CVE-2020-27846

crewjam/saml: authentication bypass in saml authentication

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se presenta una vulnerabilidad de verificación de firmas en crewjam/saml. Este fallo permite a un atacante omitir la autenticación SAML. La mayor amenaza de esta vulnerabilidad es la confidencialidad, la integridad y la disponibilidad del sistema

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.7.0. Issues addressed include bypass, denial of service, integer overflow, man-in-the-middle, and memory leak vulnerabilities.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-10-27 CVE Reserved
2020-12-21 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-115: Misinterpretation of Input

CAPEC

References (8)

URL	Tag	Source
https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0002	Third Party Advisory

URL	Date	SRC
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities	2024-08-04

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1907670	2021-05-18

URL	Date	SRC
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	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-27846	2021-05-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Grafana Search vendor "Grafana"		Grafana Search vendor "Grafana" for product "Grafana"				< 6.7.5 Search vendor "Grafana" for product "Grafana" and version " < 6.7.5"		enterprise		Affected
Grafana Search vendor "Grafana"		Grafana Search vendor "Grafana" for product "Grafana"				>= 7.0.0 < 7.2.3 Search vendor "Grafana" for product "Grafana" and version " >= 7.0.0 < 7.2.3"		enterprise		Affected
Grafana Search vendor "Grafana"		Grafana Search vendor "Grafana" for product "Grafana"				>= 7.3.0 < 7.3.6 Search vendor "Grafana" for product "Grafana" and version " >= 7.3.0 < 7.3.6"		enterprise		Affected
Saml Project Search vendor "Saml Project"		Saml Search vendor "Saml Project" for product "Saml"				< 0.4.3 Search vendor "Saml Project" for product "Saml" and version " < 0.4.3"		-		Affected
Redhat Search vendor "Redhat"		Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform"				3.11 Search vendor "Redhat" for product "Openshift Container Platform" and version "3.11"		-		Affected
Redhat Search vendor "Redhat"		Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform"				4.0 Search vendor "Redhat" for product "Openshift Container Platform" and version "4.0"		-		Affected
Redhat Search vendor "Redhat"		Openshift Service Mesh Search vendor "Redhat" for product "Openshift Service Mesh"				2.0 Search vendor "Redhat" for product "Openshift Service Mesh" and version "2.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected