Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

SignalR's MessagePack protocol can consume excessive memory while deserializing deeply nested attacker-controlled arrays, resulting in unauthenticated remote denial of service.

CNA: microsoft
CNA impact: Denial of Service
CWE: TBD
Platforms: all
Architectures: all
CVSS 3.1: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected packages:
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack (release 10.0): 10.0.0 - 10.0.12; fixed 10.0.13 [aspnetcore@0ef4bbf]
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack (release 8.0): 8.0.0 - 8.0.31; fixed 8.0.32 [aspnetcore@21f2be2]
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack (release 9.0): 9.0.0 - 9.0.20; fixed 9.0.21 [aspnetcore@a0f453f]
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack (release 11.0): 11.0.0-preview.5 - 11.0.0-rc.1; fixed 11.0.0-rc.2 [aspnetcore@f0abafb]

Fix commits:
- dotnet/aspnetcore (release/10.0): https://github.com/dotnet/aspnetcore/commit/0ef4bbfa3291b306a21e5001cb0491277bdd35bc
- dotnet/aspnetcore (release/8.0): https://github.com/dotnet/aspnetcore/commit/21f2be26fd214186afe5a4f75332f4ee64130700
- dotnet/aspnetcore (release/9.0): https://github.com/dotnet/aspnetcore/commit/a0f453fb54e3bea486ff0d27606bd0e579d71c88
- dotnet/aspnetcore (release/11.0): https://github.com/dotnet/aspnetcore/commit/f0abafbf4c64be4c8bbccda5b3ed80d8fc771ac2