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Junos Os Evolved EUVDEUVD-2025-21152

| CVE-2025-52964 MEDIUM
Reachable Assertion (CWE-617)
2025-07-11 sirt@juniper.net
Juniper Denial Of Service Junos Os Evolved Junos
6.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Patch available
Apr 16, 2026 - 05:29 EUVD
21.4R3-S7-EVO,23.2R2-EVO,22.4R3-S5-EVO
EUVD ID Assigned
Mar 16, 2026 - 08:18 euvd
EUVD-2025-21152
Analysis Generated
Mar 16, 2026 - 08:18 vuln.today
CVE Published
Jul 11, 2025 - 15:15 nvd
MEDIUM 6.5

DescriptionCVE.org

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.

Analysis

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.

Technical ContextAI

A denial of service vulnerability allows an attacker to disrupt the normal functioning of a system, making it unavailable to legitimate users. This vulnerability is classified as Reachable Assertion (CWE-617).

RemediationAI

Implement rate limiting and input validation. Use timeout mechanisms for resource-intensive operations. Deploy DDoS protection where applicable.

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An Improper Privilege Management vulnerability in the gRPC framework, used by the Juniper Extension Toolkit (JET) API on
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A Buffer Access with Incorrect Length Value vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos
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An Allocation of Resources Without Limits or Throttling vulnerability in the kernel of Juniper Networks Junos OS Evolved

Same weakness CWE-617 – Reachable Assertion

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Same technique Denial Of Service

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EUVD-2025-21152 vulnerability details – vuln.today
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