Ubuntu 23.04: USN-6217-1 Critical Dotnet Account Bypass Threat

ubuntu

July 11, 2023

The maximum failed attempts security feature for .NET could be bypassed.

Summary

The maximum failed attempts security feature for .NET could be bypassed.

Software Description:

- dotnet6: dotNET CLI tools and runtime

- dotnet7: dotNET CLI tools and runtime

Details:

McKee-Harris, Matt Cotterell, and Jack Moran discovered that .NET did

not properly update account lockout maximum failed attempts. An

attacker could possibly use this issue to bypass the security feature

and attempt to guess more passwords for an account.

Topics Covered

security advisory update instructions ubuntu dotnet breach failed attempts

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.04:
   aspnetcore-runtime-6.0  6.0.120-0ubuntu1~23.04.1
   aspnetcore-runtime-7.0  7.0.109-0ubuntu1~23.04.1
   dotnet-host     6.0.120-0ubuntu1~23.04.1
   dotnet-host-7.0   7.0.109-0ubuntu1~23.04.1
   dotnet-hostfxr-6.0 6.0.120-0ubuntu1~23.04.1
   dotnet-hostfxr-7.0 7.0.109-0ubuntu1~23.04.1
   dotnet-runtime-6.0  6.0.120-0ubuntu1~23.04.1
   dotnet-runtime-7.0  7.0.109-0ubuntu1~23.04.1
   dotnet-sdk-6.0  6.0.120-0ubuntu1~23.04.1
   dotnet-sdk-7.0  7.0.109-0ubuntu1~23.04.1
   dotnet6       6.0.120-0ubuntu1~23.04.1
   dotnet7       7.0.109-0ubuntu1~23.04.1

Ubuntu 22.10:
   aspnetcore-runtime-6.0  6.0.120-0ubuntu1~22.10.1
   aspnetcore-runtime-7.0  7.0.109-0ubuntu1~22.10.1
   dotnet-host     6.0.120-0ubuntu1~22.10.1
   dotnet-host-7.0   7.0.109-0ubuntu1~22.10.1
   dotnet-hostfxr-6.0 6.0.120-0ubuntu1~22.10.1
   dotnet-hostfxr-7.0 7.0.109-0ubuntu1~22.10.1
   dotnet-runtime-6.0  6.0.120-0ubuntu1~22.10.1
   dotnet-runtime-7.0  7.0.109-0ubuntu1~22.10.1
   dotnet-sdk-6.0  6.0.120-0ubuntu1~22.10.1
   dotnet-sdk-7.0  7.0.109-0ubuntu1~22.10.1
   dotnet6       6.0.120-0ubuntu1~22.10.1
   dotnet7       7.0.109-0ubuntu1~22.10.1

Ubuntu 22.04 LTS:
   aspnetcore-runtime-6.0  6.0.120-0ubuntu1~22.04.1
   aspnetcore-runtime-7.0  7.0.109-0ubuntu1~22.04.1
   dotnet-host     6.0.120-0ubuntu1~22.04.1
   dotnet-host-7.0   7.0.109-0ubuntu1~22.04.1
   dotnet-hostfxr-6.0 6.0.120-0ubuntu1~22.04.1
   dotnet-hostfxr-7.0 7.0.109-0ubuntu1~22.04.1
   dotnet-runtime-6.0  6.0.120-0ubuntu1~22.04.1
   dotnet-runtime-7.0  7.0.109-0ubuntu1~22.04.1
   dotnet-sdk-6.0  6.0.120-0ubuntu1~22.04.1
   dotnet-sdk-7.0  7.0.109-0ubuntu1~22.04.1
   dotnet6 6.0.120-0ubuntu1~22.04.1
   dotnet7       7.0.109-0ubuntu1~22.04.1

In general, a standard system update will make all the necessary changes.