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.
Metrics
Affected Vendors & Products
No advisories yet.
Solution
The following software releases have been updated to resolve this specific issue: Junos OS: 24.4R1-S3, 24.4R2, 25.2R1 and all subsequent releases.
Workaround
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.
Thu, 09 Oct 2025 19:15:00 +0000
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Thu, 09 Oct 2025 16:00:00 +0000
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Description | 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. | |
Title | Junos OS: SRX4700: When forwarding-options sampling is enabled any traffic destined to the RE will cause the forwarding line card to crash and restart | |
Weaknesses | CWE-908 | |
References |
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Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2025-10-09T19:00:04.954Z
Reserved: 2025-09-23T18:19:06.955Z
Link: CVE-2025-59964

Updated: 2025-10-09T18:59:58.500Z

Status : Received
Published: 2025-10-09T16:15:46.443
Modified: 2025-10-09T16:15:46.443
Link: CVE-2025-59964

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