Improper authentication in Allen-Bradley MicroLogix 1400 - CVE-2017-12089

Vulnerability identifier: #VU11606

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-12089

CWE-ID: CWE-287

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the program download functionality due to improper authentication. A remote attacker can submit a specially crafted packet that does not indicate the download is complete to the controller during the standard download process and cause the service to crash.

Allen-Bradley MicroLogix 1400

Install update from vendor's website.

• https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0441
• https://ics-cert.us-cert.gov/advisories/ICSA-18-095-01

• Multiple vulnerabilities in Rockwell Automation MicroLogix