CVE-2018-0154: Cisco IOS Software Integrated Services Module for VPN Denial-of-Service Vulnerability

Vulnerability summary

CVE-2018-0154 is a high (CVSS 7.8) Resource Management Errors vulnerability in Cisco IOS Software. It is known to be exploited: CISA lists it, first on 03-03-2022. EPSS estimates a 7.07% chance of exploitation in the next 30 days, higher than 94.1% of scored vulnerabilities.

Timeline

1. 28-03-2018
   PublishedVulnerability first disclosed.
2. 03-03-2022
   Added to CISA KEVCisco IOS Software Integrated Services Module for VPN Denial-of-Service Vulnerability
3. 17-03-2022
   CISA remediation dueApply updates per vendor instructions.
4. 12-01-2026
   Last modifiedVulnerability information updated.

Description

A vulnerability in the crypto engine of the Cisco Integrated Services Module for VPN (ISM-VPN) running Cisco IOS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient handling of VPN traffic by the affected device. An attacker could exploit this vulnerability by sending crafted VPN traffic to an affected device. A successful exploit could allow the attacker to cause the affected device to hang or crash, resulting in a DoS condition. Cisco Bug IDs: CSCvd39267.

• CWE-399Resource Management ErrorsWeaknesses in this category are related to improper management of system resources.