Improper authentication in Allen-Bradley MicroLogix 1400 - CVE-2017-12090

Vulnerability identifier: #VU11607

CSH Severity: Low

CVSSv4.0: 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/E:U/U:Clear

CVE-ID: CVE-2017-12090

CWE-ID: CWE-287

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Allen-Bradley MicroLogix 1400

Software vendor:
Rockwell Automation

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

The weakness exists in the processing of snmp-set commands due to improper authentication. A remote attacker can submit a specially crafted snmp-set request without associated SNMP-set commands for firmware flashing and cause the service to crash.

Install update from vendor's website.

• https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0442
• https://ics-cert.us-cert.gov/advisories/ICSA-18-095-01