CVE-2024-21612

Junos OS Evolved: Specific TCP traffic causes OFP core and restart of RE

State: Published
Severity: 7.5 High
Published: Jan 12, 2024
Updated: Jun 17, 2025
Reserved: Dec 27, 2023

Description

An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

On all Junos OS Evolved platforms, when specific TCP packets are received on an open OFP port, the OFP crashes leading to a restart of Routine Engine (RE). Continuous receipt of these specific TCP packets will lead to a sustained Denial of Service (DoS) condition.

This issue affects:

Juniper Networks Junos OS Evolved

* All versions earlier than 21.2R3-S7-EVO; * 21.3 versions earlier than 21.3R3-S5-EVO ; * 21.4 versions earlier than 21.4R3-S5-EVO; * 22.1 versions earlier than 22.1R3-S4-EVO; * 22.2 versions earlier than 22.2R3-S3-EVO ; * 22.3 versions earlier than 22.3R3-EVO; * 22.4 versions earlier than 22.4R2-EVO, 22.4R3-EVO.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	juniper

Weaknesses

CWE-228 Improper Handling of Syntactically Invalid Structure

Affected Products

Product	Versions
Junos OS EvolvedJuniper Networks	before 21.2R3-S7-EVOAffected 21.3 to before 21.3R3-S5-EVO Affected 21.4 to before 21.4R3-S5-EVOAffected 22.1 to before 22.1R3-S4-EVOAffected 22.2 to before 22.2R3-S3-EVO Affected 22.3 to before 22.3R3-EVOAffected 22.4 to before 22.4R2-EVO, 22.4R3-EVOAffected

References

https://supportportal.juniper.net/JSA75753vendor-advisory
https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Ntechnical-description

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