SB2025101389 - Use of uninitialized resource in Juniper Junos OS

Security Bulletin ID SB2025101389

Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 security vulnerability.

1) Use of uninitialized resource (CVE-ID: CVE-2025-59964)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to use of uninitialized resource error in the Packet Forwarding Engine (PFE). A remote non-authenticated attacker can 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) attack.

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.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2025-10-Security-Bulletin-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-CVE-2025-59964