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.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2021-02-26T01:45:23

Updated: 2024-08-03T18:09:15.396Z

Reserved: 2020-12-22T00:00:00

Link: CVE-2021-21328

cve-icon Vulnrichment

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cve-icon NVD

Status : Analyzed

Published: 2021-02-26T02:15:12.713

Modified: 2021-03-05T19:38:57.617

Link: CVE-2021-21328

cve-icon Redhat

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