vulnwire
8.6high

CVE-2018-0378

Cisco NX-OS Software for Nexus 5500, 5600, and 6000 Series Switches Precision Time Protocol Denial of Service Vulnerability

Published 8 y ago · modified 4 mo ago · JSON

CVSS
8.6
v3.0 · CNA
CISA KEV
No
not known exploited
EPSS
4.0%
percentile 91%
Public exploits
0
none known

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.

CISA SSVC assessment

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
23 mo ago

Exploit prediction (EPSS)

4.01% probability of exploitation in the next 30 days, higher than 91% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
CNA3.08.6CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA3.08.6CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD3.08.6CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD2.07.8AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • Cisco Cisco NX-OS Software for Nexus 6000 Series

Classification

Weakness
  • CWE-20 Improper Input Validation

References

  • securitytracker.com /id/1041920 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • securityfocus.com /bid/105669 · vdb-entry, x_refsource_BID, x_transferred
  • tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-nexus-ptp-dos · vendor-advisory, x_refsource_CISCO, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.