Actively exploited in the wild
Cisco Secure Access Control System Java Deserialization Vulnerability
Cisco - Secure Access Control System (ACS) · Listed in the CISA KEV since 2022-03-25. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2018-0147
CriticalCVSS 9.8KEVSummary
A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) prior to release 5.8 patch 9 is due to insecure deserialization of user-supplied content. An unauthenticated remote attacker can send a crafted serialized Java object and execute arbitrary commands on the device with root privileges.
Risk Assessment
Successful exploitation allows an unauthenticated attacker to execute arbitrary commands with root privileges, resulting in full compromise of the authentication and access control system.
Recommendation
Upgrade Cisco Secure ACS to release 5.8 patch 9 or later and restrict network access to the system's administrative interfaces.
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Original NVD description (English source)
A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) prior to release 5.8 patch 9 could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected device. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object. An exploit could allow the attacker to execute arbitrary commands on the device with root privileges. Cisco Bug IDs: CSCvh25988.