Actively exploited in the wild
Cisco IOS Software Integrated Services Module for VPN Denial-of-Service Vulnerability
Cisco - IOS Software · Listed in the CISA KEV since 2022-03-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2018-0154
HighCVSS 7.5KEVSummary
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. The issue is due to insufficient handling of VPN traffic. An attacker could exploit this by sending crafted VPN traffic, causing the device to hang or crash.
Risk Assessment
The risk is the potential disruption of VPN device operation, leading to unavailability of network services for the organization.
Recommendation
Apply the patches provided by Cisco for IOS and monitor Cisco security advisories for detailed information.
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Original NVD description (English source)
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.