Multiple Vulnerabilities in Microsoft Uniscribe Could Allow for Remote Code Execution (MS17-011)

ITS Advisory Number: 
2017-025
Date(s) Issued: 
Wednesday, March 15, 2017
Subject: 
Multiple Vulnerabilities in Microsoft Uniscribe Could Allow for Remote Code Execution (MS17-011)
Overview: 

Multiple vulnerabilities exist in Windows Uniscribe, the most severe of which could result in remote code execution. Uniscribe is a set of APIs that allow a high degree of control for fine typography and for processing complex scripts as well as supporting the display and editing of international text. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

Systems Affected: 
  • Microsoft Windows: Vista, 7, 8.1, RT 8.1, 10
  • Microsoft Windows Server: 2008, 2008 R2, 2012, 2012 R2, 2016
  • Microsoft Windows Server Core: 2008, 2008 R2, 2012, 2012 R2, 2016
RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
Medium
BUSINESS
Large and medium business entities: 
High
Small business entities: 
Medium
Home Users: 
Low
Description: 

Multiple vulnerabilities exist in Windows Uniscribe, the most severe of which could result in remote code execution. The vulnerabilities are as follows:

  • Multiple remote code execution vulnerabilities exist in Windows due to the way Windows Uniscribe handles objects in memory. (CVE-2017-0072, CVE-2017-0083, CVE-2017-0084, CVE-2017-0086, CVE-2017-0087, CVE-2017-0088, CVE-2017-0089, CVE-2017-0090)
  • Multiple information disclosure vulnerabilities exist when Windows Uniscribe improperly discloses the contents of its memory. (CVE-2017-0085, CVE-2017-0091, CVE-2017-0092, CVE-2017-0111, CVE-2017-0112, CVE-2017-0113, CVE-2017-0114, CVE-2017-0115, CVE-2017-0116, CVE-2017-0117, CVE-2017-0118, CVE-2017-0119, CVE-2017-0120, CVE-2017-0121, CVE-2017-0122, CVE-2017-0123, CVE-2017-0124, CVE-2017-0125, CVE-2017-0126, CVE-2017-0127, CVE-2017-0128)

Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

Actions: 
  • After appropriate testing, immediately apply patches provided by Microsoft to vulnerable systems.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.
  • Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments, especially those from un-trusted sources.
  • Apply the Principle of Least Privilege to all systems and services.
References: 

Microsoft:

https://technet.microsoft.com/library/security/MS17-011

CVE:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0072

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0083

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0084

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0085

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0086

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0087

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0088

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0089

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0090

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0091

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0092

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0111

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0112

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0113

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0114

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0115

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0116

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0117

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0118

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0119

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0120

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0121

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0122

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0123

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0124

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0125

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0126

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0127

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0128