CVE-2021-1446 : Détail

CVE-2021-1446

8.6
/
Haute
0.13%V3
Network
2021-03-24
20h06 +00:00
2024-11-08
23h34 +00:00
CVE.org
NVD
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Descriptions du CVE

Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability

A vulnerability in the DNS application layer gateway (ALG) functionality used by Network Address Translation (NAT) in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a logic error that occurs when an affected device inspects certain DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through an affected device that is performing NAT for DNS packets. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition on an affected device. The vulnerability can be exploited only by traffic that is sent through an affected device via IPv4 packets. The vulnerability cannot be exploited via IPv6 traffic.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-754 Improper Check for Unusual or Exceptional Conditions
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.1 8.6 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

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.

Changed

An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.

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.
V3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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.

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

Products Mentioned

Configuraton 0

Cisco>>Ios_xe >> Version 3.7.0bs

Cisco>>Ios_xe >> Version 3.7.0s

Cisco>>Ios_xe >> Version 3.7.0xas

Cisco>>Ios_xe >> Version 3.7.0xbs

Cisco>>Ios_xe >> Version 3.7.1as

Cisco>>Ios_xe >> Version 3.7.1s

Cisco>>Ios_xe >> Version 3.7.2s

Cisco>>Ios_xe >> Version 3.7.2ts

Cisco>>Ios_xe >> Version 3.7.3s

Cisco>>Ios_xe >> Version 3.7.4as

Cisco>>Ios_xe >> Version 3.7.4s

Cisco>>Ios_xe >> Version 3.7.5s

Cisco>>Ios_xe >> Version 3.7.6s

Cisco>>Ios_xe >> Version 3.7.7s

Cisco>>Ios_xe >> Version 3.7.8s

Cisco>>Ios_xe >> Version 3.8.0s

Cisco>>Ios_xe >> Version 3.8.1s

Cisco>>Ios_xe >> Version 3.8.2s

Cisco>>Ios_xe >> Version 3.9.0as

Cisco>>Ios_xe >> Version 3.9.0s

Cisco>>Ios_xe >> Version 3.9.0xas

Cisco>>Ios_xe >> Version 3.9.1as

Cisco>>Ios_xe >> Version 3.9.1s

Cisco>>Ios_xe >> Version 3.9.2s

Cisco>>Ios_xe >> Version 3.10.0s

Cisco>>Ios_xe >> Version 3.10.1s

Cisco>>Ios_xe >> Version 3.10.1xbs

Cisco>>Ios_xe >> Version 3.10.1xcs

Cisco>>Ios_xe >> Version 3.10.2as

Cisco>>Ios_xe >> Version 3.10.2s

Cisco>>Ios_xe >> Version 3.10.2ts

Cisco>>Ios_xe >> Version 3.10.3s

Cisco>>Ios_xe >> Version 3.10.4s

Cisco>>Ios_xe >> Version 3.10.5s

Cisco>>Ios_xe >> Version 3.10.6s

Cisco>>Ios_xe >> Version 3.10.7s

Cisco>>Ios_xe >> Version 3.10.8as

Cisco>>Ios_xe >> Version 3.10.8s

Cisco>>Ios_xe >> Version 3.10.9s

Cisco>>Ios_xe >> Version 3.10.10s

Cisco>>Ios_xe >> Version 3.11.0s

Cisco>>Ios_xe >> Version 3.11.1s

Cisco>>Ios_xe >> Version 3.11.2s

Cisco>>Ios_xe >> Version 3.11.3s

Cisco>>Ios_xe >> Version 3.11.4s

Cisco>>Ios_xe >> Version 3.12.0as

Cisco>>Ios_xe >> Version 3.12.0s

Cisco>>Ios_xe >> Version 3.12.1s

Cisco>>Ios_xe >> Version 3.12.2s

Cisco>>Ios_xe >> Version 3.12.3s

Cisco>>Ios_xe >> Version 3.12.4s

Cisco>>Ios_xe >> Version 3.13.0as

Cisco>>Ios_xe >> Version 3.13.0s

Cisco>>Ios_xe >> Version 3.13.1s

Cisco>>Ios_xe >> Version 3.13.2as

Cisco>>Ios_xe >> Version 3.13.2s

Cisco>>Ios_xe >> Version 3.13.3s

Cisco>>Ios_xe >> Version 3.13.4s

Cisco>>Ios_xe >> Version 3.13.5as

Cisco>>Ios_xe >> Version 3.13.5s

Cisco>>Ios_xe >> Version 3.13.6as

Cisco>>Ios_xe >> Version 3.13.6bs

Cisco>>Ios_xe >> Version 3.13.6s

Cisco>>Ios_xe >> Version 3.13.7as

Cisco>>Ios_xe >> Version 3.13.7s

Cisco>>Ios_xe >> Version 3.13.8s

Cisco>>Ios_xe >> Version 3.13.9s

Cisco>>Ios_xe >> Version 3.13.10s

Cisco>>Ios_xe >> Version 3.14.0s

Cisco>>Ios_xe >> Version 3.14.1s

Cisco>>Ios_xe >> Version 3.14.2s

Cisco>>Ios_xe >> Version 3.14.3s

Cisco>>Ios_xe >> Version 3.14.4s

Cisco>>Ios_xe >> Version 3.15.0s

Cisco>>Ios_xe >> Version 3.15.1cs

Cisco>>Ios_xe >> Version 3.15.1s

Cisco>>Ios_xe >> Version 3.15.1xbs

Cisco>>Ios_xe >> Version 3.15.2s

Cisco>>Ios_xe >> Version 3.15.2xbs

Cisco>>Ios_xe >> Version 3.15.3s

Cisco>>Ios_xe >> Version 3.15.4s

Cisco>>Ios_xe >> Version 3.16.0as

Cisco>>Ios_xe >> Version 3.16.0bs

Cisco>>Ios_xe >> Version 3.16.0cs

Cisco>>Ios_xe >> Version 3.16.0s

Cisco>>Ios_xe >> Version 3.16.1as

Cisco>>Ios_xe >> Version 3.16.1s

Cisco>>Ios_xe >> Version 3.16.2as

Cisco>>Ios_xe >> Version 3.16.2bs

Cisco>>Ios_xe >> Version 3.16.2s

Cisco>>Ios_xe >> Version 3.16.3as

Cisco>>Ios_xe >> Version 3.16.3s

Cisco>>Ios_xe >> Version 3.16.4as

Cisco>>Ios_xe >> Version 3.16.4bs

Cisco>>Ios_xe >> Version 3.16.4cs

Cisco>>Ios_xe >> Version 3.16.4ds

Cisco>>Ios_xe >> Version 3.16.4es

Cisco>>Ios_xe >> Version 3.16.4gs

Cisco>>Ios_xe >> Version 3.16.4s

Cisco>>Ios_xe >> Version 3.16.5as

Cisco>>Ios_xe >> Version 3.16.5bs

Cisco>>Ios_xe >> Version 3.16.5s

Cisco>>Ios_xe >> Version 3.16.6bs

Cisco>>Ios_xe >> Version 3.16.6s

Cisco>>Ios_xe >> Version 3.16.7as

Cisco>>Ios_xe >> Version 3.16.7bs

Cisco>>Ios_xe >> Version 3.16.7s

Cisco>>Ios_xe >> Version 3.16.8s

Cisco>>Ios_xe >> Version 3.16.9s

Cisco>>Ios_xe >> Version 3.16.10as

Cisco>>Ios_xe >> Version 3.16.10s

Cisco>>Ios_xe >> Version 3.17.0s

Cisco>>Ios_xe >> Version 3.17.1as

Cisco>>Ios_xe >> Version 3.17.1s

Cisco>>Ios_xe >> Version 3.17.2s

Cisco>>Ios_xe >> Version 3.17.3s

Cisco>>Ios_xe >> Version 3.17.4s

Cisco>>Ios_xe >> Version 3.18.0as

Cisco>>Ios_xe >> Version 3.18.0s

Cisco>>Ios_xe >> Version 3.18.0sp

Cisco>>Ios_xe >> Version 3.18.1asp

Cisco>>Ios_xe >> Version 3.18.1bsp

Cisco>>Ios_xe >> Version 3.18.1csp

Cisco>>Ios_xe >> Version 3.18.1gsp

Cisco>>Ios_xe >> Version 3.18.1hsp

Cisco>>Ios_xe >> Version 3.18.1isp

Cisco>>Ios_xe >> Version 3.18.1s

Cisco>>Ios_xe >> Version 3.18.1sp

Cisco>>Ios_xe >> Version 3.18.2asp

Cisco>>Ios_xe >> Version 3.18.2s

Cisco>>Ios_xe >> Version 3.18.2sp

Cisco>>Ios_xe >> Version 3.18.3asp

Cisco>>Ios_xe >> Version 3.18.3bsp

Cisco>>Ios_xe >> Version 3.18.3s

Cisco>>Ios_xe >> Version 3.18.3sp

Cisco>>Ios_xe >> Version 3.18.4s

Cisco>>Ios_xe >> Version 3.18.4sp

Cisco>>Ios_xe >> Version 3.18.5sp

Cisco>>Ios_xe >> Version 3.18.6sp

Cisco>>Ios_xe >> Version 3.18.7sp

Cisco>>Ios_xe >> Version 3.18.8asp

Cisco>>Ios_xe >> Version 3.18.8sp

Cisco>>Ios_xe >> Version 16.1.1

Cisco>>Ios_xe >> Version 16.1.2

Cisco>>Ios_xe >> Version 16.1.3

Cisco>>Ios_xe >> Version 16.2.1

Cisco>>Ios_xe >> Version 16.2.2

Cisco>>Ios_xe >> Version 16.3.1

Cisco>>Ios_xe >> Version 16.3.1a

Cisco>>Ios_xe >> Version 16.3.2

Cisco>>Ios_xe >> Version 16.3.3

Cisco>>Ios_xe >> Version 16.3.4

Cisco>>Ios_xe >> Version 16.3.5

Cisco>>Ios_xe >> Version 16.3.5b

Cisco>>Ios_xe >> Version 16.3.6

Cisco>>Ios_xe >> Version 16.3.7

Cisco>>Ios_xe >> Version 16.3.8

Cisco>>Ios_xe >> Version 16.3.9

Cisco>>Ios_xe >> Version 16.3.10

Cisco>>Ios_xe >> Version 16.3.11

Cisco>>Ios_xe >> Version 16.4.1

Cisco>>Ios_xe >> Version 16.4.2

Cisco>>Ios_xe >> Version 16.4.3

Cisco>>Ios_xe >> Version 16.5.1

Cisco>>Ios_xe >> Version 16.5.1a

Cisco>>Ios_xe >> Version 16.5.1b

Cisco>>Ios_xe >> Version 16.5.2

Cisco>>Ios_xe >> Version 16.5.3

Cisco>>Ios_xe >> Version 16.6.1

Cisco>>Ios_xe >> Version 16.6.2

Cisco>>Ios_xe >> Version 16.6.3

Cisco>>Ios_xe >> Version 16.6.4

Cisco>>Ios_xe >> Version 16.6.4a

Cisco>>Ios_xe >> Version 16.6.4s

Cisco>>Ios_xe >> Version 16.6.5

Cisco>>Ios_xe >> Version 16.6.5a

Cisco>>Ios_xe >> Version 16.6.5b

Cisco>>Ios_xe >> Version 16.6.6

Cisco>>Ios_xe >> Version 16.6.7

Cisco>>Ios_xe >> Version 16.6.7a

Cisco>>Ios_xe >> Version 16.6.8

Cisco>>Ios_xe >> Version 16.7.1

Cisco>>Ios_xe >> Version 16.7.1a

Cisco>>Ios_xe >> Version 16.7.1b

Cisco>>Ios_xe >> Version 16.7.2

Cisco>>Ios_xe >> Version 16.7.3

Cisco>>Ios_xe >> Version 16.7.4

Cisco>>Ios_xe >> Version 16.8.1

Cisco>>Ios_xe >> Version 16.8.1a

Cisco>>Ios_xe >> Version 16.8.1b

Cisco>>Ios_xe >> Version 16.8.1c

Cisco>>Ios_xe >> Version 16.8.1d

Cisco>>Ios_xe >> Version 16.8.1e

Cisco>>Ios_xe >> Version 16.8.1s

Cisco>>Ios_xe >> Version 16.8.2

Cisco>>Ios_xe >> Version 16.8.3

Cisco>>Ios_xe >> Version 16.9.1

Cisco>>Ios_xe >> Version 16.9.1a

Cisco>>Ios_xe >> Version 16.9.1b

Cisco>>Ios_xe >> Version 16.9.1c

Cisco>>Ios_xe >> Version 16.9.1d

Cisco>>Ios_xe >> Version 16.9.1s

Cisco>>Ios_xe >> Version 16.9.2

Cisco>>Ios_xe >> Version 16.9.2a

Cisco>>Ios_xe >> Version 16.9.2s

Cisco>>Ios_xe >> Version 16.9.3

Cisco>>Ios_xe >> Version 16.9.3a

Cisco>>Ios_xe >> Version 16.9.3h

Cisco>>Ios_xe >> Version 16.9.3s

Cisco>>Ios_xe >> Version 16.9.4

Cisco>>Ios_xe >> Version 16.9.4c

Cisco>>Ios_xe >> Version 16.9.5

Cisco>>Ios_xe >> Version 16.9.5f

Cisco>>Ios_xe >> Version 16.9.6

Cisco>>Ios_xe >> Version 16.10.1

Cisco>>Ios_xe >> Version 16.10.1a

Cisco>>Ios_xe >> Version 16.10.1b

Cisco>>Ios_xe >> Version 16.10.1c

Cisco>>Ios_xe >> Version 16.10.1d

Cisco>>Ios_xe >> Version 16.10.1e

Cisco>>Ios_xe >> Version 16.10.1f

Cisco>>Ios_xe >> Version 16.10.1g

Cisco>>Ios_xe >> Version 16.10.1s

Cisco>>Ios_xe >> Version 16.10.2

Cisco>>Ios_xe >> Version 16.10.3

Cisco>>Ios_xe >> Version 16.11.1

Cisco>>Ios_xe >> Version 16.11.1a

Cisco>>Ios_xe >> Version 16.11.1b

Cisco>>Ios_xe >> Version 16.11.1c

Cisco>>Ios_xe >> Version 16.11.1s

Cisco>>Ios_xe >> Version 16.11.2

Cisco>>Ios_xe >> Version 16.12.1

Cisco>>Ios_xe >> Version 16.12.1a

Cisco>>Ios_xe >> Version 16.12.1c

Cisco>>Ios_xe >> Version 16.12.1s

Cisco>>Ios_xe >> Version 16.12.1t

Cisco>>Ios_xe >> Version 16.12.1w

Cisco>>Ios_xe >> Version 16.12.1x

Cisco>>Ios_xe >> Version 16.12.1y

Cisco>>Ios_xe >> Version 16.12.1z

Cisco>>Ios_xe >> Version 16.12.1z1

Cisco>>Ios_xe >> Version 16.12.1za

Cisco>>Ios_xe >> Version 16.12.2

Cisco>>Ios_xe >> Version 16.12.2a

Cisco>>Ios_xe >> Version 16.12.2s

Cisco>>Ios_xe >> Version 16.12.2t

Cisco>>Ios_xe >> Version 16.12.3

Cisco>>Ios_xe >> Version 16.12.3a

Cisco>>Ios_xe >> Version 16.12.3s

Cisco>>Ios_xe >> Version 16.12.4

Cisco>>Ios_xe >> Version 16.12.4a

Cisco>>Ios_xe >> Version 17.1.1

Cisco>>Ios_xe >> Version 17.1.1a

Cisco>>Ios_xe >> Version 17.1.1s

Cisco>>Ios_xe >> Version 17.1.1t

Cisco>>Ios_xe >> Version 17.1.2

Cisco>>Ios_xe >> Version 17.2.1

Cisco>>Ios_xe >> Version 17.2.1a

Cisco>>Ios_xe >> Version 17.2.1r

Cisco>>Ios_xe >> Version 17.2.1v

Cisco>>Ios_xe >> Version 17.2.2

Cisco>>Ios_xe >> Version 17.2.3

Cisco>>Ios_xe >> Version 17.3.1

Cisco>>Ios_xe >> Version 17.3.1a

Cisco>>Ios_xe >> Version 17.3.1w

Références