CVE-2020-8557
Kubernetes Kubelet Insufficient Ephemeral Storage Handling Vulnerability
Description
The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.
INFO
Published Date :
July 23, 2020, 5:15 p.m.
Last Modified :
Jan. 27, 2023, 8:35 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2020-8557 has a 8 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-8557.
| URL | Resource |
|---|---|
| https://github.com/kubernetes/kubernetes/issues/93032 | Issue Tracking Patch Third Party Advisory |
| https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ | Mailing List Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20200821-0002/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Certified Kubernetes Security Specialist (CKS) 2023-2024
cks cks-exam cks-exam-preparation ckss
Jinja Shell
None
AGS Script Jinja
None
Shell Python
⚙ DevSecOps Kubernetes Playground ("A Hacker's Guide to Kubernetes")
Dockerfile Shell Ruby Smarty Jinja HCL
Metarget is a framework providing automatic constructions of vulnerable infrastructures.
cloud-native kubernetes container cloud-native-security kubernetes-security container-security container-escape target vulnerable-infrastructure vulnerabilities vulnerable-scenes vulnerable-infrastructures privilege-escalation kernel-exploitation
Python Shell HTML JavaScript PHP Perl Dockerfile C
:atom: [WIP] 整理过去的分享，从零开始的Kubernetes攻防 🧐
blackhat hitbsecconf hitb cis cloud-native containers k8s kubernetes
Shell Python
None
Curated resources help you prepare for the CNCF/Linux Foundation CKS 2021 "Kubernetes Certified Security Specialist" Certification exam. Please provide feedback or requests by raising issues, or making a pull request. All feedback for improvements are welcome. thank you.
kubernetes-security kubernetes cks ckss kernel-hardening exam-objectives os-footprint security seccomp apparmor falco kube-hunter kube-bench trivy pod certification policy mitre-attack pod-security-policy open-policy-agent
AGS Script Jinja
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-8557 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-8557 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Jan. 27, 2023
Action Type Old Value New Value Changed Reference Type https://github.com/kubernetes/kubernetes/issues/93032 Patch, Third Party Advisory https://github.com/kubernetes/kubernetes/issues/93032 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20200821-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20200821-0002/ Third Party Advisory -
CVE Modified by [email protected]
Aug. 21, 2020
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20200821-0002/ [No Types Assigned] -
Initial Analysis by [email protected]
Jul. 28, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/kubernetes/kubernetes/issues/93032 No Types Assigned https://github.com/kubernetes/kubernetes/issues/93032 Patch, Third Party Advisory Changed Reference Type https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ No Types Assigned https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ Mailing List, Third Party Advisory Added CWE NIST CWE-400 Added CPE Configuration OR *cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* versions up to (excluding) 1.16.13 *cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* versions from (including) 1.17.0 up to (excluding) 1.17.9 *cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* versions from (including) 1.18.0 up to (excluding) 1.18.6
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-8557 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-8557
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.10264
percentile