Juniper Junos OS up to 24.2R1-S1 Berkeley Packet Filter exceptional condition

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Juniper Junos OS up to 24.2R1-S1. Impacted is an unknown function of the component Berkeley Packet Filter. The manipulation leads to exceptional condition. This vulnerability is referenced as CVE-2025-52948. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Juniper Junos OS up to 24.2R1-S1. This issue affects an unknown code of the component Berkeley Packet Filter. The manipulation with an unknown input leads to a exceptional condition vulnerability. Using CWE to declare the problem leads to CWE-755. The product does not handle or incorrectly handles an exceptional condition. Impacted is availability. The summary by CVE is:

An Improper Handling of Exceptional Conditions vulnerability in Berkeley Packet Filter (BPF) processing of Juniper Networks Junos OS allows an attacker, in rare cases, sending specific, unknown traffic patterns to cause the FPC and system to crash and restart. BPF provides a raw interface to data link layers in a protocol independent fashion. Internally within the Junos kernel, due to a rare timing issue (race condition), when a BPF instance is cloned, the newly created interface causes an internal structure leakage, leading to a system crash. The precise content and timing of the traffic patterns is indeterminate, but has been seen in a lab environment multiple times. This issue is more likely to occur when packet capturing is enabled.  See required configuration below. This issue affects Junos OS:  * all versions before 21.2R3-S9,  * from 21.4 before 21.4R3-S10,  * from 22.2 before 22.2R3-S6,  * from 22.4 before 22.4R3-S7,  * from 23.2 before 23.2R2-S3,  * from 23.4 before 23.4R2-S3,  * from 24.2 before 24.2R1-S1, 24.2R2.

The advisory is shared at supportportal.juniper.net. The identification of this vulnerability is CVE-2025-52948 since 06/23/2025. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/24/2026).

The vulnerability scanner Nessus provides a plugin with the ID 241662 (Juniper Junos OS Vulnerability (JSA100052)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 21.2R3-S9, 21.4R3-S10, 22.2R3-S6, 22.4R3-S7, 23.2R2-S3, 23.4R2-S3, 24.2R1-S1 or 24.2R2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (241662), EUVD (EUVD-2025-21153) and CERT Bund (WID-SEC-2025-1519). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Juniper MX Series
  • Juniper JUNOS
  • Juniper SRX Series
  • Juniper Security Director
  • Juniper Junos Space

Productinfo

Type

Vendor

Name

Version

License

Website

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: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.9
CNA Vector (juniper): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Exceptional condition
CWE: CWE-755
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 241662
Nessus Name: Juniper Junos OS Vulnerability (JSA100052)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Junos OS 21.2R3-S9/21.4R3-S10/22.2R3-S6/22.4R3-S7/23.2R2-S3/23.4R2-S3/24.2R1-S1/24.2R2

Timelineinfo

06/23/2025 CVE reserved
07/11/2025 +18 days Advisory disclosed
07/11/2025 +0 days VulDB entry created
01/24/2026 +197 days VulDB entry last update

Sourcesinfo

Vendor: juniper.net

Advisory: JSA10005
Status: Confirmed

CVE: CVE-2025-52948 (🔒)
GCVE (CVE): GCVE-0-2025-52948
GCVE (VulDB): GCVE-100-316145
EUVD: 🔒
CERT Bund: WID-SEC-2025-1519 - Juniper JUNOS: Mehrere Schwachstellen ermöglichen Privilegieneskalation

Entryinfo

Created: 07/11/2025 20:15
Updated: 01/24/2026 06:03
Changes: 07/11/2025 20:15 (80), 07/12/2025 08:17 (2), 07/18/2025 23:19 (1), 10/12/2025 01:35 (7), 01/24/2026 06:03 (1)
Complete: 🔍
Cache ID: 216::103

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

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