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Juniper Junos OS DoS (JSA11101)

critical Nessus Plugin ID 146090

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The version of Junos OS installed on the remote host is affected by a denial of service vulnerability. An unauthenticated remote attacker can send a valid BGP FlowSpec message thereby causing an unexpected change in the route advertisements within the BGP FlowSpec domain leading to disruptions in network traffic causing a Denial of Service (DoS) condition as referenced in the JSA11101 advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Apply the relevant Junos software release referenced in Juniper advisory JSA11101

See Also

https://kb.juniper.net/JSA11101

Plugin Details

Severity: Critical

ID: 146090

File Name: juniper_jsa11101.nasl

Version: 1.7

Type: combined

Published: 2/3/2021

Updated: 2/19/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

CVSS Score Source: CVE-2021-0211

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:juniper:junos

Required KB Items: Host/Juniper/model, Host/Juniper/JUNOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 1/13/2021

Vulnerability Publication Date: 1/13/2021

Reference Information

CVE: CVE-2021-0211

IAVA: 2021-A-0036-S

JSA: JSA11101