CVE-2019-1346 : Détail

CVE-2019-1346

6.5
/
Moyen
Overflow
3.76%V3
Network
2019-10-10
11h28 +00:00
2019-10-10
14h06 +00:00
CVE.org
NVD
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Descriptions du CVE

A denial of service vulnerability exists when Windows improperly handles objects in memory, aka 'Windows Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-1343, CVE-2019-1347.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-125 Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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

The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).

Attack Complexity

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

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

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 of the vulnerable system to carry out an attack.

User Interaction

This metric captures the requirement for a human 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

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Unchanged

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

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

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.

None

There is no loss of confidentiality within the impacted component.

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.

High

There is a 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 in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.

 [email protected]
V2 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C [email protected]

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 : 47488

Date de publication : 2019-10-09 22h00 +00:00
Auteur : Google Security Research
EDB Vérifié : Yes

We have encountered a Windows kernel crash in CI!HashKComputeFirstPageHash while trying to load a malformed PE image into the process address space as a data file (i.e. LoadLibraryEx(LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_IMAGE_RESOURCE)). An example crash log generated after triggering the bug is shown below: --- cut --- *** Fatal System Error: 0x00000050 (0xFFFFF80068F02000,0x0000000000000000,0xFFFFF80067291A2C,0x0000000000000000) Driver at fault: *** CI.dll - Address FFFFF80067291A2C base at FFFFF80067230000, DateStamp 8581dc0d . Break instruction exception - code 80000003 (first chance) A fatal system error has occurred. Debugger entered on first try; Bugcheck callbacks have not been invoked. A fatal system error has occurred. [...] ******************************************************************************* * * * Bugcheck Analysis * * * ******************************************************************************* PAGE_FAULT_IN_NONPAGED_AREA (50) Invalid system memory was referenced. This cannot be protected by try-except. Typically the address is just plain bad or it is pointing at freed memory. Arguments: Arg1: fffff80068f02000, memory referenced. Arg2: 0000000000000000, value 0 = read operation, 1 = write operation. Arg3: fffff80067291a2c, If non-zero, the instruction address which referenced the bad memory address. Arg4: 0000000000000000, (reserved) [...] TRAP_FRAME: ffffe20f4b7d6400 -- (.trap 0xffffe20f4b7d6400) NOTE: The trap frame does not contain all registers. Some register values may be zeroed or incorrect. rax=00000000000000c8 rbx=0000000000000000 rcx=144670b8d60e0000 rdx=0000000000000000 rsi=0000000000000000 rdi=0000000000000000 rip=fffff80067291a2c rsp=ffffe20f4b7d6590 rbp=ffffe20f4b7d6690 r8=00000000fffffe00 r9=fffff80068ef0000 r10=0000000000000002 r11=ffffe20f4b7d6760 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000 iopl=0 nv up ei pl nz na pe nc CI!HashKComputeFirstPageHash+0x1f4: fffff800`67291a2c 418b5dd4 mov ebx,dword ptr [r13-2Ch] ds:ffffffff`ffffffd4=???????? Resetting default scope LAST_CONTROL_TRANSFER: from fffff80065aa6642 to fffff800659c46a0 STACK_TEXT: ffffe20f`4b7d59b8 fffff800`65aa6642 : fffff800`68f02000 00000000`00000003 ffffe20f`4b7d5b20 fffff800`65922be0 : nt!DbgBreakPointWithStatus ffffe20f`4b7d59c0 fffff800`65aa5d32 : fffff800`00000003 ffffe20f`4b7d5b20 fffff800`659d0fb0 ffffe20f`4b7d6060 : nt!KiBugCheckDebugBreak+0x12 ffffe20f`4b7d5a20 fffff800`659bca07 : ffff8bc5`e2f17f80 fffff800`65ad0110 00000000`00000000 fffff800`65c63900 : nt!KeBugCheck2+0x952 ffffe20f`4b7d6120 fffff800`659e0161 : 00000000`00000050 fffff800`68f02000 00000000`00000000 ffffe20f`4b7d6400 : nt!KeBugCheckEx+0x107 ffffe20f`4b7d6160 fffff800`6587aaef : fffffb00`023b21b0 00000000`00000000 00000000`00000000 fffff800`68f02000 : nt!MiSystemFault+0x1d3171 ffffe20f`4b7d6260 fffff800`659ca920 : ffffe20f`4b7d6860 00000000`00000000 00000000`00000200 fffff800`65c651c0 : nt!MmAccessFault+0x34f ffffe20f`4b7d6400 fffff800`67291a2c : 00000000`00000000 ffffe20f`4b7d6690 00000000`00000000 00000000`00001000 : nt!KiPageFault+0x360 ffffe20f`4b7d6590 fffff800`67280829 : 00000000`00000000 ffffce0d`8ae71003 ffffac8f`23a2a9e8 00000000`00000000 : CI!HashKComputeFirstPageHash+0x1f4 ffffe20f`4b7d67c0 fffff800`6727f10d : ffffac8f`23a2a5a0 ffffce0d`8ae71080 ffffce0d`00000000 00000000`00000000 : CI!CipGetEmbeddedSignatureAndFindFirstMatch+0x181 ffffe20f`4b7d6860 fffff800`6727e89a : ffffac8f`23a2a5a0 ffffce0d`8b7e1d50 ffffce0d`8ae71080 fffff800`68ef0000 : CI!CipValidatePageHash+0xfd ffffe20f`4b7d6950 fffff800`6727cc8b : fffff800`6727f010 ffffe20f`4b7d6c8c ffffce0d`8b7e1d50 ffffce0d`8ae71080 : CI!CipValidateImageHash+0xe6 ffffe20f`4b7d6a30 fffff800`65e85766 : ffffe20f`4b7d6c70 fffff800`68ef0000 00000000`0000000e fffff800`68ef0000 : CI!CiValidateImageHeader+0x68b ffffe20f`4b7d6bb0 fffff800`65e8528a : 00000000`00000000 00000000`00000001 00000000`00000000 00000000`00012000 : nt!SeValidateImageHeader+0xd6 ffffe20f`4b7d6c60 fffff800`65e1e0da : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!MiValidateSectionCreate+0x436 ffffe20f`4b7d6e50 fffff800`65dfc861 : ffffe20f`4b7d7180 ffffe20f`4b7d6fb0 00000000`40000000 ffffe20f`4b7d7180 : nt!MiValidateSectionSigningPolicy+0xa6 ffffe20f`4b7d6eb0 fffff800`65ddca20 : ffffce0d`8b7e1d50 ffffe20f`4b7d7180 ffffe20f`4b7d7180 ffffce0d`8b7e1d20 : nt!MiCreateNewSection+0x5ad ffffe20f`4b7d7010 fffff800`65ddcd24 : ffffe20f`4b7d7040 ffffac8f`2af6a9f0 ffffce0d`8b7e1d50 00000000`00000000 : nt!MiCreateImageOrDataSection+0x2d0 ffffe20f`4b7d7100 fffff800`65ddc37f : 00000000`11000000 ffffe20f`4b7d74c0 00000000`00000001 00000000`00000002 : nt!MiCreateSection+0xf4 ffffe20f`4b7d7280 fffff800`65ddc110 : 00000010`0e3f8dc8 00000000`00000005 00000000`00000000 00000000`00000001 : nt!MiCreateSectionCommon+0x1ff ffffe20f`4b7d7360 fffff800`659ce115 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!NtCreateSection+0x60 ffffe20f`4b7d73d0 00007ffe`c317c9a4 : 00007ffe`c0511ae7 00000000`00000000 00000000`00000001 40b28496`f324e4f9 : nt!KiSystemServiceCopyEnd+0x25 00000010`0e3f8d58 00007ffe`c0511ae7 : 00000000`00000000 00000000`00000001 40b28496`f324e4f9 feafc9c1`1796ffa1 : ntdll!NtCreateSection+0x14 00000010`0e3f8d60 00007ffe`c0515640 : 00000129`5f442be0 0000001b`00000000 00007ffe`c1f72770 00000000`00000022 : KERNELBASE!BasepLoadLibraryAsDataFileInternal+0x2e7 00000010`0e3f8f90 00007ffe`c04fc41d : 00000129`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : KERNELBASE!LoadLibraryExW+0xe0 00000010`0e3f9000 00007ffe`c16903d1 : 00000129`5f414f00 00000000`00000000 00000129`5f443840 00007ffe`c16a6d85 : KERNELBASE!GetFileVersionInfoSizeExW+0x3d 00000010`0e3f9060 00007ffe`c169035c : 00000000`00000000 00007ffe`c08710ff 00000129`5f414f00 00000010`0e3f93b0 : shell32!_LoadVersionInfo+0x39 00000010`0e3f90d0 00007ffe`c08ec1c1 : 00000000`00000000 00000000`00000000 ffffffff`fffffffe 00000000`00000000 : shell32!CVersionPropertyStore::Initialize+0x2c [...] --- cut --- We have minimized one of the crashing samples down to a 3-byte difference in relation to the original file: one which decreases NumberOfSections from 4 to 3, one which increases SizeOfOptionalHeader from 0xF0 to 0xCEF0, and one which changes DllCharacteristics from 0 to 0x00FF (IMAGE_DLLCHARACTERISTICS_FORCE_INTEGRITY | IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE | 0xf). The issue reproduces on Windows 10 and Windows Server 2019 64-bit (Special Pools not required). The crash occurs when any system component calls LoadLibraryEx(LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_IMAGE_RESOURCE) against the file, either directly or through another API such as GetFileVersionInfoSizeExW() or GetFileVersionInfoW(). In practice, this means that as soon as the file is displayed in Explorer, or the user hovers the cursor over it, or tries to open the file properties, or tries to rename it or perform any other similar action, the system will panic. In other words, just downloading such a file may permanently block the user's machine until they remove it through Recovery Mode etc. The attack scenario is similar to the one described in https://www.fortinet.com/blog/threat-research/microsoft-windows-remote-kernel-crash-vulnerability.html. Due to the nature of the bug (OOB read), it could be also potentially exploited as a limited information disclosure primitive. Attached is an archive with a minimized proof-of-concept PE image, the original file used to generate it, and one additional non-minimized sample. Please be careful when unpacking the ZIP as Windows may crash immediately once it sees the corrupted files on disk. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/47488.zip

Products Mentioned

Configuraton 0

Microsoft>>Windows_10 >> Version -

Microsoft>>Windows_10 >> Version 1607

Microsoft>>Windows_10 >> Version 1703

Microsoft>>Windows_10 >> Version 1709

Microsoft>>Windows_10 >> Version 1803

Microsoft>>Windows_10 >> Version 1809

Microsoft>>Windows_10 >> Version 1903

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_2008 >> Version r2

Microsoft>>Windows_server_2012 >> Version -

Microsoft>>Windows_server_2012 >> Version r2

Microsoft>>Windows_server_2016 >> Version -

Microsoft>>Windows_server_2016 >> Version 1803

Microsoft>>Windows_server_2016 >> Version 1903

Microsoft>>Windows_server_2019 >> Version -

Références