CVE-2025-52964

/// Technical description

A Reachable Assertion vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

When the device receives a specific BGP UPDATE packet, the rpd crashes and restarts. Continuous receipt of this specific packet will cause a sustained DoS condition.

For the issue to occur, BGP multipath with "pause-computation-during-churn" must be configured on the device, and the attacker must send the paths via a BGP UPDATE from a established BGP peer.

This issue affects:

Junos OS:

* All versions before 21.4R3-S7,

* from 22.3 before 22.3R3-S3,

* from 22.4 before 22.4R3-S5,

* from 23.2 before 23.2R2,

* from 23.4 before 23.4R2.

Junos OS Evolved:

* All versions before 21.4R3-S7-EVO,

* from 22.3 before 22.3R3-S3-EVO,

* from 22.4 before 22.4R3-S5-EVO,

* from 23.2 before 23.2R2-EVO,

* from 23.4 before 23.4R2-EVO.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References