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  5. CVE-2020-27847

CVE-2020-27847: Improper Handling of Syntactically Invalid Structure

May 28, 2021 (updated June 2, 2021)

A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

References

  • bugzilla.redhat.com/show_bug.cgi?id=1907732
  • mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/
  • nvd.nist.gov/vuln/detail/CVE-2020-27847

Code Behaviors & Features

Detect and mitigate CVE-2020-27847 with GitLab Dependency Scanning

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Affected versions

All versions before 2.27.0

Solution

Unfortunately, there is no solution available yet.

Impact 9.8 CRITICAL

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

Learn more about CVSS

Weakness

  • CWE-228: Improper Handling of Syntactically Invalid Structure
  • CWE-290: Authentication Bypass by Spoofing

Source file

go/github.com/dexidp/dex/CVE-2020-27847.yml

Spotted a mistake? Edit the file on GitLab.

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