Cisco IOS and IOS XE Software IPv6 Hop-by-Hop Options Denial of Service Vulnerability

Published 8 y ago 2018-10-05 · modified 4 mo ago 2026-06-17 · JSON

CVSS

8.6

v3.0 · NVD

CISA KEV

not known exploited

EPSS

3.8%

percentile 90%

Public exploits

none known

A vulnerability in the IPv6 processing code of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload. The vulnerability is due to incorrect handling of specific IPv6 hop-by-hop options. An attacker could exploit this vulnerability by sending a malicious IPv6 packet to or through the affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition on an affected device.

CISA SSVC assessment

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 23 mo ago 2024-11-25

Exploit prediction (EPSS)

3.81% probability of exploitation in the next 30 days, higher than 90% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	8.6	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H`
NVD	2.0	7.8	`AV:N/AC:L/Au:N/C:N/I:N/A:C`

Affected products

Cisco Cisco IOS Software

Classification

Weakness

CWE-20 Improper Input Validation

Technology feeds

Cisco IOS (RSS, critical only)

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-ipv6hbh · vendor-advisory, x_refsource_CISCO, x_transferred
securitytracker.com /id/1041737 · vdb-entry, x_refsource_SECTRACK, x_transferred
ics-cert.us-cert.gov /advisories/ICSA-19-094-03 · x_refsource_MISC, x_transferred

Sources

CVE List: CVE-2018-0467
NVD: CVE-2018-0467

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

Summary