CVE-2021-21328
Vapor Denial of Service Vulnerability
Description
Vapor is a web framework for Swift. In Vapor before version 4.40.1, there is a DoS attack against anyone who Bootstraps a metrics backend for their Vapor app. The following is the attack vector: 1. send unlimited requests against a vapor instance with different paths. this will create unlimited counters and timers, which will eventually drain the system. 2. downstream services might suffer from this attack as well by being spammed with error paths. This has been patched in 4.40.1. The `DefaultResponder` will rewrite any undefined route paths for to `vapor_route_undefined` to avoid unlimited counters.
INFO
Published Date :
Feb. 26, 2021, 2:15 a.m.
Last Modified :
March 5, 2021, 7:38 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
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-2021-21328.
| URL | Resource |
|---|---|
| https://github.com/vapor/vapor/commit/e3aa712508db2854ac0ab905696c65fd88fa7e23 | Patch Third Party Advisory |
| https://github.com/vapor/vapor/releases/tag/4.40.1 | Release Notes Third Party Advisory |
| https://github.com/vapor/vapor/security/advisories/GHSA-gcj9-jj38-hwmc | Third Party Advisory |
| https://vapor.codes/ | Product |
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-2021-21328 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21328 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. 05, 2021
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:L Changed Reference Type https://github.com/vapor/vapor/commit/e3aa712508db2854ac0ab905696c65fd88fa7e23 No Types Assigned https://github.com/vapor/vapor/commit/e3aa712508db2854ac0ab905696c65fd88fa7e23 Patch, Third Party Advisory Changed Reference Type https://github.com/vapor/vapor/releases/tag/4.40.1 No Types Assigned https://github.com/vapor/vapor/releases/tag/4.40.1 Release Notes, Third Party Advisory Changed Reference Type https://github.com/vapor/vapor/security/advisories/GHSA-gcj9-jj38-hwmc No Types Assigned https://github.com/vapor/vapor/security/advisories/GHSA-gcj9-jj38-hwmc Third Party Advisory Changed Reference Type https://vapor.codes/ No Types Assigned https://vapor.codes/ Product Added CPE Configuration OR *cpe:2.3:a:vapor_project:vapor:*:*:*:*:*:swift:*:* versions up to (excluding) 4.40.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21328 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-2021-21328
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.15 }} 0.02%
score
0.51624
percentile