CVE-2018-0158highunder attackCWE-20

CVE-2018-0158: high-severity vulnerability in Cisco IOS and IOS XE

Published · Updated

Follow this CVE+ Monitor Cisco IOS XE+ Monitor IOS

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

51Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 8.6epss 7.2%
from disclosure to weapon
Published on NVDMar 28
CISA KEV+1436d
Action required by CISAfederal deadline: 2022-03-17

Apply updates per vendor instructions.

In short

A flaw in Cisco IOS and IOS XE's IKEv2 module allows attackers to crash or freeze devices by sending specially crafted packets, disrupting network services.

Technical detail

The vulnerability exists in IKEv2 packet processing due to improper input validation (CWE-20). An unauthenticated remote attacker can trigger a memory leak or device reload by transmitting malformed IKEv2 packets, resulting in denial of service. The affected device continuously consumes memory until failure.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device to be processed. A successful exploit could cause an affected device to continuously consume memory and eventually reload, resulting in a DoS condition. Cisco Bug IDs: CSCvf22394.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Affected products
n/a · Cisco IOS and IOS XE