GEN:SID 1:2159
Message MISC BGP invalid type 0
Summary This event is generated when an invalid BGP type is detected.
Impact Unknown.
Detailed Information This event indicates that a Border Gateway Protocol (BGP) packet with an invalid type has been detected.

BGP packets must have a type of 1 or more. This event indicates that a BGP packet was detected with a type of 0. This may be related to another issue regarding invalid BGP datasizes. See sid 2158 for further information.

Note: if sid 2158 has been disabled, this event will be generated if the type of problem described in the documentation for sid 2158 is detected.
Affected Systems This BGP packet may cause problems with TCPDump.
Attack Scenarios An attacker would need to craft a special BGP packet with a type of 0 or a datasize of less than 20 bytes.
Ease of Attack Simple.
Corrective Action Upgrade to the latest non-affected version of the software
Additional References  
Rule References bugtraq: 6213
cve: 2002-1350