A vulnerability, which was classified as problematic, has been found in Juniper Junos up to 17.3R3 (Router Operating System). Affected by this issue is an unknown functionality of the component Management Interface. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

A vulnerability in the IP next-hop index database in Junos OS 17.3R3 may allow a flood of ARP requests, sent to the management interface, to exhaust the private Internal routing interfaces (IRIs) next-hop limit. Once the IRI next-hop database is full, no further next hops can be learned and existing entries cannot be cleared, leading to a sustained denial of service (DoS) condition. An indicator of compromise for this issue is the report of the following error message: %KERN-4: Nexthop index allocation failed: private index space exhausted This issue only affects the management interface, and does not impact regular transit traffic through the FPCs. This issue also only affects Junos OS 17.3R3. No prior versions of Junos OS are affected by this issue. Affected releases are Juniper Networks Junos OS: 17.3R3.

The bug was discovered 10/10/2018. The weakness was published 10/10/2018 (Website). The advisory is available at kb.juniper.net. This vulnerability is handled as CVE-2018-0063 since 11/15/2017. The exploitation is known to be easy. The attack can only be done within the local network. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/25/2023).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Similar entries are available at 125207, 125209 and 125208.

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Type

• Router Operating System

Vendor

• Juniper

Name

• Junos

Version

• 17.3R3

License

• commercial

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CPE 2.2info

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