Microsoft SharePoint Server CVE-2018-0790 Remote Privilege Escalation Vulnerability

Description

Microsoft SharePoint Server is prone to a remote privilege-escalation vulnerability because it fails to properly sanitize user-supplied input. An attackers may exploit this issue to gain elevated privileges. Successful exploits may aid in further attacks.

Technologies Affected

• Microsoft SharePoint Enterprise Server 2013 Service Pack 1
• Microsoft SharePoint Enterprise Server 2016
• Microsoft SharePoint Foundation 2010 SP2

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This may indicate exploit attempts or activity that results from successful exploits.

Do not accept communications that originate from unknown or untrusted sources.
Do not open or view email from unknown or untrusted sources.

Updates are available. Please see the references or vendor advisory for more information.