CVE-2021-0233 - CVE House

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Status published High CVE-2021-0233

Junos OS: ACX500 Series, ACX4000 Series: Denial of Service due to FFEB crash while processing high rate of specific packets.

7.5 CVSS

Vulnerability Description

A vulnerability in Juniper Networks Junos OS ACX500 Series, ACX4000 Series, may allow an attacker to cause a Denial of Service (DoS) by sending a high rate of specific packets to the device, resulting in a Forwarding Engine Board (FFEB) crash. Continued receipt of these packets will sustain the Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS on ACX500 Series, ACX4000 Series: 17.4 versions prior to 17.4R3-S2.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

https://kb.juniper.net/JSA11128

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Affected Vendor

Juniper Networks

View all reports →

Affected Software

Junos OS

Vulnerable Versions:

17.4

Timeline

Official Publish: April 22nd, 2021

Last Modified: September 16th, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-794 CWE-400

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service

T1498 Network Denial of Service