SSRF in Kubernetes
CVE-2020-8555
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 are 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).
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.037 (88.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Kubernetes — versions 1.18.0, 1.1, 1.2
- Fedoraproject Fedora — versions 32
Weakness classification (CWE)
Public proof-of-concept exploits
- 43622283/awesome-cloud-native-security
- ARPSyndicate/cvemon
- Live-Hack-CVE/CVE-2020-8555
- LouisLiuNova/container-escape-exploits
- Metarget/awesome-cloud-native-security
- Metarget/metarget
- SunWeb3Sec/Kubernetes-security
- adavarski/HomeLab-Proxmox-k8s-DevSecOps-playground
- adavarski/HomeLab-k8s-DevSecOps-playground
- atesemre/awesome-cloud-native-security
References
- jordan@liggitt.net (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- jordan@liggitt.net (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- jordan@liggitt.net (x_refsource_CONFIRM, Third Party Advisory)
- jordan@liggitt.net (x_refsource_FEDORA, vendor-advisory)
- jordan@liggitt.net (x_refsource_CONFIRM, Third Party Advisory)
- jordan@liggitt.net (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8555?
- CVE-2020-8555 is a medium-severity vulnerability in Kubernetes, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.3/10. Published 2020-06-05.
- How severe is CVE-2020-8555?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2020-8555 known to be exploited?
- 20 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.