|Check Point Reference:||CPAI-2005-136|
|Date Published:||9 Oct 2005|
|Last Updated:||27 Sep 2015|
|Protection Provided by:||
|Who is Vulnerable?|
|Vulnerability Description||DCE/RPC stands for Distributed Computing Environment / Remote Procedure Calls. It is a Remote Procedure Call system that allows software to work across multiple computers, as if it were all working on the same computer. This system allows programmers to write distributed software without having to worry about the underlying network code.There are many known vulnerabilities in applications based on the DCE-RPC protocol. Though IDS and IPS devices have signatures to detect attacks exploiting these vulnerabilities, these devices can be evaded by using an invalid value in the NDR field. Attackers may use this as an IDS/IPS evasion technique.|
By enabling the Block Fragmented Bind Request protection, IPS will block fragmented Bind requests. By enabling the Block Multiple Context Bind protection, IPS will block requests with more than one context item.The detect mode makes it possible to track such attempts without blocking them.
In order for the protection to be activated, update your Security Gateway product to the latest IPS update.For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.
This protection's log will contain the following information:
Attack Name: DCE-RPC Enforcement Violation.
Attack Information: Unallowed number of context items in Bind/Alter context reques