Check Point Advisories

Linux Kernel nfsd CAP_MKNOD Security Bypass - Ver2 (CVE-2009-1072)

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0376
Date Published:	26 Mar 2015
Severity:	High
Last Updated:	Thursday 26 March, 2015
Source:
Industry Reference:	CVE-2009-1072
Protection Provided by:	Security Gateway R77, R76, 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 kernel supports a great number of features, including networking, file system, graphics protocols and standards. A security bypass vulnerability exists in Linux kernel. The vulnerability is due to an insecure design in Linux kernel when handling the NFS request, MKNOD. By sending a crafted NFS MKNOD request to a target system, a remote attacker can leverage this vulnerability to create a device on a target system. Successful exploitation of this vulnerability can allow a remote attacker to create a device on a target system, allowing for further compromise on the vulnerable system.

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.

Security Gateway R77 / R76 / R75 / R71 / R70

In the IPS tab, click Protections and find the Linux Kernel nfsd CAP_MKNOD Security Bypass - Ver2 protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:

Attack Name: NFS Protection Violation.
Attack Information: Linux Kernel nfsd CAP_MKNOD Security Bypass - Ver2