CVE-2016-0199 : Détail

CVE-2016-0199

8.8
/
Haute
Overflow
84.9%V3
Network
2016-06-15
23h00 +00:00
2018-10-12
17h57 +00:00
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Descriptions du CVE

Microsoft Internet Explorer 9 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different vulnerability than CVE-2016-0200 and CVE-2016-3211.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Métriques

Métriques Score Gravité CVSS Vecteur 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

nvd@nist.gov
V2 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C nvd@nist.gov

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.

Informations sur l'Exploit

Exploit Database EDB-ID : 39994

Date de publication : 2016-06-20 22h00 +00:00
Auteur : Skylined
EDB Vérifié : No

<!-- CVE-2016-0199 / MS16-063: MSIE 11 garbage collector attribute type confusion ============================================================================ This information is available in an easier to read format on my blog at http://blog.skylined.nl/ With [MS16-063] Microsoft has patched [CVE-2016-0199]: a memory corruption bug in the garbage collector of the JavaScript engine used in Internet Explorer 11. By exploiting this vulnerability, a website can causes this garbage collector to handle some data in memory as if it was an object, when in fact it contains data for another type of value, such as a string or number. The garbage collector code will use this data as a virtual function table (vftable) in order to make a virtual function call. An attacker has enough control over this data to allow execution of arbitrary code. Known affected software and attack vectors ------------------------------------------ + **Microsoft Internet Explorer 11** (all versions before the June 2016 patch) An attacker would need to get a target user to open a specially crafted webpage. Disabling JavaScript should prevent an attacker from triggering the vulnerable code path. Repro ----- I've created two separate html files that can be used to reproduce this issue and shows control over a 32-bit vftable pointer in x86 versions of MSIE or a partial control over a 64-bit vftable pointer in x64 versions. --> <!DOCTYPE html> <meta http-equiv="X-UA-Compatible" content="IE=7"> <script> oElement = document.createElement("IMG"); var oAttr = document.createAttribute("loop"); oAttr.nodeValue = oElement; oElement.loop = 0x41424344; // Set original value data to 44 43 42 41 oElement.setAttributeNode(oAttr); // Replace oElement with original value data oElement.removeAttributeNode(oAttr); CollectGarbage(); // Use original value data as address 0x41424344 of a vftable </script> <!-- (I've had to use xcript rather than script because Gmail refused to send it otherwise, see https://support.google.com/mail/answer/6590 for the reason.) Description ----------- When `setAttributeNode` is used to set an attribute of a HTML element, and the `Attr` node's `nodeValue` is not a valid value, this `nodeValue` is set to the value the attribute had before the call. This can happen for instance when you try to set an attribute that must have a string or number value by using an `Attr` node with a HTML element as its `nodeValue` (as this is not a string or number). The HTML element in `nodeValue` is replaced with the string or number value the attribute had before the call to `setAttributeNode`. If the `Attr` node is then removed using `removeAttributeNode` and the garbage collector runs, the code appears to assume the nodeValue still contains an object, rather than the string or number it has been changed into. This causes the code to use the data for the string or number value as if it was a C++ object. It attempts to determine a function pointer for a method from the object's virtual function table before calling this function using the pointer. If the previous value is a string, the character data from the string is used to calculate the function pointer. If the previous value is a number, the value of the number is used. This provides an attacker with a large amount of control over the function pointer and may allow execution of arbitrary code. Scanner ------- I build a "scanner" to analyze this issue and help create two proof-of-concept files that show control over the vftable pointer. More details and the source for these can be found on my blog at http://blog.skylined.nl. -->

Products Mentioned

Configuraton 0

Microsoft>>Internet_explorer >> Version 9

Microsoft>>Internet_explorer >> Version 10

Microsoft>>Internet_explorer >> Version 11

Références

https://www.exploit-db.com/exploits/39994/
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securitytracker.com/id/1036096
Tags : vdb-entry, x_refsource_SECTRACK
http://seclists.org/fulldisclosure/2016/Jun/44
Tags : mailing-list, x_refsource_FULLDISC