Description

A Denial of Service (DoS) vulnerability in the processing of a flood of specific ARP traffic in Juniper Networks Junos OS on the EX4300 switch, sent from the local broadcast domain, may allow an unauthenticated network-adjacent attacker to trigger a PFEMAN watchdog timeout, causing the Packet Forwarding Engine (PFE) to crash and restart. After the restart, transit traffic will be temporarily interrupted until the PFE is reprogrammed. In a virtual chassis (VC), the impacted Flexible PIC Concentrator (FPC) may split from the VC temporarily, and join back into the VC once the PFE restarts. Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS on the EX4300: All versions prior to 15.1R7-S12; 18.4 versions prior to 18.4R2-S10, 18.4R3-S11; 19.1 versions prior to 19.1R3-S8; 19.2 versions prior to 19.2R1-S9, 19.2R3-S4; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R2-S6, 19.4R3-S7; 20.1 versions prior to 20.1R3-S3; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S2; 20.4 versions prior to 20.4R3-S1; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2-S1, 21.2R3; 21.3 versions prior to 21.3R1-S2, 21.3R2.

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

CNA:  Juniper Networks, Inc.

Base Score:  6.5 MEDIUM

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

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score:  6.1 MEDIUM

Vector:  (AV:A/AC:L/Au:N/C:N/I:N/A:C)

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink	Resource
https://kb.juniper.net/JSA69502	Vendor Advisory
https://kb.juniper.net/JSA69502	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-400	Uncontrolled Resource Consumption	NIST
CWE-410	Insufficient Resource Pool	Juniper Networks, Inc.

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

3 change records found show changes

CVE Modified by CVE 11/21/2024 1:46:21 AM

Action	Type	Old Value	New Value
Added	Reference		https://kb.juniper.net/JSA69502

CVE Modified by Juniper Networks, Inc. 5/14/2024 6:13:35 AM

Action	Type	Old Value	New Value

Initial Analysis by NIST 4/21/2022 5:49:30 AM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added	CVSS V2		NIST (AV:A/AC:L/Au:N/C:N/I:N/A:C)
Added	CWE		NIST CWE-400
Added	CPE Configuration		Record truncated, showing 500 of 11971 characters. View Entire Change Record AND OR *cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* versions up to (excluding) 15.1 *cpe:2.3:o:juniper:junos:15.1:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1:a1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1:f:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1:f1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1:f2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1:f2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1:f2-s2:*:*:*:*:*:* *cpe:2
Changed	Reference Type	https://kb.juniper.net/JSA69502 No Types Assigned	https://kb.juniper.net/JSA69502 Vendor Advisory