CVE-2019-14835 : Détail

CVE-2019-14835

7.8
/
Haute
Overflow
0.49%V3
Local
2019-09-17
13h09 +00:00
2020-01-15
11h06 +00:00
CVE.org
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Descriptions du CVE

A buffer overflow flaw was found, in versions from 2.6.34 to 5.2.x, in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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.

Local

The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities.

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.

Low

The attacker 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 has the ability to access only non-sensitive resources.

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.

None

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

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.

High

There is a 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 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.

 nvd@nist.gov
V3.0 7.2 HIGH CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:C/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.

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.

High

The attacker is authorized with (i.e. requires) privileges that provide significant (e.g. administrative) control over the vulnerable component that could affect component-wide settings and files.

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.

Changed

An exploited vulnerability can affect resources beyond the authorization privileges intended by the vulnerable component. In this case the vulnerable component and the impacted component are different.

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
V2 7.2 AV:L/AC:L/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.
EPSS First.org

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version From (including) 2.6.34 To (excluding) 3.16.74

Linux>>Linux_kernel >> Version From (including) 4.4 To (excluding) 4.4.193

Linux>>Linux_kernel >> Version From (including) 4.9 To (excluding) 4.9.193

Linux>>Linux_kernel >> Version From (including) 4.14 To (excluding) 4.14.144

Linux>>Linux_kernel >> Version From (including) 4.19 To (excluding) 4.19.73

Linux>>Linux_kernel >> Version From (including) 5.2 To (excluding) 5.2.15

Linux>>Linux_kernel >> Version 5.3

Configuraton 0

Canonical>>Ubuntu_linux >> Version 12.04

Canonical>>Ubuntu_linux >> Version 14.04

Canonical>>Ubuntu_linux >> Version 16.04

Canonical>>Ubuntu_linux >> Version 18.04

Canonical>>Ubuntu_linux >> Version 19.04

Configuraton 0

Debian>>Debian_linux >> Version 8.0

Debian>>Debian_linux >> Version 9.0

Debian>>Debian_linux >> Version 10.0

Configuraton 0

Fedoraproject>>Fedora >> Version 29

Fedoraproject>>Fedora >> Version 30

Configuraton 0

Opensuse>>Leap >> Version 15.0

Opensuse>>Leap >> Version 15.1

Configuraton 0

Netapp>>Aff_a700s_firmware >> Version -

Netapp>>Aff_a700s >> Version *

Configuraton 0

Netapp>>H410c_firmware >> Version -

Netapp>>H410c >> Version *

Configuraton 0

Netapp>>H610s_firmware >> Version -

Netapp>>H610s >> Version *

Configuraton 0

Netapp>>H300s_firmware >> Version -

Netapp>>H300s >> Version *

Configuraton 0

Netapp>>H500s_firmware >> Version -

Netapp>>H500s >> Version *

Configuraton 0

Netapp>>H700s_firmware >> Version -

Netapp>>H700s >> Version *

Configuraton 0

Netapp>>H300e_firmware >> Version -

Netapp>>H300e >> Version *

Configuraton 0

Netapp>>H500e_firmware >> Version -

Netapp>>H500e >> Version *

Configuraton 0

Netapp>>H700e_firmware >> Version -

Netapp>>H700e >> Version *

Configuraton 0

Netapp>>H410s_firmware >> Version -

Netapp>>H410s >> Version *

Configuraton 0

Netapp>>Data_availability_services >> Version -

Netapp>>Hci_management_node >> Version -

Netapp>>Service_processor >> Version -

Netapp>>Solidfire >> Version -

Netapp>>Steelstore_cloud_integrated_storage >> Version -

Configuraton 0

Redhat>>Openshift_container_platform >> Version 3.11

Redhat>>Enterprise_linux >> Version 8.0

Redhat>>Enterprise_linux_desktop >> Version 6.0

Redhat>>Enterprise_linux_desktop >> Version 7.0

Redhat>>Enterprise_linux_eus >> Version 7.5

Redhat>>Enterprise_linux_eus >> Version 7.6

Redhat>>Enterprise_linux_eus >> Version 7.7

Redhat>>Enterprise_linux_for_real_time >> Version 7

Redhat>>Enterprise_linux_for_real_time >> Version 8

Redhat>>Enterprise_linux_server >> Version 6.0

Redhat>>Enterprise_linux_server >> Version 7.0

Redhat>>Enterprise_linux_server >> Version 7.6

Redhat>>Enterprise_linux_server_aus >> Version 6.5

Redhat>>Enterprise_linux_server_aus >> Version 6.6

Redhat>>Enterprise_linux_server_aus >> Version 7.2

Redhat>>Enterprise_linux_server_aus >> Version 7.3

Redhat>>Enterprise_linux_server_aus >> Version 7.4

Redhat>>Enterprise_linux_server_aus >> Version 7.6

Redhat>>Enterprise_linux_server_aus >> Version 7.7

Redhat>>Enterprise_linux_server_tus >> Version 7.2

Redhat>>Enterprise_linux_server_tus >> Version 7.3

Redhat>>Enterprise_linux_server_tus >> Version 7.4

Redhat>>Enterprise_linux_server_tus >> Version 7.6

Redhat>>Enterprise_linux_server_tus >> Version 7.7

Redhat>>Enterprise_linux_workstation >> Version 6.0

Redhat>>Enterprise_linux_workstation >> Version 7.0

Configuraton 0

Redhat>>Virtualization >> Version 4.0

Redhat>>Virtualization_host >> Version 4.0

Redhat>>Enterprise_linux >> Version 7.0

Configuraton 0

Huawei>>Imanager_neteco >> Version v600r009c00

Huawei>>Imanager_neteco >> Version v600r009c10spc200

Huawei>>Imanager_neteco_6000 >> Version v600r008c10spc300

Huawei>>Imanager_neteco_6000 >> Version v600r008c20

Huawei>>Manageone >> Version 6.5.0

Huawei>>Manageone >> Version 6.5.0.spc100.b210

Huawei>>Manageone >> Version 6.5.1rc1.b060

Huawei>>Manageone >> Version 6.5.1rc1.b080

Huawei>>Manageone >> Version 6.5.rc2.b050

Références

https://usn.ubuntu.com/4135-2/
Tags : vendor-advisory, x_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:2827
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2828
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2830
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2829
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2854
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2862
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2863
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2866
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2864
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2865
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2867
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2869
Tags : vendor-advisory, x_refsource_REDHAT
http://www.openwall.com/lists/oss-security/2019/09/24/1
Tags : mailing-list, x_refsource_MLIST
https://access.redhat.com/errata/RHSA-2019:2889
Tags : vendor-advisory, x_refsource_REDHAT
https://seclists.org/bugtraq/2019/Sep/41
Tags : mailing-list, x_refsource_BUGTRAQ
https://www.debian.org/security/2019/dsa-4531
Tags : vendor-advisory, x_refsource_DEBIAN
https://access.redhat.com/errata/RHSA-2019:2900
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2901
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2899
Tags : vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2924
Tags : vendor-advisory, x_refsource_REDHAT
https://usn.ubuntu.com/4135-1/
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.openwall.com/lists/oss-security/2019/10/03/1
Tags : mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2019/10/09/3
Tags : mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2019/10/09/7
Tags : mailing-list, x_refsource_MLIST
https://access.redhat.com/errata/RHBA-2019:2824
Tags : vendor-advisory, x_refsource_REDHAT
https://seclists.org/bugtraq/2019/Nov/11
Tags : mailing-list, x_refsource_BUGTRAQ