CVE-2023-44193

Summary

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 Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS0 < 20.4R3-S7affected
Juniper NetworksJunos OS21.1 < 21.1R3-S5affected
Juniper NetworksJunos OS21.2 < 21.2R3-S4affected
Juniper NetworksJunos OS21.3 < 21.3R3-S4affected
Juniper NetworksJunos OS21.4 < 21.4R3-S3affected
Juniper NetworksJunos OS22.1 < 22.1R3-S1affected
Juniper NetworksJunos OS22.2 < 22.2R2-S1, 22.2R3affected
Juniper NetworksJunos OS22.3 < 22.3R1-S2, 22.3R2affected

Weaknesses

  • CWE-401: CWE-401 Improper Release of Memory Before Removing Last Reference
  • Denial of Service (DoS)

Workarounds

This issue can be avoided by disabling CFM MIP functionality.

[ protocols oam ethernet connectivity-fault-management maintenance-domain mip-half-function none ]

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References