CVE-2024-21593

Summary

An Improper Check or Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).

If an attacker sends a specific MPLS packet, which upon processing, causes an internal loop, that leads to a PFE crash and restart. Continued receipt of these packets leads to a sustained Denial of Service (DoS) condition.

Circuit cross-connect (CCC) needs to be configured on the device for it to be affected by this issue.

This issue only affects MX Series with MPC10, MPC11, LC9600, and MX304.

This issue affects: Juniper Networks Junos OS 21.4 versions from 21.4R3 earlier than 21.4R3-S5; 22.2 versions from 22.2R2 earlier than 22.2R3-S2; 22.3 versions from 22.3R1 earlier than 22.3R2-S2; 22.3 versions from 22.3R3 earlier than 22.3R3-S1 22.4 versions from 22.4R1 earlier than 22.4R2-S2, 22.4R3; 23.2 versions earlier than 23.2R1-S1, 23.2R2.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS21.4R3 < 21.4R3-S5affected
Juniper NetworksJunos OS22.1unaffected
Juniper NetworksJunos OS22.2R2 < 22.2R3-S2affected
Juniper NetworksJunos OS22.3R1 < 22.3R2-S2affected
Juniper NetworksJunos OS22.3R3 < 22.3R3-S1affected
Juniper NetworksJunos OS22.4R1 < 22.4R2-S2, 22.4R3affected
Juniper NetworksJunos OS23.2 < 23.2R1-S1, 23.2R2affected

Weaknesses

  • CWE-703: CWE-703 Improper Check or Handling of Exceptional Conditions
  • Denial of Service (DoS)

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References