Re: CVE-2022-0778 - Impact of ECC cipher with valid server ECC certificate

2022-03-27 Thread Vipul Mehta
022 at 12:32:03PM +0530, Vipul Mehta wrote: > > > If we consider ECDHE_ECDSA cipher based TLS handshake, then it is > possible > > that the client can send invalid public session key to the server causing > > the vulnerability. Is this assumption correct ? > > The CVE

CVE-2022-0778 - Impact of ECC cipher with valid server ECC certificate

2022-03-26 Thread Vipul Mehta
Hello, Our server does not consume any certificate from the client. Client authentication or client certificate verification is disabled. Server always has a valid ECC certificate. BN_mod_sqrt() is not used anywhere in the server except by openssl. If we consider ECDHE_ECDSA cipher based TLS