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  5. CVE-2020-27846

CVE-2020-27846: Misinterpretation of Input

June 23, 2021 (updated February 7, 2023)

A signature verification vulnerability exists in crewjam/saml. 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=1907670
  • github.com/advisories/GHSA-4hq8-gmxx-h6w9
  • github.com/crewjam/saml/commit/da4f1a0612c0a8dd0452cf8b3c7a6518f6b4d053
  • github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9
  • grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/
  • mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/
  • nvd.nist.gov/vuln/detail/CVE-2020-27846
  • pkg.go.dev/vuln/GO-2021-0058
  • security.netapp.com/advisory/ntap-20210205-0002/

Code Behaviors & Features

Detect and mitigate CVE-2020-27846 with GitLab Dependency Scanning

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Affected versions

All versions before 0.4.3

Fixed versions

  • v0.4.3

Solution

Upgrade to version 0.4.3 or above.

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-115: Misinterpretation of Input
  • CWE-707: Improper Neutralization

Source file

go/github.com/crewjam/saml/samlidp/CVE-2020-27846.yml

Spotted a mistake? Edit the file on GitLab.

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