Juniper Junos OS up to 23.4R1 on MX Packet Forwarding Engine null pointer dereference

Summaryinfo

A vulnerability described as problematic has been identified in Juniper Junos OS up to 23.4R1 on MX. The affected element is an unknown function of the component Packet Forwarding Engine. The manipulation results in null pointer dereference. This vulnerability is known as CVE-2024-47496. Attacking locally is a requirement. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Juniper Junos OS up to 23.4R1 on MX. Affected is an unknown code block of the component Packet Forwarding Engine. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS allows a local, low-privileged attacker to cause a Denial-of-Service (DoS). When a specific command is executed, the pfe crashes. This will cause traffic forwarding to be interrupted until the system self-recovers. Repeated execution will create a sustained DoS condition. This issue only affects MX Series devices with Line cards MPC1-MPC9. This issue affects: Junos OS on MX Series: * All versions before 21.4R3-S9, * from 22.2 before 22.2R3-S5,  * from 22.3 before 22.3R3-S4, * from 22.4 before 22.4R3-S2, * from 23.2 before 23.2R2-S1, * from 23.4 before 23.4R2.

The advisory is available at supportportal.juniper.net. This vulnerability is traded as CVE-2024-47496 since 09/25/2024. The exploitability is told to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available.

Upgrading to version 21.4R3-S9, 22.2R3-S5, 22.3R3-S4, 22.4R3-S2, 23.2R2-S1 or 23.4R2 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS

Version

• 21.4R3-S8
• 22.2R3-S4
• 22.3R3-S3
• 22.4R3-S1
• 23.2R2-S0
• 23.4R1

License

• commercial

Website

• Vendor: https://www.juniper.net/

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