:13.067

Last Modified

2024-11-21T05:21:55.503

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

10.0

Weaknesses

Type: Secondary
CWE-115

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	grafana	grafana	< 6.7.5	Yes
Application	grafana	grafana	< 7.2.3	Yes
Application	grafana	grafana	< 7.3.6	Yes
Application	saml_project	saml	< 0.4.3	Yes
Application	redhat	openshift_container_platform	3.11	Yes
Application	redhat	openshift_container_platform	4.0	Yes
Application	redhat	openshift_service_mesh	2.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	fedoraproject	fedora	32	Yes
Operating System	fedoraproject	fedora	33	Yes

References

https://bugzilla.redhat.com/show_bug.cgi?id=1907670 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9 Third Party Advisory ([email protected])
https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/ Vendor Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/ ([email protected])
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ Exploit, Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20210205-0002/ Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1907670 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/ (af854a3a-2127-422b-91ae-364da2661108)
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20210205-0002/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For grafana's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.