CVE-2021-25736
Kube-Proxy Windows LoadBalancer Trafficking Bug
Description
Kube-proxy on Windows can unintentionally forward traffic to local processes listening on the same port (“spec.ports[*].port”) as a LoadBalancer Service when the LoadBalancer controller does not set the “status.loadBalancer.ingress[].ip” field. Clusters where the LoadBalancer controller sets the “status.loadBalancer.ingress[].ip” field are unaffected.
INFO
Published Date :
Oct. 30, 2023, 3:15 a.m.
Last Modified :
Dec. 21, 2023, 10:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2021-25736 has a 1 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-2021-25736.
| URL | Resource |
|---|---|
| https://github.com/kubernetes/kubernetes/pull/99958 | Third Party Advisory |
| https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ | Mailing List Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20231221-0003/ |
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).
⚙ DevSecOps Kubernetes Playground ("A Hacker's Guide to Kubernetes")
Dockerfile Shell Ruby Smarty Jinja HCL
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-25736 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-25736 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 -
CVE Modified by [email protected]
Dec. 21, 2023
Action Type Old Value New Value Added Reference Kubernetes https://security.netapp.com/advisory/ntap-20231221-0003/ [No types assigned] -
Initial Analysis by [email protected]
Nov. 16, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N Changed Reference Type https://github.com/kubernetes/kubernetes/pull/99958 No Types Assigned https://github.com/kubernetes/kubernetes/pull/99958 Third Party Advisory Changed Reference Type https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ No Types Assigned https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ Mailing List, Third Party Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration AND OR *cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* versions from (including) 1.18.0 up to (excluding) 1.18.18 *cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* versions from (including) 1.19.0 up to (excluding) 1.19.10 *cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* versions from (including) 1.20.0 up to (excluding) 1.20.6 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-25736 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-2021-25736
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} 0.05%
score
0.47949
percentile