Vulnerability identifier: #VU15420

Vulnerability risk: Low

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0378

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco NX-OS
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists in the Precision Time Protocol (PTP) feature due to a lack of protection against PTP frame flood attacks. A remote attacker can send large streams of malicious IPv4 or IPv6 PTP traffic to and cause a DoS condition, impacting the traffic passing through the device.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Cisco NX-OS: 7.3.2 N1.1

---

External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-nexus-ptp-do...

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.