Описание
Vapor's Metrics integration could cause a system drain
Impact
This is a DoS attack against anyone who Bootstraps a metrics backend for their Vapor app with the following attack vector:
- send unlimited requests against a vapor instance with different paths. this will create “unlimited” counters and timers, which will eventually drain the system.
- downstream services might suffer from this attack as well by being spammed with error paths
Patches
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.
Workarounds
Don't bootstrap a metrics system or upgrade to 4.40.1
For more information
If you have any questions or comments about this advisory:
Ссылки
Пакеты
github.com/vapor/vapor
<= 4.40.0
4.40.1
Связанные уязвимости
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.