CVE-2018-0063 : Security Advisory and Response
Discover the impact of CVE-2018-0063, a vulnerability in Junos OS 17.3R3 allowing ARP flood to the management interface, depleting next-hop limits for IRIs, leading to a DoS situation. Learn about affected systems, exploitation mechanism, and mitigation steps.
A vulnerability in Junos OS 17.3R3 allows a flood of ARP requests to the management interface, depleting the next-hop limit for Internal routing interfaces (IRIs) and causing a denial of service (DoS) situation.
Understanding CVE-2018-0063
This CVE involves a flaw in Junos OS 17.3R3 related to the IP next-hop index database, impacting the management interface.
What is CVE-2018-0063?
The vulnerability permits a flood of ARP requests to the management interface, depleting the next-hop limit for private Internal routing interfaces (IRIs).
The Impact of CVE-2018-0063
- The depletion of the IRI next-hop limit can lead to a sustained denial of service (DoS) situation.
- Only affects Junos OS 17.3R3 and the management interface, not transit traffic through FPCs.
Technical Details of CVE-2018-0063
This section provides detailed technical information about the vulnerability.
Vulnerability Description
- Error message: %KERN-4: Nexthop index allocation failed: private index space exhausted.
Affected Systems and Versions
- Product: Junos OS
- Vendor: Juniper Networks
- Affected Version: 17.3R3
Exploitation Mechanism
- Low attack complexity
- Attack vector: Adjacent network
- Availability impact: High
Mitigation and Prevention
Learn how to mitigate and prevent the exploitation of CVE-2018-0063.
Immediate Steps to Take
- Update to software releases 17.3R3-S1 and newer to recover from private index space exhaustion.
Long-Term Security Practices
- Regularly monitor and update Junos OS to the latest versions.
- Implement network segmentation and access controls.
Patching and Updates
- Apply patches provided by Juniper Networks to address the vulnerability.