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Update Protection against IBM AIX ToolTalk RPC Server Remote Buffer Overflow Vulnerability

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Check Point Reference: CPAI-2009-115
Date Published:
Severity:
Last Updated:
Source: RISE-2009001
Protection Provided by: Security Gateway
  • R70
IPS-1
  • IPS-1
  • IPS-1 NGX R65
Who is Vulnerable?
IBM AIX Version 6.1.3
IBM AIX Version 6.1.2
IBM AIX Version 6.1.1
IBM AIX Version 6.1.0
IBM AIX Version 5.3.10
IBM AIX Version 5.3.9
IBM AIX Version 5.3.8
IBM AIX Version 5.3.7
IBM AIX Version 5.3.0
IBM AIX Version 5.2.0
IBM AIX Version 5.1.0
Vulnerability Description
A buffer overflow vulnerability has been discovered in IBM AIX ToolTalk RPC Server. ToolTalk is an inter-application communications system developed by Sun Microsystems in order to allow applications to communicate with each other at runtime. The ToolTalk service is designed to facilitate the development of inter-operating applications that serve individuals and work groups. A remote attacker may exploit this issue to compromise an affected system.
Update/Patch Available
Apply fixes:
IBM
Vulnerability Details
The vulnerability is due to a stack-based buffer overflow in the function _tt_internal_realpath() that fails to properly validate user supplied data when copying it to a stack-based buffer using strcpy(). A remote attacker could trigger this issue by calling a remote procedure of ToolTalk database server with an overly large string as its argument. Successful exploitation may allow the attacker to execute arbitrary code as the root user.

Protection Overview
This protection will detect and block attempts to exploit this vulnerability.

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, Protection tab and select the version of your choice.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R70

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > Application Intelligence > SUN-RPC.
2. In the right pane, double-click the IBM AIX ToolTalk RPC Server Remote Buffer Overflow protection.
3. In the Protection Details window, click on Edit. Choose the protection's Action (Override IPS Policy with: Prevent/Detect), and apply Additional Settings.
4. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:

Attack Name: SUN-RPC Enforcement Protection
Attack Information: IBM AIX ToolTalk RPC server remote buffer overflow

IPS-1 & IPS-1 NGX R65

How Can I Protect My Network?
1. In the IPS-1 Policy Manager, click on the Protection tab.
2. In the Protection tree, click Application Intelligence > RPC, and select the ttdb protection group.
3. Click RPC ttdb overflow (IPS-1 NGX R65 only).
4. In the configuration pane, under Settings, check Active.
5. Click on Install Policy.

How Do I Know if My Network is Under Attack?
Upon attack, the following entries will be logged:

Alert Name: Ttdb
Description: RPC ttdb overflow