Juniper Junos CMLC Daemon Broadcast Storm resource consumption

Summaryinfo

A vulnerability categorized as problematic has been discovered in Juniper Junos. This impacts an unknown function of the component CMLC Daemon. Executing a manipulation as part of Broadcast can lead to resource consumption (Storm). This vulnerability is registered as CVE-2019-0046. The attack requires access to the local network. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Juniper Junos (Router Operating System) (affected version unknown) and classified as problematic. This vulnerability affects an unknown functionality of the component CMLC Daemon. The manipulation as part of a Broadcast leads to a resource consumption vulnerability (Storm). The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

A vulnerability in the pfe-chassisd Chassis Manager (CMLC) daemon of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) to the EX4300 when specific valid broadcast packets create a broadcast storm condition when received on the me0 interface of the EX4300 Series device. A reboot of the device is required to restore service. Continued receipt of these valid broadcast packets will create a sustained Denial of Service (DoS) against the device. Affected releases are Juniper Networks Junos OS: 16.1 versions above and including 16.1R1 prior to 16.1R7-S5; 17.1 versions prior to 17.1R3; 17.2 versions prior to 17.2R3; 17.3 versions prior to 17.3R3-S2; 17.4 versions prior to 17.4R2; 18.1 versions prior to 18.1R3; 18.2 versions prior to 18.2R2.

The weakness was published 07/11/2019 (Website). The advisory is shared for download at kb.juniper.net. This vulnerability was named CVE-2019-0046 since 10/11/2018. The attack can only be done within the local network. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

Similar entries are available at VDB-137744, VDB-137743 and VDB-137742. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos

License

• commercial

Website

• Vendor: https://www.juniper.net/

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Once again VulDB remains the best source for vulnerability data.

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