CVE-2024-30402

Junos OS and Junos OS Evolved: The l2ald crashes on receiving telemetry messages from a specific subscription

Severity Score

8.2

*CVSS v4

Exploit Likelihood

< 1%

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control. Repeated occurrences of these events causes a sustained DoS condition. This issue affects:
Junos OS: * All versions earlier than 20.4R3-S10; * 21.2 versions earlier than 21.2R3-S7; * 21.4 versions earlier than 21.4R3-S5; * 22.1 versions earlier than 22.1R3-S4; * 22.2 versions earlier than 22.2R3-S3; * 22.3 versions earlier than 22.3R3-S1; * 22.4 versions earlier than 22.4R3; * 23.2 versions earlier than 23.2R1-S2, 23.2R2. Junos OS Evolved: * All versions earlier than 21.4R3-S5-EVO; * 22.1-EVO versions earlier than 22.1R3-S4-EVO; * 22.2-EVO versions earlier than 22.2R3-S3-EVO; * 22.3-EVO versions earlier than 22.3R3-S1-EVO; * 22.4-EVO versions earlier than 22.4R3-EVO; * 23.2-EVO versions earlier than 23.2R2-EVO.

Una verificación inadecuada de la vulnerabilidad de condiciones inusuales o excepcionales en el daemon de aprendizaje de direcciones de capa 2 (l2ald) de Juniper Networks Junos OS y Junos OS Evolved permite que un atacante adyacente no autenticado provoque una denegación de servicio (DoS). Cuando se envían solicitudes de telemetría al dispositivo y el daemon de renderizado dinámico (drend) se suspende, l2ald falla y se reinicia debido a factores fuera del control de los atacantes. La ocurrencia repetida de estos eventos causa una condición DoS sostenida. Este problema afecta a: Junos OS: todas las versiones anteriores a 20.4R3-S10; Versiones 21.2 anteriores a 21.2R3-S7; Versiones 21.4 anteriores a 21.4R3-S5; Versiones 22.1 anteriores a 22.1R3-S4; Versiones 22.2 anteriores a 22.2R3-S3; Versiones 22.3 anteriores a 22.3R3-S1; Versiones 22.4 anteriores a 22.4R3; Versiones 23.2 anteriores a 23.2R1-S2, 23.2R2. Junos OS Evolved: todas las versiones anteriores a 21.4R3-S5-EVO; Versiones 22.1-EVO anteriores a 22.1R3-S4-EVO; Versiones 22.2-EVO anteriores a 22.2R3-S3-EVO; Versiones 22.3-EVO anteriores a 22.3R3-S1-EVO; Versiones 22.4-EVO anteriores a 22.4R3-EVO; Versiones 23.2-EVO anteriores a 23.2R2-EVO.

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control. Repeated occurrences of these events causes a sustained DoS condition. This issue affects: Junos OS: * All versions earlier than 20.4R3-S10; * 21.2 versions earlier than 21.2R3-S7; * 21.4 versions earlier than 21.4R3-S5; * 22.1 versions earlier than 22.1R3-S4; * 22.2 versions earlier than 22.2R3-S3; * 22.3 versions earlier than 22.3R3-S1; * 22.4 versions earlier than 22.4R3; * 23.2 versions earlier than 23.2R1-S2, 23.2R2. Junos OS Evolved: * All versions earlier than 21.4R3-S5-EVO; * 22.1-EVO versions earlier than 22.1R3-S4-EVO; * 22.2-EVO versions earlier than 22.2R3-S3-EVO; * 22.3-EVO versions earlier than 22.3R3-S1-EVO; * 22.4-EVO versions earlier than 22.4R3-EVO; * 23.2-EVO versions earlier than 23.2R2-EVO.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

Present

Privileges Required

None

User Interaction

None

System

Vulnerable | Subsequent

Confidentiality

None

Integrity

None

Availability

High

Low

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-03-26 CVE Reserved
2024-04-12 CVE Published
2024-08-02 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-754: Improper Check for Unusual or Exceptional Conditions

CAPEC

References (2)

URL	Tag	Source
https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/...	Technical Description

1 - 1 of 1

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://supportportal.juniper.net/JSA79180	2024-05-16

1 - 1 of 1

Affected Vendors, Products, and Versions (15)

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 20.4 < 20.4R3-S10 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 20.4 < 20.4R3-S10"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 21.2 < 21.2R3-S7 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 21.2 < 21.2R3-S7"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 21.4 < 21.4R3-S5 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 21.4 < 21.4R3-S5"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.1 < 22.1R3-S4 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.1 < 22.1R3-S4"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.2 < 22.2R3-S3 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.2 < 22.2R3-S3"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.3 < 22.3R3-S1 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.3 < 22.3R3-S1"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.4 < 22.4R3 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.4 < 22.4R3"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 23.2 < 23.2R1-S2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 23.2 < 23.2R1-S2"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 23.2 < 23.2R2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 23.2 < 23.2R2"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Evolved Search vendor "Juniper Networks" for product "Junos OS Evolved"				>= 21.4-EVO < 21.4R3-S5-EVO Search vendor "Juniper Networks" for product "Junos OS Evolved" and version " >= 21.4-EVO < 21.4R3-S5-EVO"		en		Affected

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