CVE-2021-21328

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Summary

CVECVE-2021-21328
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-02-26 02:15:00 UTC
Updated2021-03-05 19:38:00 UTC
DescriptionVapor 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.

Risk And Classification

Problem Types: CWE-400

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Vapor Project Vapor All All All All
Application Vapor Project Vapor All All All All

References

ReferenceSourceLinkTags
Vapor (Web Framework for Swift) MISC vapor.codes Product
Merge pull request from GHSA-gcj9-jj38-hwmc · vapor/vapor@e3aa712 · GitHub MISC github.com Patch, Third Party Advisory
Release Rewrite metrics path and method to undefined for unknown routes · vapor/vapor · GitHub MISC github.com Release Notes, Third Party Advisory
Vapor's Metrics integration could cause a system drain · Advisory · vapor/vapor · GitHub CONFIRM github.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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