CVE-2025-59964

Summary

A Use of Uninitialized Resource vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX4700 devices allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

When forwarding-options sampling is enabled, receipt of any traffic destined to the Routing Engine (RE) by the PFE line card leads to an FPC crash and restart, resulting in a Denial of Service (DoS).

Continued receipt and processing of any traffic leading to the RE by the PFE line card will create a sustained Denial of Service (DoS) condition to the PFE line card.

This issue affects Junos OS on SRX4700: 

  • from 24.4 before 24.4R1-S3, 24.4R2

This issue affects IPv4 and IPv6.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS24.4 < 24.4R1-S3, 24.4R2affected

Weaknesses

  • CWE-908: CWE-908: Use of Uninitialized Resource

Workarounds

To workaround this issue an administrator must block all traffic from the PFE line card to the Routing Engine (RE) until a fix can be taken. Even while under a persistent DoS attack the RE will continue to be accessible to administrators through non-PFE line card interfaces E.g. Console, FXP0.

ADP Enrichment

CISA ADP Vulnrichment

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

References