Cumulative Security Update for Internet Explorer (MS15-056)

ITS Advisory Number: 
2015-063
Date(s) Issued: 
Tuesday, June 9, 2015
Subject: 
Cumulative Security Update for Internet Explorer (MS15-056)
Overview: 

Multiple vulnerabilities have been discovered in Microsoft's web browser, Internet Explorer. These vulnerabilities could allow remote code execution or an elevation of privilege if a user views a specially crafted webpage in Internet Explorer. An attacker who successfully exploits this vulnerability could gain the same user rights as the current user. Depending on the privileges associated with the user, an attacker could install programs; view, change, or delete data; or create new accounts with full user rights.

 

Systems Affected: 
  • Internet Explorer 11
  • Internet Explorer 10
  • Internet Explorer 9
  • Internet Explorer 8
  • Internet Explorer 7
  • Internet Explorer 6
RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
High
BUSINESS
Large and medium business entities: 
High
Small business entities: 
High
Home Users: 
High
Description: 

The following vulnerabilities were discovered in Internet Explorer:

Multiple elevation of privilege vulnerabilities exist:

  • When Internet Explorer does not properly validate permissions under specific conditions, potentially allowing script to be run with elevated privileges. [CVE-2015-1739, CVE-2015-1743, CVE-2015-1748]

An information disclosure vulnerability exists:

  • When Internet Explorer does not properly restrict access to the clipboard of a user who visits a website. The vulnerability could allow data stored in the Windows clipboard to be accessed by a malicious site. [CVE-2015-1765]

Multiple memory corruption vulnerabilities exist:

  • When Internet Explorer improperly accesses objects in memory. These vulnerabilities could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. [CVE-2015-1687, CVE-2015-1730, CVE-2015-1731, CVE-2015-1732, CVE-2015-1735, CVE-2015-1736, CVE-2015-1737, CVE-2015-1740, CVE-2015-1741, CVE-2015-1742, CVE-2015-1744, CVE-2015-1745, CVE-2015-1747, CVE-2015-1750, CVE-2015-1751, CVE-2015-1752, CVE-2015-1753, CVE-2015-1754, CVE-2015-1755, CVE-2015-1766].

These vulnerabilities could allow remote code execution or an elevation of privilege if a user views a specially crafted webpage in Internet Explorer. An attacker who successfully exploits this vulnerability could gain the same user rights as the current user. Depending on the privileges associated with the user, an attacker could install programs; view, change, or delete data; or create new accounts with full user rights.

Actions: 

We recommend the following actions be taken:

  • Apply appropriate patches provided by Microsoft to vulnerable systems immediately after appropriate testing.
  • 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.
  • Do not open email attachments from unknown or untrusted sources or suspicious emails from trusted sources.
References: 

Microsoft:

https://technet.microsoft.com/en-us/library/security/ms15-056  

 

CVE:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1687  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1730

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1731

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1732

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1735

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1736

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1737

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1739

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1740

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1741

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1742   

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1743

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1744

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1745

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1747

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1748

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1750

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1751

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1752

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1753

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1754

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1755

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1765

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1766