CVE-2017-0062 : Detail

CVE-2017-0062

4.7
/
Medium
A01-Broken Access Control
0.66%V3
Local
2017-03-16
23h00 +00:00
2017-08-15
07h57 +00:00
CVE.org
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CVE Descriptions

The Graphics Device Interface (GDI) in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607 allows remote attackers to obtain sensitive information from process memory via a crafted web site, aka "GDI+ Information Disclosure Vulnerability." This vulnerability is different from those described in CVE-2017-0060 and CVE-2017-0073.

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 4.7 MEDIUM CVSS:3.0/AV:L/AC:H/PR:L/UI:N/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.

Local

A vulnerability exploitable with Local access means that the vulnerable component is not bound to the network stack, and the attacker's path is via read/write/execute capabilities. In some cases, the attacker may be logged in locally in order to exploit the vulnerability, otherwise, she may rely on User Interaction to execute a malicious file.

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.

Low

The attacker is authorized with (i.e. requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.

User Interaction

This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

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 1.9 AV:L/AC:M/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 : 41658

Publication date : 2017-03-19 23h00 +00:00
Author : Google Security Research
EDB Verified : Yes

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1053 We have encountered a crash in the Windows Uniscribe user-mode library, in the USP10!ScriptApplyLogicalWidth function, while trying to display a malformed EMF file: --- (920c.9190): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. eax=001e6fe4 ebx=00000000 ecx=00000007 edx=00000000 esi=00000007 edi=00000007 eip=751e6f3c esp=002ef0c8 ebp=002ef0ec iopl=0 nv up ei pl zr na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010246 USP10!ScriptApplyLogicalWidth+0x10c: 751e6f3c 8b04b8 mov eax,dword ptr [eax+edi*4] ds:002b:001e7000=???????? 0:000> kb ChildEBP RetAddr Args to Child 002ef0ec 751f4039 001e6fe4 0000008f 0000008f USP10!ScriptApplyLogicalWidth+0x10c 002ef140 751f435d 00000105 002ef170 0a6a1cbc USP10!ApplyPiDxToItem+0x89 002ef184 751e7a04 ffffffff 00000004 000000a0 USP10!ScriptStringAnalyzeGlyphs+0x20d 002ef19c 76ca5465 1d011f2d 0a6a1bd8 00001000 USP10!ScriptStringAnalyse+0x284 002ef1e8 76ca3a3d 1d011f2d 0935f000 00001000 LPK!LpkStringAnalyse+0xe5 002ef238 76ca3af2 1d011f2d 00000064 00000064 LPK!InternalTextOut+0x1cd 002ef26c 76ccda50 1d011f2d 00000064 00000064 LPK!LpkExtTextOut+0x32 002ef7d8 76ccda90 1d011f2d 00000064 00000064 GDI32!ExtTextOutInternalA+0x3aa 002ef804 76ce7fed 1d011f2d 00000064 00000064 GDI32!ExtTextOutA+0x24 002ef838 76cd50cd 1d011f2d 04ed8ff8 00000002 GDI32!MREXTTEXTOUT::bPlay+0x7f 002ef8b0 6c85fc37 1d011f2d 04ed8ff8 001e01e8 GDI32!PlayEnhMetaFileRecord+0x2c5 002ef8c8 6c860e3a 00000053 07bdbcb0 00006044 gdiplus!EmfEnumState::PlayRecord+0x3a 002ef8e0 6c83881a 00000053 00006044 001e01f0 gdiplus!EmfEnumState::ProcessRecord+0xb1 002ef8fc 6c8389e0 00000053 00000000 00006044 gdiplus!GdipPlayMetafileRecordCallback+0x6c 002ef924 76cd58a4 1d011f2d 04ed8ff8 001e01f0 gdiplus!EnumEmfDownLevel+0x6e 002ef9b0 6c83abb4 1d011f2d 403581b3 6c838972 GDI32!bInternalPlayEMF+0x6a3 002ef9e8 6c83d317 1d011f2d 924626c1 002efa74 gdiplus!MetafilePlayer::EnumerateEmfRecords+0x104 002efa90 6c83f3c1 00000000 924626c1 002efbd8 gdiplus!GpGraphics::EnumEmf+0x391 002efbf0 6c8448c9 00000000 00000001 00000001 gdiplus!GpMetafile::EnumerateForPlayback+0x5a7 002efcec 6c84494d 07bd5f28 00000000 00000000 gdiplus!GpGraphics::DrawImage+0x3f5 002efd50 6c80e03f 07bd5f28 002efd78 002efd88 gdiplus!GpGraphics::DrawImage+0x51 002efdb8 6c80e0d3 07bd1d28 438f3857 00000000 gdiplus!GdipDrawImage+0x130 002efde4 013e1747 07bd1d28 07bd5f28 00000000 gdiplus!GdipDrawImageI+0x49 [...] --- The issue reproduces on Windows 7. It is easiest to reproduce with PageHeap enabled. In order to reproduce the problem with the provided samples, it might be necessary to use a custom program which displays images using GDI+, or any existing GDI+ client (such as Microsoft Office). Attached is ane EMF file which triggers the crash. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/41658.zip

Products Mentioned

Configuraton 0

Microsoft>>Windows_10 >> Version -

Microsoft>>Windows_10 >> Version 1511

Microsoft>>Windows_10 >> Version 1607

Microsoft>>Windows_7 >> Version *

Microsoft>>Windows_8.1 >> Version *

Microsoft>>Windows_rt_8.1 >> Version *

Microsoft>>Windows_server_2008 >> Version *

Microsoft>>Windows_server_2008 >> Version r2

Microsoft>>Windows_server_2012 >> Version -

Microsoft>>Windows_server_2012 >> Version r2

Microsoft>>Windows_vista >> Version *

References

http://www.securityfocus.com/bid/96715
Tags : vdb-entry, x_refsource_BID
http://www.securitytracker.com/id/1038002
Tags : vdb-entry, x_refsource_SECTRACK
https://www.exploit-db.com/exploits/41658/
Tags : exploit, x_refsource_EXPLOIT-DB