FKIE_CVE-2025-21595
Vulnerability from fkie_nvd - Published: 2025-04-09 20:15 - Updated: 2025-04-11 15:40
Severity ?
Summary
A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause an FPC to crash, leading to Denial of Service (DoS).
On all Junos OS and Junos OS Evolved platforms, in an EVPN-VXLAN scenario, when specific ARP packets are received on an IPv4 network, or specific NDP packets are received on an IPv6 network, kernel heap memory leaks, which eventually leads to an FPC crash and restart.
This issue does not affect MX Series platforms.
Heap size growth on FPC can be seen using below command.
user@host> show chassis fpc
Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%)
Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer
0 Online 45 3 0 2 2 2 32768 19 0 <<<<<<< Heap increase in all fPCs
This issue affects Junos OS:
* All versions before 21.2R3-S7,
* 21.4 versions before 21.4R3-S4,
* 22.2 versions before 22.2R3-S1,
* 22.3 versions before 22.3R3-S1,
* 22.4 versions before 22.4R2-S2, 22.4R3.
and Junos OS Evolved:
* All versions before 21.2R3-S7-EVO,
* 21.4-EVO versions before 21.4R3-S4-EVO,
* 22.2-EVO versions before 22.2R3-S1-EVO,
* 22.3-EVO versions before 22.3R3-S1-EVO,
* 22.4-EVO versions before 22.4R3-EVO.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A Missing Release of Memory after Effective Lifetime\u00a0vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause an FPC to crash, leading to Denial of Service (DoS).\n\nOn all Junos OS and Junos OS Evolved platforms, in an EVPN-VXLAN scenario, when specific ARP packets are received on an IPv4 network, or specific NDP packets are received on an IPv6 network, kernel heap memory leaks, which eventually leads to an FPC crash and restart.\n\nThis issue does not affect MX Series platforms.\nHeap size growth on FPC can be seen using below command.\n\n\nuser@host\u003e show chassis fpc\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Temp CPU Utilization (%) CPU Utilization (%) Memory \u00a0 Utilization (%)\nSlot State \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 (C) Total Interrupt \u00a0 \u00a0 1min \u00a0 5min \u00a0 15min \u00a0 DRAM (MB) \u00a0 Heap \u00a0 Buffer\n\u00a0 0 Online \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 45 \u00a0 \u00a0 3 \u00a0 \u00a0 \u00a0 \u00a0 0 \u00a0 \u00a0 \u00a0 2 \u00a0 \u00a0 \u00a0 2 \u00a0 \u00a0 \u00a02 \u00a0 \u00a0 \u00a0 32768 \u00a0 \u00a0 \u00a019\u00a0 \u00a0 \u00a0 \u00a00\u2003\u003c\u003c\u003c\u003c\u003c\u003c\u003c Heap increase in all fPCs\n\n\nThis issue affects Junos OS:\n\n * All versions before 21.2R3-S7,\n * 21.4 versions before 21.4R3-S4,\n * 22.2 versions before 22.2R3-S1,\u00a0\n * 22.3 versions before 22.3R3-S1,\u00a0\n * 22.4 versions before 22.4R2-S2, 22.4R3.\n\n\nand Junos OS Evolved:\n\n * All versions before 21.2R3-S7-EVO,\n * 21.4-EVO versions before 21.4R3-S4-EVO,\n * 22.2-EVO versions before 22.2R3-S1-EVO,\u00a0\n * 22.3-EVO versions before 22.3R3-S1-EVO,\u00a0\n\n * 22.4-EVO versions before 22.4R3-EVO."
},
{
"lang": "es",
"value": "Una vulnerabilidad de falta de liberaci\u00f3n de memoria tras el tiempo de vida \u00fatil efectivo en el motor de reenv\u00edo de paquetes (PFE) de Juniper Networks Junos OS y Junos OS Evolved permite que un atacante adyacente no autenticado provoque el bloqueo de un FPC, lo que provoca una denegaci\u00f3n de servicio (DoS). En todas las plataformas Junos OS y Junos OS Evolved, en un escenario EVPN-VXLAN, al recibir paquetes ARP espec\u00edficos en una red IPv4 o paquetes NDP espec\u00edficos en una red IPv6, se producen fugas de memoria en el mont\u00f3n del kernel, lo que finalmente provoca el bloqueo y reinicio del FPC. Este problema no afecta a las plataformas de la serie MX. El crecimiento del tama\u00f1o del mont\u00f3n en FPC se puede observar con el siguiente comando. user@host\u0026gt; show chassis fpc Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%) Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer 0 Online 45 3 0 2 2 2 32768 19 0?\u0026lt;\u0026lt;\u0026lt;\u0026lt;\u0026lt;\u0026lt;\u0026lt; Heap increase in all fPCs Este problema afecta a Junos OS: * Todas las versiones anteriores a 21.2R3-S7, * Versiones 21.4 anteriores a 21.4R3-S4, * Versiones 22.2 anteriores a 22.2R3-S1, * Versiones 22.3 anteriores a 22.3R3-S1, * Versiones 22.4 anteriores a 22.4R2-S2, 22.4R3. y Junos OS Evolved: * Todas las versiones anteriores a 21.2R3-S7-EVO, * Versiones 21.4-EVO anteriores a 21.4R3-S4-EVO, * Versiones 22.2-EVO anteriores a 22.2R3-S1-EVO, * Versiones 22.3-EVO anteriores a 22.3R3-S1-EVO, * Versiones 22.4-EVO anteriores a 22.4R3-EVO."
}
],
"id": "CVE-2025-21595",
"lastModified": "2025-04-11T15:40:10.277",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "sirt@juniper.net",
"type": "Primary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "sirt@juniper.net",
"type": "Secondary"
}
]
},
"published": "2025-04-09T20:15:25.853",
"references": [
{
"source": "sirt@juniper.net",
"url": "https://supportportal.juniper.net/JSA96450"
}
],
"sourceIdentifier": "sirt@juniper.net",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-401"
}
],
"source": "sirt@juniper.net",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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