CVE-2016-0121 : Detail

CVE-2016-0121

8.8
/
High
A03-Injection
21.98%V3
Network
2016-03-09
10h00 +00:00
2018-10-12
17h57 +00:00
CVE.org
NVD
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CVE Descriptions

The Adobe Type Manager Library 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 and 1511 allows remote attackers to execute arbitrary code via a crafted OpenType font, aka "OpenType Font Parsing Vulnerability."

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-20 Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Metrics

Metrics Score Severity CVSS Vector Source
V3.0 8.8 HIGH CVSS:3.0/AV:N/AC:L/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.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against 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 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 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 : 39560

Publication date : 2016-03-13 23h00 +00:00
Author : Google Security Research
EDB Verified : Yes

Source: https://code.google.com/p/google-security-research/issues/detail?id=683 We have encountered a Windows kernel crash in the ATMFD.DLL OpenType driver while processing a corrupted OTF font file: --- DRIVER_PAGE_FAULT_BEYOND_END_OF_ALLOCATION (d6) N bytes of memory was allocated and more than N bytes are being referenced. This cannot be protected by try-except. When possible, the guilty driver's name (Unicode string) is printed on the bugcheck screen and saved in KiBugCheckDriver. Arguments: Arg1: fb6f5000, memory referenced Arg2: 00000001, value 0 = read operation, 1 = write operation Arg3: 99053e40, if non-zero, the address which referenced memory. Arg4: 00000000, (reserved) Debugging Details: ------------------ Could not read faulting driver name WRITE_ADDRESS: GetPointerFromAddress: unable to read from 827ae84c Unable to read MiSystemVaType memory at 8278d780 fb6f5000 FAULTING_IP: ATMFD+33e40 99053e40 890c82 mov dword ptr [edx+eax*4],ecx MM_INTERNAL_CODE: 0 CUSTOMER_CRASH_COUNT: 1 DEFAULT_BUCKET_ID: VERIFIER_ENABLED_VISTA_MINIDUMP BUGCHECK_STR: 0xD6 PROCESS_NAME: csrss.exe CURRENT_IRQL: 0 ANALYSIS_VERSION: 6.3.9600.17237 (debuggers(dbg).140716-0327) x86fre LAST_CONTROL_TRANSFER: from 99054677 to 99053e40 STACK_TEXT: WARNING: Stack unwind information not available. Following frames may be wrong. b603ecb0 99054677 fb472880 fb6f438c 00000f5c ATMFD+0x33e40 b603ece4 99054776 fb6f4380 00000003 fb6f438c ATMFD+0x34677 b603ed0c 99049fb3 fb472800 fc5b60b8 990663ec ATMFD+0x34776 b603ed30 9904eaf5 fc704c70 990663ec 00000f5c ATMFD+0x29fb3 b603f444 9904f85f fc704c70 9905f028 b603f690 ATMFD+0x2eaf5 b603f500 9904286e fc704c70 9905f028 b603f690 ATMFD+0x2f85f b603f5ec 99042918 fc704c70 b603f690 b603f714 ATMFD+0x2286e b603f618 990333d2 fc704c70 9905f028 b603f690 ATMFD+0x22918 b603f77c 990337a9 00000000 b603f89c fb6bcc80 ATMFD+0x133d2 b603f7d0 990240ff 00000000 b603f89c 00000000 ATMFD+0x137a9 b603f824 9918de12 ff7a5010 fb562cf0 00000001 ATMFD+0x40ff b603f86c 9917687d ff7a5010 fb562cf0 00000001 win32k!PDEVOBJ::QueryFontData+0x3e b603f8e0 991a1653 ffa6a130 fb588b54 0000004c win32k!xInsertMetricsRFONTOBJ+0x9c b603f914 991a3735 00000020 b603f9fc b603fb8c win32k!RFONTOBJ::bGetGlyphMetrics+0x131 b603fbb8 991b6856 17010459 00000060 00000040 win32k!GreGetCharABCWidthsW+0x147 b603fc14 8267fa06 17010459 00000040 00000040 win32k!NtGdiGetCharABCWidthsW+0xf8 b603fc14 776771b4 17010459 00000040 00000040 nt!KiSystemServicePostCall 02dde7ac 00000000 00000000 00000000 00000000 0x776771b4 --- The crash always occurs while trying to write outside of a dynamically allocated destination buffer, leading to a pool-based buffer overflow, potentially allowing for remote code execution in the context of the Windows kernel. While we have not determined the specific root cause of the vulnerability, we have pinpointed the offending mutations to reside in the "CFF " table. The issue reproduces on Windows 7 and 8.1; other platforms were not tested. It is easiest to reproduce with Special Pools enabled for ATMFD.DLL (leading to an immediate crash when the bug is triggered), but it is also possible to observe a crash on a default Windows installation in ATMFD.DLL or another location in kernel space, as caused by the corrupted pool state. Attached is an archive with the proof-of-concept mutated OTF file, together with the original font used to generate it and a corresponding crash log from Windows 7 32-bit. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39560.zip

Products Mentioned

Configuraton 0

Microsoft>>Windows_10 >> Version -

Microsoft>>Windows_10 >> Version 1511

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

https://www.exploit-db.com/exploits/39560/
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securityfocus.com/bid/84027
Tags : vdb-entry, x_refsource_BID
http://www.securitytracker.com/id/1035198
Tags : vdb-entry, x_refsource_SECTRACK