Vulnerability Description
A vulnerability in the DHCPv6 feature of the Cisco Nexus 9000 Series Fabric Switches in Application-Centric Infrastructure (ACI) Mode could allow an unauthenticated, remote attacker to cause the device to run low on system memory, which could result in a Denial of Service (DoS) condition on an affected system. The vulnerability is due to improper memory management when DHCPv6 packets are received on an interface of the targeted device. An attacker could exploit this vulnerability by sending a high number of malicious DHCPv6 packets to be processed by an affected device. A successful exploit could allow the attacker to cause the system to run low on memory, which could cause an eventual reboot of an affected device. The vulnerability only applies to IPv6 protocol packets and not for IPv4 protocol packets. This vulnerability affects Cisco Nexus 9000 Series Fabric Switches in ACI Mode running software version 13.0(1k). The vulnerability can only be exploited when unicast routing is enabled on the Bridge Domain (BD). DHCP and DHCP relay do not have to be configured for the vulnerability to be exploited. Cisco Bug IDs: CSCvg38918.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Nx-Os | 13.0\(1k\) |
| Cisco | Nexus 92160Yc-X | - |
| Cisco | Nexus 92304Qc | - |
| Cisco | Nexus 9236C | - |
| Cisco | Nexus 9272Q | - |
| Cisco | Nexus 93108Tc-Ex | - |
| Cisco | Nexus 93120Tx | - |
| Cisco | Nexus 93128Tx | - |
| Cisco | Nexus 93180Yc-Ex | - |
| Cisco | Nexus 9332Pq | - |
| Cisco | Nexus 9372Px | - |
| Cisco | Nexus 9372Tx | - |
| Cisco | Nexus 9396Px | - |
| Cisco | Nexus 9396Tx | - |
| Cisco | Nexus 9504 | - |
| Cisco | Nexus 9508 | - |
| Cisco | Nexus 9516 | - |
| Cisco | Nexus N9K-C9508-Fm-R | - |
| Cisco | Nexus N9K-X9636C-R | - |
| Cisco | Nexus N9K-X9636Q-R | - |
Related Weaknesses (CWE)
References
- http://www.securitytracker.com/id/1041348Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-2018Vendor Advisory
- http://www.securitytracker.com/id/1041348Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-2018Vendor Advisory
FAQ
What is CVE-2018-0372?
CVE-2018-0372 is a vulnerability with a CVSS score of 7.5 (HIGH). A vulnerability in the DHCPv6 feature of the Cisco Nexus 9000 Series Fabric Switches in Application-Centric Infrastructure (ACI) Mode could allow an unauthenticated, remote attacker to cause the devic...
How severe is CVE-2018-0372?
CVE-2018-0372 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-0372?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Nx-Os, Cisco Nexus 92160Yc-X, Cisco Nexus 92304Qc, Cisco Nexus 9236C, Cisco Nexus 9272Q.