Juniper Junos OS prior 22.1R2 on MX Packet Forwarding Engine unusual condition

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Juniper Junos OS on MX. This affects an unknown function of the component Packet Forwarding Engine. The manipulation results in unusual condition. This vulnerability is reported as CVE-2023-28976. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Juniper Junos OS on MX (Router Operating System). It has been classified as critical. Affected is an unknown function of the component Packet Forwarding Engine. The manipulation with an unknown input leads to a unusual condition vulnerability. CWE is classifying the issue as CWE-754. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product. This is going to have an impact on availability. CVE summarizes:

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). If specific traffic is received on MX Series and its rate exceeds the respective DDoS protection limit the ingress PFE will crash and restart. Continued receipt of this traffic will create a sustained DoS condition. This issue affects Juniper Networks Junos OS on MX Series: All versions prior to 19.1R3-S10; 19.2 versions prior to 19.2R3-S7; 19.3 versions prior to 19.3R3-S8; 19.4 versions prior to 19.4R3-S11; 20.2 versions prior to 20.2R3-S5; 20.4 versions prior to 20.4R3-S6; 21.1 versions prior to 21.1R3-S5; 21.2 versions prior to 21.2R3-S4; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R2.

The weakness was disclosed 04/18/2023 as JSA70601. The advisory is shared for download at supportportal.juniper.net. This vulnerability is traded as CVE-2023-28976 since 03/29/2023. There are neither technical details nor an exploit publicly available.

Upgrading to version 19.1R3-S1, 19.2, 19.2R3-S7, 19.3, 19.3R3-S8, 19.4, 19.4R3-S1, 20.2, 20.2R3-S5, 20.4, 20.4R3-S6, 21.1, 21.1R3-S5, 21.2, 21.2R3-S4, 21.3, 21.3R3, 21.4, 21.4R3, 22.1 or 22.1R2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-32594). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (Juniper Networks, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Unusual condition
CWE: CWE-754
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Junos OS 19.1R3-S1/19.2/19.2R3-S7/19.3/19.3R3-S8/19.4/19.4R3-S1/20.2/20.2R3-S5/20.4/20.4R3-S6/21.1/21.1R3-S5/21.2/21.2R3-S4/21.3/21.3R3/21.4/21.4R3/22.1/22.1R2

Timelineinfo

03/29/2023 🔍
04/18/2023 +20 days 🔍
04/18/2023 +0 days 🔍
12/08/2025 +964 days 🔍

Sourcesinfo

Vendor: juniper.net

Advisory: JSA70601
Status: Confirmed

CVE: CVE-2023-28976 (🔍)
GCVE (CVE): GCVE-0-2023-28976
GCVE (VulDB): GCVE-100-226212
EUVD: 🔍

Entryinfo

Created: 04/18/2023 09:04
Updated: 12/08/2025 00:41
Changes: 04/18/2023 09:04 (51), 12/08/2025 00:41 (16)
Complete: 🔍
Cache ID: 216::103

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