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CVE-2020-8555: Server-Side Request Forgery (SSRF)

February 15, 2022 (updated September 18, 2023)

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 is vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master’s host network (such as link-local or loopback services).

References

  • www.openwall.com/lists/oss-security/2020/06/01/4
  • www.openwall.com/lists/oss-security/2021/05/04/8
  • github.com/advisories/GHSA-x6mj-w4jf-jmgw
  • github.com/kubernetes/kubernetes/issues/91542
  • github.com/kubernetes/kubernetes/pull/89794
  • groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
  • nvd.nist.gov/vuln/detail/CVE-2020-8555
  • security.netapp.com/advisory/ntap-20200724-0005/

Code Behaviors & Features

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Affected versions

All versions before 1.15.12, all versions starting from 1.16.0 before 1.16.9, all versions starting from 1.17.0 before 1.17.4, all versions starting from 1.18.0 before 1.18.1

Fixed versions

  • 1.17.4
  • 1.18.1
  • 1.15.12
  • 1.16.9

Solution

Upgrade to versions 1.17.4, 1.18.1, 1.15.12, 1.16.9 or above.

Impact 6.3 MEDIUM

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

Learn more about CVSS

Weakness

  • CWE-918: Server-Side Request Forgery (SSRF)

Source file

go/k8s.io/kubernetes/CVE-2020-8555.yml

Spotted a mistake? Edit the file on GitLab.

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