CVE-2020-26290

CVSS V2 Medium 6.8 CVSS V3 Critical 9.6
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).
Overview
  • CVE ID
  • CVE-2020-26290
  • Assigner
  • security-advisories@github.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-12-28T20:15:12
  • Last Modified Date
  • 2020-12-30T15:12:28
Weakness Enumerations
CWE URL
CWE-347 http://cwe.mitre.org/data/definitions/347.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:linuxfoundation:dex:*:*:*:*:*:*:*:* 1 OR 2.27.0
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 6.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • CHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 9.6
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 2.8
  • Impact Score
  • 6
References
Reference URL Reference Tags
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://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ Not Applicable Third Party Advisory
https://github.com/dexidp/dex/releases/tag/v2.27.0 Third Party Advisory
https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8 Patch Third Party Advisory
https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7 Not Applicable Third Party Advisory
https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md Not Applicable Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-26290
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26290
History
Created Old Value New Value Data Type Notes
2022-05-10 07:29:11 Added to TrackCVE
2022-12-05 18:55:08 2020-12-28T20:15Z 2020-12-28T20:15:12 CVE Published Date updated
2022-12-05 18:55:08 2020-12-30T15:12:28 CVE Modified Date updated
2022-12-05 18:55:08 Analyzed Vulnerability Status updated