Juniper Junos OS/Junos OS Evolved Packet Forwarding Engine improper check or handling of exceptional conditions

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Juniper Junos OS and Junos OS Evolved and classified as critical. The affected element is an unknown function of the component Packet Forwarding Engine. Executing a manipulation can lead to improper check or handling of exceptional conditions. This vulnerability is registered as CVE-2024-21593. The attack requires access to the local network. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Junos OS and Junos OS Evolved (the affected version is unknown). It has been declared as critical. This vulnerability affects an unknown code of the component Packet Forwarding Engine. The manipulation with an unknown input leads to a improper check or handling of exceptional conditions vulnerability. The CWE definition for the vulnerability is CWE-703. The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product. As an impact it is known to affect availability. CVE summarizes:

An Improper Check or Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). If an attacker sends a specific MPLS packet, which upon processing, causes an internal loop, that leads to a PFE crash and restart. Continued receipt of these packets leads to a sustained Denial of Service (DoS) condition. Circuit cross-connect (CCC) needs to be configured on the device for it to be affected by this issue. This issue only affects MX Series with MPC10, MPC11, LC9600, and MX304. This issue affects: Juniper Networks Junos OS 21.4 versions from 21.4R3 earlier than 21.4R3-S5; 22.2 versions from 22.2R2 earlier than 22.2R3-S2; 22.3 versions from 22.3R1 earlier than 22.3R2-S2; 22.3 versions from 22.3R3 earlier than 22.3R3-S1 22.4 versions from 22.4R1 earlier than 22.4R2-S2, 22.4R3; 23.2 versions earlier than 23.2R1-S1, 23.2R2.

The advisory is available at supportportal.juniper.net. This vulnerability was named CVE-2024-21593 since 12/27/2023. The exploitation appears to be easy. The attack needs to be initiated within the local network. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

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: 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 Networks, Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Improper check or handling of exceptional conditions
CWE: CWE-703
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: 🔍

Timelineinfo

12/27/2023 🔍
04/12/2024 +106 days 🔍
04/12/2024 +0 days 🔍
01/23/2026 +651 days 🔍

Sourcesinfo

Vendor: juniper.net

Advisory: JSA75732
Status: Confirmed

CVE: CVE-2024-21593 (🔍)
GCVE (CVE): GCVE-0-2024-21593
GCVE (VulDB): GCVE-100-260530

Entryinfo

Created: 04/12/2024 17:30
Updated: 01/23/2026 18:55
Changes: 04/12/2024 17:30 (62), 05/22/2024 08:29 (1), 01/23/2026 18:55 (14)
Complete: 🔍
Cache ID: 216::103

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