critical
9.8
CWE
307
Advisory Published
Updated

CVE-2017-7898

First published: Fri Jun 30 2017(Updated: )

An Improper Restriction of Excessive Authentication Attempts 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. There are no penalties for repeatedly entering incorrect passwords.

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

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2017-7898?

    CVE-2017-7898 has a severity rating that indicates a significant security risk due to improper restriction of excessive authentication attempts.

  • How do I fix CVE-2017-7898?

    To fix CVE-2017-7898, update the affected Rockwell Automation MicroLogix 1100 devices to the latest firmware version beyond 16.00.

  • Which devices are affected by CVE-2017-7898?

    CVE-2017-7898 affects Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers including models 1763-L16AWA and 1763-L16BBB, among others.

  • What type of vulnerability is CVE-2017-7898?

    CVE-2017-7898 is classified as an improper restriction of excessive authentication attempts vulnerability.

  • Can CVE-2017-7898 be exploited remotely?

    Yes, CVE-2017-7898 can potentially be exploited remotely to perform brute-force attacks on authentication.

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