CVE-2024-21595

Summary

An Improper Validation of Syntactic Correctness of Input vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).

If an attacker sends high rate of specific ICMP traffic to a device with VXLAN configured, this causes a deadlock of the PFE and results in the device becoming unresponsive. A manual restart will be required to recover the device.

This issue only affects EX4100, EX4400, EX4600, QFX5000 Series devices.

This issue affects:

Juniper Networks Junos OS

  • 21.4R3 versions earlier than 21.4R3-S4;
  • 22.1R3 versions earlier than 22.1R3-S3;
  • 22.2R2 versions earlier than 22.2R3-S1;
  • 22.3 versions earlier than 22.3R2-S2, 22.3R3;
  • 22.4 versions earlier than 22.4R2;
  • 23.1 versions earlier than 23.1R2.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS21.4R3 < 21.4R3-S4affected
Juniper NetworksJunos OS22.1R3 < 22.1R3-S3affected
Juniper NetworksJunos OS22.2R2 < 22.2R3-S1affected
Juniper NetworksJunos OS22.3 < 22.3R2-S2, 22.3R3affected
Juniper NetworksJunos OS22.4 < 22.4R2affected
Juniper NetworksJunos OS23.1 < 23.1R2affected

Weaknesses

  • CWE-1286: CWE-1286 Improper Validation of Syntactic Correctness of Input
  • Denial of Service (DoS)

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References