TI-2018-00432 Aliases CVE-2018-0473 GHSA-qpmh-4wc8-x2vf

Cisco IOS Software Precision Time Protocol Denial of Service Vulnerability

MEDIUM 49CWE-399Published 2018-10-05 · Updated 2024-11-26

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

A vulnerability in the Precision Time Protocol (PTP) subsystem of Cisco IOS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of the Precision Time Protocol. The vulnerability is due to insufficient processing of PTP packets. An attacker could exploit this vulnerability by sending a custom PTP packet to, or through, an affected device. A successful exploit could allow the attacker to cause a DoS condition for the PTP subsystem, resulting in time synchronization issues across the network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.03519 89th 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 IOS Software	all versions	—	No fix listed	CNA

Cisco IOS Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios:15.2\(4\)e:::::::*	15.2(4)e	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.2\(5\):::::::*	15.2(5)	Vulnerable	Cisco

cpe:2.3:o:cisco:ios:15.2\(4\)e:*:*:*:*:*:*:* Versions 15.2(4)e Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.2\(5\):*:*:*:*:*:*:* Versions 15.2(5) Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-0473
2026-10-03 Alias added: GHSA-qpmh-4wc8-x2vf

References

Advisory 1

20180926 Cisco IOS Software Precision Time Protocol Denial of Service Vulnerability

Other 1

https://ics-cert.us-cert.gov/advisories/ICSA-19-094-03

TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8

See all 617 →

Sources

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