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Update Protection against Novell ZENworks Configuration Management TFTPD Heap Buffer Overflow Vulnerability

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Check Point Reference: CPAI-2011-071
Date Published:
Severity:
Last Updated:
Source: Secunia Advisory: SA43379
Industry Reference(s): CVE-2010-4323
Protection Provided by: Security Gateway
  • R75
IPS-1
  • IPS-1
  • IPS-1 NGX R65
Who is Vulnerable?
Novell ZENworks Configuration Management 10.x
Novell ZENworks Configuration Management 11.x
Vulnerability Description
A remote code execution vulnerability has been reported in Novell ZENworks Configuration Management. Novell ZENworks Configuration Management is an IT desktop computer management suite that is based on a client/server architecture. A management server collects and sends data of managed assets by communicating with client applications installed on computers, or via other management protocols. An attacker may exploit this issue to execute arbitrary code on a vulnerable system.
Update/Patch Available
The vendor, Novell, has released an advisory addressing this vulnerability.
Vulnerability Details
The vulnerability is due to a boundary error in the TFTPD service while parsing crafted client requests. A remote attacker could exploit this issue by sending a crafted packet to the affected server. Successful exploitation of this vulnerability will allow an attacker to execute arbitrary code on the vulnerable system.

Protection Overview
This protection will detect and block crafted packets sent to the vulnerable server.

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 taband 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: R75

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > IPS Software Blade > Application Intelligence > Application Servers.
2. In the right pane, double-click the Novell ZENworks Configuration Management TFTPD Heap 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: Application Servers Protection Violation
Attack Information: Novell ZENworks Configuration Management TFTPD heap 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 > TFTP, and select the TFTP Attacks protection group
  3. Click TFTP message is too long (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: TFTP Attack Monitor
Description: TFTP message is too long