Multiple Vulnerabilities in Microsoft Exchange Server Could Allow for Information Disclosure

ITS Advisory Number: 
2018-066
Date(s) Issued: 
Wednesday, June 20, 2018
Subject: 
Multiple Vulnerabilities in Microsoft Exchange Server Could Allow for Information Disclosure
Overview: 

Multiple vulnerabilities have been discovered in Microsoft Exchange Server, which could allow for information disclosure. Microsoft Exchange Server is an email server software product. Successful exploitation of these vulnerabilities could result in an attacker obtaining sensitive information on the affected server or result in a denial-of-service condition.

 

THREAT INTELLIGENCE:

There are currently no reports of these vulnerabilities being exploited in the wild.

Systems Affected: 
  • Microsoft Exchange Server 2010 Service Pack 3

  • Microsoft Exchange Server 2013

  • Microsoft Exchange Server 2016

RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
High
BUSINESS
Large and medium business entities: 
Medium
Small business entities: 
Medium
Home Users: 
N/A
Description: 

Multiple vulnerabilities have been discovered in Microsoft Exchange Server, which could allow for information disclosure. These vulnerabilities exist within the Oracle Outside In Technology software development kits (SDKs) utilized by Microsoft Exchange Server. Oracle Outside In Technology is a document extraction, conversion and viewing technology that can access the information in more than 600 file formats.

 

Details of these vulnerabilities are as follows:

  • A remote user can exploit a flaw in the Oracle Outside In Technology Outside In Filters component to access data and cause partial denial of service conditions. (CVE-2018-2768, CVE-2018-2806)
  • A remote user can exploit a flaw in the Oracle Outside In Technology Outside In Image Export SDK component to access data and cause partial denial of service conditions. (CVE-2018-2801)

Successful exploitation of these vulnerabilities could result in an attacker obtaining sensitive information on the affected server, or result in a denial-of-service condition.

Actions: 
  • After appropriate testing, immediately apply appropriate patches or mitigations provided by Microsoft.

  • Run all software as a non-privileged user (one without administrative rights) to diminish the effects of a successful attack.

  • Remind all users not to visit untrusted websites or follow links provided by unknown or untrusted sources.

  • Inform and educate users regarding threats posed by hypertext links contained in emails or attachments especially from untrusted sources

  • Apply the Principle of Least Privilege to all systems and services.