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Rewterz Threat Advisory – CVE-2021-22749 – ICS: Schneider Electric Modicon X80

Severity

Medium

Analysis Summary

CVE-2021-22749

This vulnerability could cause an information leak concerning the current RTU configuration including communication parameters dedicated to telemetry when a specially crafted HTTP request is sent to the webserver of the module. Successful exploitation of this vulnerability may result in an information disclosure to an unauthenticated remote user, which could result in an understanding of the network architecture.

Impact

  • Information Disclosure

Affected Vendors

Schneider Electric

Affected Products

  • Modicon X80 BMXNOR0200H RTU SV1.70 IR22 and prior

Remediation

Refer to vendor advisory for the complete list of affected products and their respective patches at https://us-cert.cisa.gov/ics/advisories/icsa-21-159-05

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