SCADA IDS Signatures (SIS)

CRITIFENCE® SCADA IDS Signatures Database (SIS)

Crash 1756-ENBT module Attempt

Date Title Author SVE-ID
2016-03-03Crash 1756-ENBT module AttemptRockwell AutomationN/A
Description
This rule was developed by Rockwell Automation in response to vulnerabilities identified in Project Basecamp. Attack: Crash 1756-ENBT module Impact: Crashes the module due to a vulnerability in the CIP stack (ci_ParseSegment function) so other packets can also trigger this flaw. // CIP - Unconnected send // Service: 0xe ( Get Attribute Single) // Class: 0xF5 (TCP/IP) [Others can be possible] unsigned char packetCrashEth[]= "\x00\x00\x00\x00\x20\x00\x02\x00\x00\x00\x00\x00\xb2\x00\x0c\x00" "\x0e\x03\x20\xf5\x24\x01\x10\x43\x24\x01\x10\x43";

Signature

						
							
								
alert tcp any any -> $ENIP_SERVER 44818 (msg:"ROCKWELL Automation ControlLogix Crash 1756-ENBT module (CrashEth)";
 flow:to_server;
 content:"|6f 00|";
 offset:0;
 depth:2;
 content:"|00 00 00 00|";
 distance:22;
 within:4;
 byte_extract:2,2,count,relative,multiplier 4,little;
 content:"|b2 00|";
 distance:0;
 within:count;
 content:"|0e|";
 distance:2;
 within:1;
 content:"|20 f5|";
 distance:1;
 within:2;
 classtype:attempted-admin;
 reference:osvdb,78487;
 reference:secunia,47737;
 sid:1111690;
 rev:1;
)