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Unrated severityNVD Advisory· Published Oct 12, 2023· Updated Sep 17, 2024

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

CVE-2023-44193

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.

Affected products

2
  • Juniper Networks/Junosllm-fuzzy2 versions
    <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 or 22.2R3, >=22.3 <22.3R1-S2 or 22.3R2+ 1 more
    • (no CPE)range: <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 or 22.2R3, >=22.3 <22.3R1-S2 or 22.3R2
    • (no CPE)range: 0

Patches

Vulnerability mechanics

References

1

News mentions

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