CVE-2020-15127
Contour Envoy Remote Shutdown Remote Command Execution
Description
In Contour ( Ingress controller for Kubernetes) before version 1.7.0, a bad actor can shut down all instances of Envoy, essentially killing the entire ingress data plane. GET requests to /shutdown on port 8090 of the Envoy pod initiate Envoy's shutdown procedure. The shutdown procedure includes flipping the readiness endpoint to false, which removes Envoy from the routing pool. When running Envoy (For example on the host network, pod spec hostNetwork=true), the shutdown manager's endpoint is accessible to anyone on the network that can reach the Kubernetes node that's running Envoy. There is no authentication in place that prevents a rogue actor on the network from shutting down Envoy via the shutdown manager endpoint. Successful exploitation of this issue will lead to bad actors shutting down all instances of Envoy, essentially killing the entire ingress data plane. This is fixed in version 1.7.0.
INFO
Published Date :
Aug. 5, 2020, 9:15 p.m.
Last Modified :
Aug. 12, 2020, 1:30 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
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-2020-15127.
| URL | Resource |
|---|---|
| https://github.com/projectcontour/contour/releases/tag/v1.7.0 | Release Notes Third Party Advisory |
| https://github.com/projectcontour/contour/security/advisories/GHSA-mjp8-x484-pm3r | Patch 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-15127 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-15127 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.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Aug. 12, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/projectcontour/contour/releases/tag/v1.7.0 No Types Assigned https://github.com/projectcontour/contour/releases/tag/v1.7.0 Release Notes, Third Party Advisory Changed Reference Type https://github.com/projectcontour/contour/security/advisories/GHSA-mjp8-x484-pm3r No Types Assigned https://github.com/projectcontour/contour/security/advisories/GHSA-mjp8-x484-pm3r Patch, Third Party Advisory Added CWE NIST CWE-306 Added CPE Configuration OR *cpe:2.3:a:projectcontour:contour:*:*:*:*:*:kubernetes:*:* versions up to (excluding) 1.7.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-15127 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-2020-15127
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.01%
score
0.41491
percentile