CVE-2018-0056

MX Series: L2ALD daemon may crash if a duplicate MAC is learned by two different interfaces

Severity Score

5.3

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

If a duplicate MAC address is learned by two different interfaces on an MX Series device, the MAC address learning function correctly flaps between the interfaces. However, the Layer 2 Address Learning Daemon (L2ALD) daemon might crash when attempting to delete the duplicate MAC address when the particular entry is not found in the internal MAC address table. This issue only occurs on MX Series devices with l2-backhaul VPN configured. No other products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series.

Si una dirección MAC duplicada es aprendida por dos interfaces diferentes en un dispositivo MX Series, la función de aprendizaje de direcciones MAC realiza flaps correctamente entre las interfaces. Sin embargo, el demonio L2ALD (Layer 2 Address Learning Daemon) podría cerrarse inesperadamente al intentar eliminar la dirección MAC duplicada cuando esa entrada en concreto no se encuentra en la tabla interna de direcciones MAC. Este problema solo ocurre en los dispositivos MX Series con la VPN l2-backhaul configurada. No hay ningún otro producto o plataforma que se vea afectado por este problema. Las versiones afectadas de Juniper Networks Junos OS son: 15.1 en versiones anteriores a la 15.1R7-S1 en MX Series; 16.1 en versiones anteriores a la 16.1R4-S12, 16.1R6-S6 en MX Series; 16.2 en versiones anteriores a la 16.2R2-S7 en MX Series; 17.1 en versiones anteriores a la 17.1R2-S9 en MX Series; 17.2 en versiones anteriores a la 17.2R1-S7, 17.2R2-S6 en MX Series; 17.3 en versiones anteriores a la 17.3R2-S4, 17.3R3-S1 en MX Series; 17.4 en versiones anteriores a la 17.4R1-S5 en MX Series y 18.1 en versiones anteriores a la 18.1R2 en MX Series.

*Credits: N/A

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-11-16 CVE Reserved
2018-10-10 CVE Published
2024-08-19 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (2)

URL	Tag	Source
http://www.securitytracker.com/id/1041857	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://kb.juniper.net/JSA10890	2019-10-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		-		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		f2		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		f3		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		f4		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		f5		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		f6		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		r1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		r2		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		r3		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		r4		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		r5		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				15.1 Search vendor "Juniper" for product "Junos" and version "15.1"		r6		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				16.1 Search vendor "Juniper" for product "Junos" and version "16.1"		-		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				16.1 Search vendor "Juniper" for product "Junos" and version "16.1"		r1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				16.1 Search vendor "Juniper" for product "Junos" and version "16.1"		r2		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				16.1 Search vendor "Juniper" for product "Junos" and version "16.1"		r3		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				16.2 Search vendor "Juniper" for product "Junos" and version "16.2"		-		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				16.2 Search vendor "Juniper" for product "Junos" and version "16.2"		r1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.1 Search vendor "Juniper" for product "Junos" and version "17.1"		-		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.1 Search vendor "Juniper" for product "Junos" and version "17.1"		r1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.2 Search vendor "Juniper" for product "Junos" and version "17.2"		-		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.3 Search vendor "Juniper" for product "Junos" and version "17.3"		-		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.3 Search vendor "Juniper" for product "Junos" and version "17.3"		r1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.4 Search vendor "Juniper" for product "Junos" and version "17.4"		-		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.4 Search vendor "Juniper" for product "Junos" and version "17.4"		r1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				18.1 Search vendor "Juniper" for product "Junos" and version "18.1"		-		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				18.1 Search vendor "Juniper" for product "Junos" and version "18.1"		r1		Affected