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  5. CVE-2020-26290

CVE-2020-26290: Improper Verification of Cryptographic Signature

December 28, 2020 (updated December 30, 2020)

Dex is a federated OpenID Connect provider written in Go. In Dex 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 by using the xml-roundtrip-validator from Mattermost (see related references).

References

  • nvd.nist.gov/vuln/detail/CVE-2020-26290

Code Behaviors & Features

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Affected versions

All versions before 2.27.0

Fixed versions

  • v2.27.0

Solution

Upgrade to version 2.27.0 or higher.

Impact 9.6 CRITICAL

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

Learn more about CVSS

Weakness

  • CWE-347: Improper Verification of Cryptographic Signature

Source file

go/github.com/dexidp/dex/CVE-2020-26290.yml

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