Check Point Advisories

Linux Kernel SCTP FWD-TSN Handling Buffer Overflow (CVE-2009-0065)

Check Point Reference: CPAI-2009-467
Date Published: 2 Mar 2010
Severity: Critical
Last Updated: Tuesday 02 March, 2010
Source:
Industry Reference:CVE-2009-0065
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Linux is a popular open-source operating system in which the kernel and other programs related to the operating systems are developed by a group of volunteers. The Linux network protocol stack provides support for Stream Control Transmission Protocol (SCTP) in addition to more popular transport protocols like TCP and UDP. A buffer overflow vulnerability exists in SCTP module of Linux Kernel. The vulnerability occurs due to insufficient boundary checks during processing of SCTP packets. By sending a crafted SCTP packet to a target host, an attacker may exploit this vulnerability to compromise Linux Kernel. In an attack case where code injection is successful, the behavior of the target is entirely dependent on the intended function of the injected code. The code in such a case would execute within the security context of kernel-level privileges. An attack case where code injection is unsuccessful may cause a kernel panic condition on the target system. The kernel will log a panic message on the system console containing debug information pertaining to the panic condition which includes the call trace, register values and so on. The target host must be restarted to resume its functionality.

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, 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 Linux Kernel SCTP FWD-TSN Handling Buffer Overflow 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:  ICMP Protocol Violation.
Attack Information:  Linux Kernel SCTP FWD-TSN handling buffer overflow

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