Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLW05aHAtN3I5OS05NGg1

Critical security issues in XML encoding in github.com/dexidp/dex

Impact

The following vulnerabilities have been disclosed, which impact users leveraging the SAML connector:

Signature Validation Bypass (CVE-2020-15216): https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7

encoding/xml instabilities:

• Element namespace prefix instability (CVE-2020-29511)
• Attribute namespace prefix instability (CVE-2020-29509)
• Directive comment instability (CVE-2020-29510)

Patches

Immediately update to Dex v2.27.0.

Workarounds

There are no known workarounds.

Permalink: https://github.com/advisories/GHSA-m9hp-7r99-94h5
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLW05aHAtN3I5OS05NGg1
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 2 years ago
Updated: 7 months ago

CVSS Score: 9.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Identifiers: GHSA-m9hp-7r99-94h5, CVE-2020-26290
References:

• https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5
• https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7
• https://nvd.nist.gov/vuln/detail/CVE-2020-26290
• https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8
• https://github.com/dexidp/dex/releases/tag/v2.27.0
• https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md
• https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md
• https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md
• https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/
• https://github.com/russellhaering/goxmldsig/commit/f6188febf0c29d7ffe26a0436212b19cb9615e64
• https://pkg.go.dev/vuln/GO-2020-0050
• https://github.com/advisories/GHSA-m9hp-7r99-94h5

Repository: https://github.com/dexidp/dex
Blast Radius: 29.6

Affected Packages