CVE-2021-0233 : A vulnerability in Juniper Networks Junos OS ACX500 Series, ACX4000 Series, may

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.

Published 2021-04-22 20:15:09

Updated 2022-09-20 17:08:52

Source Juniper Networks, Inc.

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2021-0233

Juniper » Junos » Version: 17.4 Update R1
cpe:2.3:o:juniper:junos:17.4:r1:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2
cpe:2.3:o:juniper:junos:17.4:r2:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R1-s3
cpe:2.3:o:juniper:junos:17.4:r1-s3:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4
cpe:2.3:o:juniper:junos:17.4:-:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R1-s1
cpe:2.3:o:juniper:junos:17.4:r1-s1:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R1-s2
cpe:2.3:o:juniper:junos:17.4:r1-s2:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s2
cpe:2.3:o:juniper:junos:17.4:r2-s2:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R1-s5
cpe:2.3:o:juniper:junos:17.4:r1-s5:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R1-s6
cpe:2.3:o:juniper:junos:17.4:r1-s6:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s1
cpe:2.3:o:juniper:junos:17.4:r2-s1:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R1-s4
cpe:2.3:o:juniper:junos:17.4:r1-s4:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R1-s7
cpe:2.3:o:juniper:junos:17.4:r1-s7:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s3
cpe:2.3:o:juniper:junos:17.4:r2-s3:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s4
cpe:2.3:o:juniper:junos:17.4:r2-s4:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s5
cpe:2.3:o:juniper:junos:17.4:r2-s5:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s7
cpe:2.3:o:juniper:junos:17.4:r2-s7:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s6
cpe:2.3:o:juniper:junos:17.4:r2-s6:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s10
cpe:2.3:o:juniper:junos:17.4:r2-s10:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s8
cpe:2.3:o:juniper:junos:17.4:r2-s8:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s9
cpe:2.3:o:juniper:junos:17.4:r2-s9:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R3
cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R3-s1
cpe:2.3:o:juniper:junos:17.4:r3-s1:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A
Juniper » Junos » Version: 17.4 Update R2-s11
cpe:2.3:o:juniper:junos:17.4:r2-s11:*:*:*:*:*:*
Matching versions
When used together with: Juniper » Acx4000 » Version: N/A
When used together with: Juniper » Acx500 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-0233

EPSS FAQ

0.10%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 42 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-0233

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	Juniper Networks, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-0233

CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

Assigned by: sirt@juniper.net (Secondary)
CWE-794 Incomplete Filtering of Multiple Instances of Special Elements

The product receives data from an upstream component, but does not filter all instances of a special element before sending it to a downstream component.

Assigned by: sirt@juniper.net (Secondary)

References for CVE-2021-0233

https://kb.juniper.net/JSA11128

2021-04 Security Bulletin: Junos OS: ACX500 Series, ACX4000 Series: Denial of Service due to FFEB crash while processing high rate of specific packets. (CVE-2021-0233) - Juniper Networks
Vendor Advisory

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Vulnerability Details : CVE-2021-0233

Products affected by CVE-2021-0233

Exploit prediction scoring system (EPSS) score for CVE-2021-0233

CVSS scores for CVE-2021-0233

CWE ids for CVE-2021-0233

References for CVE-2021-0233