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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2020-26290 Detail

Description

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).


Severity

 


CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  9.6 CRITICAL
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
Base Score:  9.3 CRITICAL
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8 Patch  Third Party Advisory 
https://github.com/dexidp/dex/releases/tag/v2.27.0 Third Party Advisory 
https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5 Third Party Advisory 
https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md Not Applicable  Third Party Advisory 
https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md Not Applicable  Third Party Advisory 
https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md Not Applicable  Third Party Advisory 
https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7 Not Applicable  Third Party Advisory 
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ Not Applicable  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-347 Improper Verification of Cryptographic Signature Provider acceptance level GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-26290
NVD Published Date:
12/28/2020
NVD Last Modified:
12/30/2020
Source:
GitHub, Inc.