We have received information about potential active reconnaissance for TCP 4786 which might be related to CVE-2016-6385 (Cisco IOS and IOS XE Software Smart Install Memory Leak Vulnerability) an advisory released 28 Sep 2016. This vulnerability could allow an unauthenticated user to cause a memory leak that could lead to a Denial of Service (DoS). If you are using Cisco IOS XE Software, "Cisco has released free software updates that address the vulnerability described in this advisory."
So far we have very little information but this is the type of IOS activity you should be looking for:
Oct 21 20:12:46 MDT: %SM-4-BADEVENT: Event 'ibcs_e_download_msg_req_recv' is invalid for the current state 'ibcs_s_accept': smi_ibc_serv SMI IBCS sm
If you have packets or logs that might help assess if this is related to this vulnerability, use our contact page to send them to us.
Oct 22nd 2016
10 months ago