CVE-2024-21605

Summary

An Exposure of Resource to Wrong Sphere vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX 300 Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).

Specific valid link-local traffic is not blocked on ports in STP blocked state but is instead sent to the control plane of the device. This leads to excessive resource consumption and in turn severe impact on all control and management protocols of the device.

This issue affects Juniper Networks Junos OS:

  • 21.2 version 21.2R3-S3 and later versions earlier than 21.2R3-S6;
  • 22.1 version 22.1R3 and later versions earlier than 22.1R3-S4;
  • 22.2 version

22.2R2

and later versions earlier than 22.2R3-S2;

  • 22.3 version

22.3R2

and later versions earlier than 22.3R3-S1;

  • 22.4 versions earlier than 22.4R2-S2, 22.4R3;
  • 23.2 versions earlier than 23.2R1-S1, 23.2R2.

This issue does not affect Juniper Networks Junos OS 21.4R1 and later versions of 21.4.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS21.2R3-S3 < 21.2R3-S6affected
Juniper NetworksJunos OS22.1R3 < 22.1R3-S4affected
Juniper NetworksJunos OS22.2R2 < 22.2R3-S2affected
Juniper NetworksJunos OS22.3R2 < 22.3R3-S1affected
Juniper NetworksJunos OS22.4 < 22.4R2-S2, 22.4R3affected
Juniper NetworksJunos OS23.2 < 23.2R1-S1, 23.2R2affected
Juniper NetworksJunos OS21.4 < 21.4*unaffected

Weaknesses

  • CWE-668: CWE-668 Exposure of Resource to Wrong Sphere
  • Denial of Service

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References