CVE-2021-43824
"Envoy Regex JWT Filter Denial of Service Vulnerability"
Description
Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.
INFO
Published Date :
Feb. 22, 2022, 11:15 p.m.
Last Modified :
March 1, 2022, 8:47 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-2021-43824.
| URL | Resource |
|---|---|
| https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a | Patch Third Party Advisory |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p | Issue Tracking 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-2021-43824 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-43824 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 -
Initial Analysis by [email protected]
Mar. 01, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/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/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a No Types Assigned https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a Patch, Third Party Advisory Changed Reference Type https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p No Types Assigned https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p Issue Tracking, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions up to (excluding) 1.18.6 *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions from (including) 1.19.0 up to (excluding) 1.19.3 *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions from (including) 1.20.0 up to (excluding) 1.20.2 *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions from (including) 1.21.0 up to (excluding) 1.21.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-43824 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-2021-43824
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
0.44001
percentile