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Rewterz Threat Advisory – ICS: Siemens SCALANCE W780 and W740 denial of service

Severity

Medium

Analysis Summary

CVE-2021-25666

Siemens SCALANCE W780 and W740 are vulnerable to a denial of service, caused by improper input validation. By sending specially-crafted packets through the ARP protocol, a remote attacker could exploit this vulnerability to prevent device from operating normally for a short period, and results in a denial of service condition.

Impact

Denial of service

Affected Vendors

Siemens

Affected Products

  • Siemens SCALANCE W780
  • Siemens SCALANCE W740

Remediation

Refer to Siemens Security Advisory SSA-686152 for patch, upgrade or suggested workaround information.

Siemens Security Advisory SSA-686152