Juniper Junos OS Evolved prior 24.4R2-EVO /usr/bin/cfmman resource consumption

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6.3	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Juniper Junos OS Evolved and classified as critical. The affected element is an unknown function of the file /usr/bin/cfmman. Performing a manipulation results in resource consumption. This vulnerability is cataloged as CVE-2025-52961. The attack must originate from the local network. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Juniper Junos OS Evolved. This affects an unknown part of the file /usr/bin/cfmman. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

An Uncontrolled Resource Consumption vulnerability in the Connectivity Fault Management (CFM) daemon and the Connectivity Fault Management Manager (cfmman) of Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). An attacker on an adjacent device sending specific valid traffic can cause cfmd to spike the CPU to 100% and cfmman's memory to leak, eventually to cause the FPC crash and restart. Continued receipt and processes of these specific valid packets will sustain the Denial of Service (DoS) condition. An indicator of compromise is to watch for an increase in cfmman memory rising over time by issuing the following command and evaluating the RSS number. If the RSS is growing into GBs then consider restarting the device to temporarily clear memory. user@device> show system processes node fpc<num> detail | match cfmman Example: show system processes node fpc0 detail | match cfmman F S UID PID PPID PGID SID C PRI NI ADDR SZ WCHAN RSS PSR STIME TTY TIME CMD 4 S root 15204 1 15204 15204 0 80 0 - 90802 - 113652 4 Sep25 ? 00:15:28 /usr/bin/cfmman -p /var/pfe -o -c /usr/conf/cfmman-cfg-active.xml This issue affects Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016: * from 23.2R1-EVO before 23.2R2-S4-EVO, * from 23.4 before 23.4R2-S4-EVO, * from 24.2 before 24.2R2-EVO, * from 24.4 before 24.4R1-S2-EVO, 24.4R2-EVO. This issue does not affect Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 before 23.2R1-EVO.

The advisory is shared at supportportal.juniper.net. This vulnerability is uniquely identified as CVE-2025-52961 since 06/23/2025. The exploitability is told to be easy. The attack needs to be done within the local network. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 269751 (Juniper Junos OS Vulnerability (JSA103144)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 23.2R1-EVO, 23.2R2-S4-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-S2-EVO or 24.4R2-EVO eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (269751) and CERT Bund (WID-SEC-2025-2238). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Juniper JUNOS

Productinfo

Type

Router Operating System

Vendor

Juniper

Name

Junos OS Evolved

License

commercial

Website

Vendor: https://www.juniper.net/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (juniper): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 269751
Nessus Name: Juniper Junos OS Vulnerability (JSA103144)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Junos OS Evolved 23.2R1-EVO/23.2R2-S4-EVO/23.4R2-S4-EVO/24.2R2-EVO/24.4R1-S2-EVO/24.4R2-EVO

Timelineinfo

06/23/2025 CVE reserved
10/09/2025 +108 days Advisory disclosed
10/09/2025 +0 days VulDB entry created
01/24/2026 +107 days VulDB entry last update

Sourcesinfo

Vendor: juniper.net

Advisory: JSA103144
Status: Confirmed

CVE: CVE-2025-52961 (🔒)
GCVE (CVE): GCVE-0-2025-52961
GCVE (VulDB): GCVE-100-327729
CERT Bund: WID-SEC-2025-2238 - Juniper JUNOS OS, Space, OS Evolved: Mehrere Schwachstellen

Entryinfo

Created: 10/09/2025 18:36
Updated: 01/24/2026 12:05
Changes: 10/09/2025 18:36 (81), 10/09/2025 18:37 (2), 10/09/2025 19:35 (2), 10/09/2025 20:05 (7), 01/24/2026 12:05 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.