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CVE-2023-44193

Status: ModifiedMedium (5.5)—

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:

Technical details traces, logs and code from the original report
  *  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.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

CWEs

References

Raw JSON (NVD)

Show
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      "value": "\nAn 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).\n\nOn 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.\n\nThis issue affects:\n\nJuniper Networks Junos OS on MX Series:\n\n\n\n  *  All versions prior to 20.4R3-S7;\n  *  21.1 versions prior to 21.1R3-S5;\n  *  21.2 versions prior to 21.2R3-S4;\n  *  21.3 versions prior to 21.3R3-S4;\n  *  21.4 versions prior to 21.4R3-S3;\n  *  22.1 versions prior to 22.1R3-S1;\n  *  22.2 versions prior to 22.2R2-S1, 22.2R3;\n  *  22.3 versions prior to 22.3R1-S2, 22.3R2.\n\n\n\n\n\n\n"
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