critical
9.8
CWE
326 521
Advisory Published
Updated

CVE-2017-7903: Weak Encryption

First published: Fri Jun 30 2017(Updated: )

A Weak Password Requirements issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. The affected products use a numeric password with a small maximum character size for the password.

Credit: ics-cert@hq.dhs.gov

Affected SoftwareAffected VersionHow to fix
Rockwell Automation 1763-L16AWA Series A<=16.000
Rockwell Automation 1763-L16AWA Series B<=16.000
Rockwell Automation 1763-L16BBB Series A<=16.000
Rockwell Automation 1763-L16BBB Series B<=16.000
Rockwell Automation 1763-L16BWA Series A<=16.000
Rockwell Automation 1763-L16AWA Series B<=16.000
Rockwell Automation 1763-L16DWD Series A<=16.000
Rockwell Automation 1763-L16DWD Series B<=16.000
Rockwell Automation MicroLogix=1100
Rockwell Automation 1766-L32AWA Series A<=16.000
Rockwell Automation 1766-L32AWA Series B<=16.000
Rockwell Automation 1766-L32AWAA Series A<=16.000
Rockwell Automation 1766-L32AWAA Series B<=16.000
Rockwell Automation 1766-L32BWA Series A<=16.000
Rockwell Automation 1766-L32BWA Series B<=16.000
Rockwell Automation 1766-L32BWAA Series A<=16.000
Rockwell Automation 1766-L32BWAA Series A<=16.000
Rockwell Automation 1766-L32BXB Series A<=16.000
Rockwell Automation 1766-L32BXB Series B<=16.000
Rockwell Automation 1766-L32BXBA Series A<=16.000
Rockwell Automation 1766-L32BXBA Series B<=16.000
Rockwell Automation MicroLogix=1400

Remedy

https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2017-7903?

    CVE-2017-7903 has a medium severity rating due to weak password requirements that could allow unauthorized access.

  • How do I fix CVE-2017-7903?

    To fix CVE-2017-7903, implement stronger password policies and update the affected Rockwell Automation devices to a version beyond 16.00.

  • Which devices are affected by CVE-2017-7903?

    CVE-2017-7903 affects Rockwell Automation Allen-Bradley MicroLogix 1100 models 1763-L16AWA, 1763-L16BBB, and 1763-L16BWA, Series A and B, in versions 16.00 and prior.

  • What risks are associated with CVE-2017-7903?

    The risks associated with CVE-2017-7903 include potential unauthorized access and control of industrial processes due to weak password protections.

  • Is CVE-2017-7903 a common vulnerability?

    Yes, CVE-2017-7903 is indicative of common vulnerabilities involving weak password practices in industrial control systems.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203