CVE-2023-44193

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-401

Affected software

VendorProductVersions
Juniper NetworksJunos OS< 20.4R3-S7; >= 21.1, < 21.1R3-S5; >= 21.2, < 21.2R3-S4; >= 21.3, < 21.3R3-S4; >= 21.4, < 21.4R3-S3; >= 22.1, < 22.1R3-S1; >= 22.2, < 22.2R2-S1, 22.2R3; >= 22.3, < 22.3R1-S2, 22.3R2

References

Timeline

Published
Oct 13, 2023
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2023

CVE-2023-441947.8An Incorrect Default Permissions vulnerability in Juniper Networks Junos OS allows an unauthenticated attacker with local access to the deviCVE-2023-441955.3An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in the NetworkStack agent daemon (nsagentd) of Juniper CVE-2023-441966.5An Improper Check for Unusual or Exceptional Conditions in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS Evolved on PTX100CVE-2023-441977.5An Out-of-Bounds Write vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthCVE-2023-441987.5An Improper Check for Unusual or Exceptional Conditions vulnerability in the SIP ALG of Juniper Networks Junos OS on SRX Series and MX SerieCVE-2023-441997.5An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on CVE-2023-44207.4A remote unprivileged attacker can intercept the communication via e.g. Man-In-The-Middle, due to the absence of Transport Layer Security (TCVE-2023-442015.5An Incorrect Permission Assignment for Critical Resource vulnerability in a specific file of Juniper Networks Junos OS and Junos OS Evolved CVE-2023-442036.5An Improper Check or Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on CVE-2023-442046.5An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos CVE-2023-442055.3Sensitive information disclosure due to improper authorization. The following products are affected: Acronis Cyber Protect 15 (Linux, WindowCVE-2023-442069.1Sensitive information disclosure and manipulation due to improper authorization. The following products are affected: Acronis Cyber Protect
CVE-2023-44193: Medium severity, CVSS 5.5 | Vulnix