PT-2018-27: Arbitrary Command Execution in Cisco Secure ACS Vulnerable product Cisco ACS Version: 5.8.0.32.6 and earlier Link: https://www.cisco.com/ Severity level Severity level: High Impact: Remote command execution Access Vector: Remote CVSS v3: Base Score: 9.8 Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVE: CVE-2018-0253 Vulnerability description The specialists of the Positive Research center have detected an Arbitrary Command Execution vulnerability in Cisco Secure ACS. A vulnerability in Cisco Secure Access Control System (ACS), due to insufficient validation of the Action Message Format (AMF) protocol, allows unauthenticated, remote attackers to execute arbitrary commands on the ACS device by sending a crafted AMF message that contains malicious code. How to fix Use vendor's advisory: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-acs1 Advisory status 01.06.2017 - Vendor gets vulnerability details 02.05.2018 - Vendor releases fixed version and details 11.12.2018 - Public disclosure Credits The vulnerability was detected by Mikhail Klyuchnikov, Yury Aleynov, Positive Research Center (Positive Technologies Company) References http://en.securitylab.ru/lab/PT-2018-27 Reports on the vulnerabilities previously discovered by Positive Research: https://www.ptsecurity.com/ https://en.securitylab.ru/lab/ About Positive Technologies Positive Technologies is a leading digital security firm with over 15 years of experience in 360° protection of critical IT systems against the most advanced cyberthreats. State-of-the-art solutions are developed at the company's research center—one of the largest in Europe. Positive Technologies experts have helped to identify and fix over 250 zero-day vulnerabilities in products from Cisco, Google, Honeywell, Huawei, Microsoft, Oracle, SAP, Schneider Electric, Siemens, and others, earning a reputation for world-class expertise in protection of devices and infrastructures at all scales from ATMs to nuclear power stations. Findings by Positive Technologies researchers are used for updating the MaxPatrol knowledge base and for development of security solutions including PT Application Firewall, PT Application Inspector, MaxPatrol. These products allow securing web applications, evaluating network protection, blocking attacks in real time, ensuring compliance with industry and national standards, and training security specialists. Positive Technologies is the organizer of the annual Positive Hack Days international forum and security competition.
