CVE-2017-3823 : Détail

CVE-2017-3823

8.8
/
Haute
Overflow
94.99%V3
Network
2017-02-01
10h00 +00:00
2017-10-09
11h57 +00:00
CVE.org
NVD
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Descriptions du CVE

An issue was discovered in the Cisco WebEx Extension before 1.0.7 on Google Chrome, the ActiveTouch General Plugin Container before 106 on Mozilla Firefox, the GpcContainer Class ActiveX control plugin before 10031.6.2017.0126 on Internet Explorer, and the Download Manager ActiveX control plugin before 2.1.0.10 on Internet Explorer. A vulnerability in these Cisco WebEx browser extensions could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the affected browser on an affected system. This vulnerability affects the browser extensions for Cisco WebEx Meetings Server and Cisco WebEx Centers (Meeting Center, Event Center, Training Center, and Support Center) when they are running on Microsoft Windows. The vulnerability is a design defect in an application programing interface (API) response parser within the extension. An attacker that can convince an affected user to visit an attacker-controlled web page or follow an attacker-supplied link with an affected browser could exploit the vulnerability. If successful, the attacker could execute arbitrary code with the privileges of the affected browser.

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

 [email protected]
V2 9.3 AV:N/AC:M/Au:N/C:C/I:C/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

Products Mentioned

Configuraton 0

Cisco>>Activetouch_general_plugin_container >> Version 105

Cisco>>Download_manager >> Version 2.1.0.9

Cisco>>Gpccontainer_class >> Version To (including) 10031.6.2017.0125

Cisco>>Webex >> Version To (including) 1.0.6

Configuraton 0

Cisco>>Webex_meetings_server >> Version 2.0_base

Cisco>>Webex_meetings_server >> Version 2.0_mr2

Cisco>>Webex_meetings_server >> Version 2.0_mr3

Cisco>>Webex_meetings_server >> Version 2.0_mr4

Cisco>>Webex_meetings_server >> Version 2.0_mr5

Cisco>>Webex_meetings_server >> Version 2.0_mr6

Cisco>>Webex_meetings_server >> Version 2.0_mr7

Cisco>>Webex_meetings_server >> Version 2.0_mr8

Cisco>>Webex_meetings_server >> Version 2.0_mr8

Cisco>>Webex_meetings_server >> Version 2.0_mr9

Cisco>>Webex_meetings_server >> Version 2.0_mr9

Cisco>>Webex_meetings_server >> Version 2.0_mr9

Cisco>>Webex_meetings_server >> Version 2.0_mr9

Cisco>>Webex_meetings_server >> Version 2.5_base

Cisco>>Webex_meetings_server >> Version 2.5_mr1

Cisco>>Webex_meetings_server >> Version 2.5_mr2

Cisco>>Webex_meetings_server >> Version 2.5_mr2

Cisco>>Webex_meetings_server >> Version 2.5_mr3

Cisco>>Webex_meetings_server >> Version 2.5_mr4

Cisco>>Webex_meetings_server >> Version 2.5_mr5

Cisco>>Webex_meetings_server >> Version 2.5_mr5

Cisco>>Webex_meetings_server >> Version 2.5_mr6

Cisco>>Webex_meetings_server >> Version 2.5_mr6

Cisco>>Webex_meetings_server >> Version 2.5_mr6

Cisco>>Webex_meetings_server >> Version 2.5_mr6

Cisco>>Webex_meetings_server >> Version 2.6_base

Cisco>>Webex_meetings_server >> Version 2.6_mr1

Cisco>>Webex_meetings_server >> Version 2.6_mr1

Cisco>>Webex_meetings_server >> Version 2.6_mr2

Cisco>>Webex_meetings_server >> Version 2.6_mr2

Cisco>>Webex_meetings_server >> Version 2.6_mr3

Cisco>>Webex_meetings_server >> Version 2.6_mr3

Cisco>>Webex_meetings_server >> Version 2.7_base

Cisco>>Webex_meetings_server >> Version 2.7_mr1

Cisco>>Webex_meetings_server >> Version 2.7_mr1

Cisco>>Webex_meetings_server >> Version 2.7_mr2

Configuraton 0

Cisco>>Webex_meeting_center >> Version 2.6_base

Cisco>>Webex_meeting_center >> Version 2.6_mr1

Cisco>>Webex_meeting_center >> Version 2.6_mr1

Cisco>>Webex_meeting_center >> Version 2.6_mr2

Cisco>>Webex_meeting_center >> Version 2.6_mr2

Cisco>>Webex_meeting_center >> Version 2.6_mr3

Cisco>>Webex_meeting_center >> Version 2.6_mr3

Cisco>>Webex_meeting_center >> Version 2.7_base

Cisco>>Webex_meeting_center >> Version 2.7_mr1

Cisco>>Webex_meeting_center >> Version 2.7_mr1

Cisco>>Webex_meeting_center >> Version 2.7_mr2

Cisco>>Webex_meeting_center >> Version t29_base

Cisco>>Webex_meeting_center >> Version t30_base

Cisco>>Webex_meeting_center >> Version t31_base

Références

https://www.kb.cert.org/vuls/id/909240
Tags : third-party-advisory, x_refsource_CERT-VN
http://www.securityfocus.com/bid/95737
Tags : vdb-entry, x_refsource_BID
http://www.securitytracker.com/id/1037680
Tags : vdb-entry, x_refsource_SECTRACK