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CVE-2021-0271 : Détail

CVE-2021-0271

6.5
/
MEDIUM
0.06%V3
Adjacent
2021-04-13 22:00 +00:00
2024-08-03 15:32 +00:00
CVE.org
NVD

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Gestion des alertes

Descriptions

Junos OS: EX2200-C Series, EX3200 Series, EX3300 Series, EX4200 Series, EX4500 Series, EX4550 Series, EX6210 Series, EX8208 Series, EX8216 Series: Receipt of a crafted ARP packet by an adjacent attacker will cause the sfid process to core.

A Double Free vulnerability in the software forwarding interface daemon (sfid) process of Juniper Networks Junos OS allows an adjacently-connected attacker to cause a Denial of Service (DoS) by sending a crafted ARP packet to the device. Continued receipt and processing of the crafted ARP packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on EX2200-C Series, EX3200 Series, EX3300 Series, EX4200 Series, EX4500 Series, EX4550 Series, EX6210 Series, EX8208 Series, EX8216 Series. 12.3 versions prior to 12.3R12-S17; 15.1 versions prior to 15.1R7-S8. This issue only affects the listed Marvell-chipset based EX Series devices. No other products or platforms are affected.

Solutions

The following software releases have been updated to resolve this specific issue: Junos OS: 12.3R12-S17, 15.1R7-S8, and all subsequent releases.

Informations

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-415 Double Free
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.

Metrics

Metric Score Sévérité CVSS Vecteur Source
V3.1 6.5 MEDIUM CVSS:3.1/AV:A/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.

Adjacent

The vulnerable component is bound to the network stack, but the attack is limited at the protocol level to a logically adjacent topology. This can mean an attack must be launched from the same shared physical (e.g., Bluetooth or IEEE 802.11) or logical (e.g., local IP subnet) network, or from within a secure or otherwise limited administrative domain (e.g., MPLS, secure VPN to an administrative network zone).

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.
V2 3.3 AV:A/AC:L/Au:N/C:N/I:N/A:P [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

EPSS Score

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.

EPSS Percentile

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

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 12.3

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Junos >> Version 15.1

Juniper>>Ex2200-c >> Version -

Juniper>>Ex3200 >> Version -

Juniper>>Ex3300 >> Version -

Juniper>>Ex4200 >> Version -

Juniper>>Ex4500 >> Version -

Juniper>>Ex4550 >> Version -

Juniper>>Ex6210 >> Version -

Juniper>>Ex8208 >> Version -

Juniper>>Ex8216 >> Version -

References

https://kb.juniper.net/JSA11162
Tags : x_refsource_MISC

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