TI-2018-00337 Aliases CVE-2018-0378 GHSA-cqfr-gw47-8rvr

Improper input validation in Cisco NX-OS Software for Nexus 6000 Series

MEDIUM 50CWE-20Published 2018-10-17 · Updated 2024-11-26

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.04014 90th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco NX-OS Software for Nexus 6000 Series	6.0(2)N1(2)	—	No fix listed	CNA

Cisco NX-OS Software for Nexus 6000 Series VendorCisco Affected 6.0(2)N1(2) Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:nx-os:7.3\(2\)n1\(0.8\):::::::*	7.3(2)n1(0.8)	Vulnerable	Cisco
cpe:2.3:h:cisco:nexus_5548p:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_5548up:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_5596t:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_5596up:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_56128p:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_5624q:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_5648q:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_5672up:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_5672up-16g:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:nx-os:7.3\(2\)n1\(0.8\):*:*:*:*:*:*:* Versions 7.3(2)n1(0.8) Vulnerable ·Cisco
cpe:2.3:h:cisco:nexus_5548p:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_5548up:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_5596t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_5596up:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_56128p:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_5624q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_5648q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_5672up:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_5672up-16g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Show 3 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:h:cisco:nexus_5696q:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_6001:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:nexus_6004:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:h:cisco:nexus_5696q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_6001:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:nexus_6004:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-0378
2026-10-03 Alias added: GHSA-cqfr-gw47-8rvr

References

Advisory 1

20181017 Cisco NX-OS Software for Nexus 5500, 5600, and 6000 Series Switches Precision Time Protocol Denial of Service Vulnerability

TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2024-13332 Cisco NX-OS Software CLI Command Injection Vulnerability KEVCVSS 3.1MEDIUM 6.7
TI-2018-00260 Improper input validation in Cisco NX-OS unknown CVSS 3.0CRITICAL 9.8
TI-2019-01226 Cisco NX-OS Software Netstack Denial of Service Vulnerability CVSS 3.1HIGH 8.6
TI-2022-05183 Cisco NX-OS Software Cisco Fabric Services Over IP Denial of Service Vulnerability CVSS 3.1HIGH 8.6
TI-2022-05182 Cisco Nexus 9000 Series Switches Bidirectional Forwarding Detection Denial of Service Vulnerability CVSS 3.1HIGH 8.6

See all 274 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences