Check Point Advisories

Linux Kernel iscsi_add_notunderstood_response Heap Buffer Overflow (CVE-2013-2850)

Check Point Reference: CPAI-2013-1906
Date Published: 24 Jun 2013
Severity: Critical
Last Updated: 14 Feb 2016
Source:
Industry Reference:CVE-2013-2850
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable?
Vulnerability Description A heap buffer overflow vulnerability has been reported in the Linux Kernel. The vulnerability is in the iscsi_add_notunderstood_response() function in the iscsi_target driver and is due to the way a notunderstood response is created after processing very long keys. A remote, unauthenticated attacker can exploit this vulnerability by sending an overly long key. A successful attack can result in arbitrary code execution with kernel privileges. An unsuccessful attack will cause the kernel to crash resulting in a denial-of-service condition.

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 iscsi_add_notunderstood_response Heap 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:  Application Servers Protection Violation.
Attack Information:  Linux Kernel iscsi_add_notunderstood_response Heap Buffer Overflow

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