Microsoft Exchange CVE-2018-8302 Remote Memory Corruption Vulnerability

Description

Microsoft Exchange is prone to a remote memory-corruption vulnerability. Attackers can exploit this issue to execute arbitrary code in the context of the currently logged-in user. Failed attacks will cause denial of service conditions.

Technologies Affected

• Microsoft Exchange Server 2010 SP3 Update Rollup 23
• Microsoft Exchange Server 2013 Cumulative Update 20
• Microsoft Exchange Server 2013 Cumulative Update 21
• Microsoft Exchange Server 2016 Cumulative Update 10
• Microsoft Exchange Server 2016 Cumulative Update 9

Recommendations

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

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 includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Implement multiple redundant layers of security.
Memory-protection schemes (such as nonexecutable stack and heap configurations and randomly mapped memory segments) will complicate exploits of memory-corruption vulnerabilities.

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