Authentication bypass in Allen-Bradley MicroLogix 1400 and Allen-Bradley MicroLogix 1100 - CVE-2017-7903

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Main Vulnerability Database Vulnerabilities #VU6699

Authentication bypass in Allen-Bradley MicroLogix 1400 and Allen-Bradley MicroLogix 1100 - CVE-2017-7903

Published: May 24, 2017


Vulnerability identifier: #VU6699
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2017-7903
CWE-ID: CWE-521
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Rockwell Automation
Affected software:
Allen-Bradley MicroLogix 1400
Allen-Bradley MicroLogix 1100

Detailed vulnerability description

The vulnerability allows a remote attacker to perform brute-force attack.

The vulnerability exists due to weak password requirements. A remote attacker can brute-force account passwords and bypass authentication on the system.

Successful exploitation of the vulnerability may result in unauthorized access to vulnerable system.


How to mitigate CVE-2017-7903

Update to version 21.00

Sources