The U.S. Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA) issued an emergency directive to address ongoing incidents associated with global Domain Name System (DNS) infrastructure tampering. CISA is aware of multiple executive branch agency domains that were impacted by the tampering campaign and has notified the agencies that maintain them. The directive requires federal agencies to take specific steps and comply with reporting procedures to mitigate risks from undiscovered tampering, prevent illegitimate DNS activity, and detect unauthorized certificates.
Federal agencies should review Emergency Directive 19-01 for required actions and reporting procedures.
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