Juniper Junos OS Vulnerability (JSA11191)

high Nessus Plugin ID 151637

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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 vulnerability as referenced in the JSA11191 advisory.

- When user-defined ARP Policer is configured and applied on one or more Aggregated Ethernet (AE) interface units, a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability between the Device Control Daemon (DCD) and firewall process (dfwd) daemons of Juniper Networks Junos OS allows an attacker to bypass the user-defined ARP Policer. In this particular case the User ARP policer is replaced with default ARP policer. (CVE-2021-0289)

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 JSA11191

Plugin Details

Severity: High

ID: 151637

File Name: juniper_jsa11191.nasl

Version: 1.4

Type: combined

Family: Junos Local Security Checks

Published: 7/14/2021

Updated: 1/26/2022

Supported Sensors: Nessus

Risk Information

CVSS v2

Risk Factor: High

Base Score: 8.3

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

CVSS Score Source: CVE-2021-0289

CVSS v3

Risk Factor: High

Base Score: 7.4

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

Vulnerability Information

CPE: cpe:/o:juniper:junos

Required KB Items: Host/Juniper/JUNOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 7/14/2021

Vulnerability Publication Date: 7/14/2021

Reference Information

IAVA: 2021-A-0324-S

JSA: JSA11191

Detections

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