CERT/CC Reports Microsoft Exchange 2013 and Newer are Vulnerable to NTLM Relay Attacks

["US-CERT" <US-CERT () ncas us-cert gov>]

U.S. Department of Homeland Security US-CERT

National Cyber Awareness System:



CERT/CC Reports Microsoft Exchange 2013 and Newer are Vulnerable to NTLM Relay Attacks [ 
https://www.us-cert.gov/ncas/current-activity/2019/01/28/CERTCC-Reports-Microsoft-Exchange-2013-and-Newer-are-Vulnerable
 ] 01/28/2019 08:53 PM EST 
Original release date: January 28, 2019

The CERT Coordination Center (CERT/CC) has released information to address NTLM relay attacks affecting Microsoft 
Exchange 2013 and newer versions. A remote attacker could exploit this vulnerability to take control of an affected 
system.

The National Cybersecurity and Communications Integration Center (NCCIC), part of the Cybersecurity and Infrastructure 
Security Agency (CISA), encourages users and administrators to review CERT/CCs Vulnerability Note VU#465632 [ 
https://www.kb.cert.org/vuls/id/465632/ ] andconsider the listedworkarounds until patches are made available.

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