Check Point Advisories

Sybase Open Server Null Byte Stack Memory Corruption

Check Point Reference: CPAI-2011-488
Date Published: 1 Nov 2011
Severity: Critical
Last Updated: Tuesday 13 December, 2011
Source:
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description A remote code execution vulnerability has been reported in Sybase Open Server. The vulnerability is due to an error in the processing of malformed login packets by the server. A remote attacker may exploit this vulnerability by sending a specially crafted packet to an affected Sybase server. Successful exploitation would allow an attacker to execute arbitrary code in the security context of the affected service.

Protection Overview

This protection will detect and block crafted login requests sent to the 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, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Sybase Open Server Null Byte Stack Memory Corruption protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  Sybase Open Server null byte stack memory corruption

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