CVE-2018-0159: high-severity vulnerability in Cisco IOS and IOS XE
Published · Updated
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 7.5epss 6.9%
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's IKEv1 implementation fails to properly validate certain packets, allowing attackers to crash affected devices by sending malicious IKE negotiation packets, causing network outages.
Technical detail
Improper input validation (CWE-20) in IKEv1 packet processing allows an unauthenticated remote attacker to trigger a device reload via crafted packets during IKE negotiation. No authentication required; attack vector is network-based and results in denial of service through forced reboot.
Summary generated and translated by AI from the official description.
The full analysis of this CVE is available in Portuguese →
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
n/a · Cisco IOS and IOS XE