Re: Query regarding S4U2Self protocol extension

2021-07-28 Thread Isaac Boukris
On Wed, Jul 28, 2021 at 11:10 AM Vipul Mehta wrote: > > I have windows server 2012 R2 with all the security updates installed and did > some tests: > > Resource Based Constrained Delegation configured for Service A in Service B > account. > > Case 1) Service A : trustedToAuthForDelegation = fal

Re: Query regarding S4U2Self protocol extension

2021-07-28 Thread Isaac Boukris
On Wed, Jul 28, 2021 at 1:46 PM Vipul Mehta wrote: > > Now we know that behavior is unified and S4U2Self ticket should be > forwardable to avoid vulnerability, i think we can add a check in MIT > Kerberos API itself such that before sending S4U2Proxy TGS-REQ to KDC, if > ticket is not forwardab

Re: Query regarding S4U2Self protocol extension

2021-07-28 Thread Vipul Mehta
Now we know that behavior is unified and S4U2Self ticket should be forwardable to avoid vulnerability, i think we can add a check in MIT Kerberos API itself such that before sending S4U2Proxy TGS-REQ to KDC, if ticket is not forwardable it will fail in client itself. I can see that JDK has this ch

Re: Query regarding S4U2Self protocol extension

2021-07-28 Thread Vipul Mehta
I have windows server 2012 R2 with all the security updates installed and did some tests: Resource Based Constrained Delegation configured for Service A in Service B account. Case 1) Service A : trustedToAuthForDelegation = false and non-empty msds-AllowedToDelegateTo -> S42U2Self ticket didn't