Apply upstream fix for CVE-2016-8858:

Unregister the KEXINIT handler after message has been received.
  Otherwise an unauthenticated peer can repeat the KEXINIT and cause
  allocation of up to 128MB -- until the connection is closed.
  Reported by shilei-c at 360.cn

Obtained from:	OpenBSD

This commit is contained in:

Xin LI

2016-11-02 06:43:20 +00:00

parent b5a1df4a77

commit 642a1c3843

1 changed files with 1 additions and 0 deletions

									
										kex.c
									
		+1
		
												View File
												
				@@ -468,6 +468,7 @@ kex_input_kexinit(int type, u_int32_t seq, void *ctxt)

					if (kex == NULL)

						return SSH_ERR_INVALID_ARGUMENT;

					ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, NULL);

					ptr = sshpkt_ptr(ssh, &dlen);

					if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0)

						return r;