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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.037 (89.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000
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
- www.openwall.com/lists/oss-security/2020/06/01/4 (mailing-list, Mailing List, Third Party Advisory)
- groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion (mailing-list, Mailing List, Third Party Advisory)
- github.com/kubernetes/kubernetes/issues/91542 (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.netapp.com/advisory/ntap-20200724-0005/ (Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/05/04/8 (mailing-list, 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.