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Disallow extra kexinit messages

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--HG--
branch : fuzz
This commit is contained in:
Matt Johnston 2020-10-18 22:17:54 +08:00
parent 33eba22966
commit 5567c238a7
1 changed files with 6 additions and 0 deletions
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6
common-kex.c
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@ -487,6 +487,12 @@ void recv_msg_kexinit() {
TRACE(("continue recv_msg_kexinit: sent kexinit"))
}
/* "Once a party has sent a SSH_MSG_KEXINIT message ...
further SSH_MSG_KEXINIT messages MUST NOT be sent" */
if (ses.kexstate.recvkexinit) {
dropbear_exit("Unexpected KEXINIT");
}
/* start the kex hash */
local_ident_len = strlen(LOCAL_IDENT);
remote_ident_len = strlen(ses.remoteident);