CVE-2025-52964 – “Juniper Networks Junos OS and Junos OS Evolved Reachable Assertion Denial of Service Vulnerability”

CVE ID : CVE-2025-52964

Published : July 11, 2025, 3:15 p.m. | 59 minutes ago

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.

Severity: 6.5 | MEDIUM

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