CVE-2018-0378: Cisco NX-OS Software for Nexus 5500, 5600, and 6000 Series Switches Precision Time Protocol Denial of Service Vulnerability
First published: Wed Oct 17 2018(Updated: )
A vulnerability in the Precision Time Protocol (PTP) feature of Cisco Nexus 5500, 5600, and 6000 Series Switches running Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a lack of protection against PTP frame flood attacks. An attacker could exploit this vulnerability by sending large streams of malicious IPv4 or IPv6 PTP traffic to the affected device. A successful exploit could allow the attacker to cause a DoS condition, impacting the traffic passing through the device.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco NX-OS | =7.3\(2\)n1\(0.8\) | |
| Cisco Nexus 5548P Firmware | ||
| Cisco Nexus 5548UP Firmware | ||
| Cisco Nexus 5596T Firmware | ||
| Cisco Nexus 5596UP Firmware | ||
| Cisco 56128p | ||
| Cisco Nexus 5624Q Firmware | ||
| Cisco Nexus 5648Q Firmware | ||
| Cisco Nexus 5672UP-16G | ||
| Cisco Nexus 5672UP-16G Firmware | ||
| Cisco Nexus 5696Q Firmware | ||
| Cisco Nexus 6001 Firmware | ||
| Cisco Nexus 6004 Firmware |
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Reference Links
Frequently Asked Questions
What is CVE-2018-0378?
CVE-2018-0378 is a vulnerability in the Precision Time Protocol (PTP) feature of Cisco Nexus 5500, 5600, and 6000 Series Switches running Cisco NX-OS Software that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
How does CVE-2018-0378 affect Cisco Nexus switches?
CVE-2018-0378 affects Cisco Nexus 5500, 5600, and 6000 Series Switches running Cisco NX-OS Software.
What is the severity of CVE-2018-0378?
CVE-2018-0378 has a severity rating of 8.6 (high).
How can an attacker exploit CVE-2018-0378?
An attacker can exploit CVE-2018-0378 by sending specially crafted Precision Time Protocol (PTP) packets to the affected device.
Is there a fix available for CVE-2018-0378?
Yes, Cisco has released a security advisory with mitigation steps for CVE-2018-0378.
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- vendor/cisco
- canonical/cisco nx-os
- version/cisco nx-os/7.3\(2\)n1\(0.8\)
- canonical/cisco nexus 5548p firmware
- canonical/cisco nexus 5548up firmware
- canonical/cisco nexus 5596t firmware
- canonical/cisco nexus 5596up firmware
- canonical/cisco 56128p
- canonical/cisco nexus 5624q firmware
- canonical/cisco nexus 5648q firmware
- canonical/cisco nexus 5672up-16g
- canonical/cisco nexus 5672up-16g firmware
- canonical/cisco nexus 5696q firmware
- canonical/cisco nexus 6001 firmware
- canonical/cisco nexus 6004 firmware