medium
5.5
CWE
401
Advisory Published
Updated

CVE-2023-44193: Junos OS: MX Series: An FPC crash is observed when CFM is enabled in a VPLS scenario and a specific LDP related command is run

First published: Thu Oct 12 2023(Updated: )

An Improper Release of Memory Before Removing Last Reference vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a local, low privileged attacker to cause an FPC crash, leading to Denial of Service (DoS). On all Junos MX Series with MPC1 - MPC9, LC480, LC2101, MX10003, and MX80, when Connectivity-Fault-Management (CFM) is enabled in a VPLS scenario, and a specific LDP related command is run, an FPC will crash and reboot. Continued execution of this specific LDP command can lead to sustained Denial of Service condition. This issue affects: Juniper Networks Junos OS on MX Series: * All versions prior to 20.4R3-S7; * 21.1 versions prior to 21.1R3-S5; * 21.2 versions prior to 21.2R3-S4; * 21.3 versions prior to 21.3R3-S4; * 21.4 versions prior to 21.4R3-S3; * 22.1 versions prior to 22.1R3-S1; * 22.2 versions prior to 22.2R2-S1, 22.2R3; * 22.3 versions prior to 22.3R1-S2, 22.3R2.

Credit: sirt@juniper.net sirt@juniper.net

Affected SoftwareAffected VersionHow to fix
Juniper JUNOS<20.4
Juniper JUNOS=20.4
Juniper JUNOS=20.4-r1
Juniper JUNOS=20.4-r1-s1
Juniper JUNOS=20.4-r2
Juniper JUNOS=20.4-r2-s1
Juniper JUNOS=20.4-r2-s2
Juniper JUNOS=20.4-r3
Juniper JUNOS=20.4-r3-s1
Juniper JUNOS=20.4-r3-s2
Juniper JUNOS=20.4-r3-s3
Juniper JUNOS=20.4-r3-s4
Juniper JUNOS=20.4-r3-s5
Juniper JUNOS=20.4-r3-s6
Juniper JUNOS=21.1
Juniper JUNOS=21.1-r1
Juniper JUNOS=21.1-r1-s1
Juniper JUNOS=21.1-r2
Juniper JUNOS=21.1-r2-s1
Juniper JUNOS=21.1-r2-s2
Juniper JUNOS=21.1-r3
Juniper JUNOS=21.1-r3-s1
Juniper JUNOS=21.1-r3-s2
Juniper JUNOS=21.1-r3-s3
Juniper JUNOS=21.1-r3-s4
Juniper JUNOS=21.2
Juniper JUNOS=21.2-r1
Juniper JUNOS=21.2-r1-s1
Juniper JUNOS=21.2-r1-s2
Juniper JUNOS=21.2-r2
Juniper JUNOS=21.2-r2-s1
Juniper JUNOS=21.2-r2-s2
Juniper JUNOS=21.2-r3
Juniper JUNOS=21.2-r3-s1
Juniper JUNOS=21.2-r3-s2
Juniper JUNOS=21.2-r3-s3
Juniper JUNOS=21.3
Juniper JUNOS=21.3-r1
Juniper JUNOS=21.3-r1-s1
Juniper JUNOS=21.3-r1-s2
Juniper JUNOS=21.3-r2
Juniper JUNOS=21.3-r2-s1
Juniper JUNOS=21.3-r2-s2
Juniper JUNOS=21.3-r3
Juniper JUNOS=21.3-r3-s1
Juniper JUNOS=21.3-r3-s2
Juniper JUNOS=21.3-r3-s3
Juniper JUNOS=21.4
Juniper JUNOS=21.4-r1
Juniper JUNOS=21.4-r1-s1
Juniper JUNOS=21.4-r1-s2
Juniper JUNOS=21.4-r2
Juniper JUNOS=21.4-r2-s1
Juniper JUNOS=21.4-r2-s2
Juniper JUNOS=22.1-r1
Juniper JUNOS=22.1-r1-s1
Juniper JUNOS=22.1-r1-s2
Juniper JUNOS=22.1-r2
Juniper JUNOS=22.1-r2-s1
Juniper JUNOS=22.1-r2-s2
Juniper JUNOS=22.1-r3
Juniper JUNOS=22.2
Juniper JUNOS=22.2-r1
Juniper JUNOS=22.2-r1-s1
Juniper JUNOS=22.2-r1-s2
Juniper JUNOS=22.2-r2
Juniper JUNOS=22.3-r1
Juniper JUNOS=22.3-r1-s1
Juniper JUNOS=22.3-r1-s2
Juniper JUNOS=22.3-r2
Juniper Mx10003
Juniper Mx10004
Juniper Mx10008
Juniper Mx2008
Juniper Mx2010
Juniper Mx2020
Juniper Mx204
Juniper Mx240
Juniper Mx304
Juniper Mx480
Juniper Mx960

Remedy

The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S7, 21.1R3-S5, 21.2R3-S4, 21.3R3-S4, 21.4R3-S3, 22.1R3-S1, 22.2R2-S1, 22.2R3, 22.3R1-S2, 22.3R2, 22.4R1, and all subsequent releases.

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