VULNERABILITY INTELLIGENCE

CVE-2018-0159

CVSS score7.5 HIGH
EPSS probability6.87%
CISA KEVKnown exploited vulnerability
Published2018-03-28
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Known Exploited Vulnerability

Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability

Vendor / product: Cisco / IOS Software and Cisco IOS XE Software

Description

A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.

Weakness classification

  • CWE-20: Improper Input Validation

Primary references