Executive Summary



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Informations
Name CVE-2025-21595 First vendor Publication 2025-04-09
Vendor Cve Last vendor Modification 2025-04-09

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 6.5
Base Score 6.5 Environmental Score 6.5
impact SubScore 3.6 Temporal Score 6.5
Exploitabality Sub Score 2.8
 
Attack Vector Adjacent Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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,Â
* 22.3 versions before 22.3R3-S1,Â
* 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,Â
* 22.3-EVO versions before 22.3R3-S1-EVO,Â

* 22.4-EVO versions before 22.4R3-EVO.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21595

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-401 Failure to Release Memory Before Removing Last Reference ('Memory Leak')

Sources (Detail)

https://supportportal.juniper.net/JSA96450
Source Url

Alert History

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0
Date Informations
2025-05-27 02:52:08
  • First insertion