Security Update for Internet Explorer (MS15-065)

ITS Advisory Number: 
2015-078
Date(s) Issued: 
Tuesday, July 14, 2015
Subject: 
Security Update for Internet Explorer (MS15-065)
Overview: 

This security update resolves vulnerabilities in Internet Explorer. The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the current user. Customers 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: 

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 security update addresses the vulnerabilities by:

  • Modifying how Internet Explorer, VBScript, and JScript handle objects in memory
  • Helping to ensure that affected versions of Internet Explorer properly implement the CFG security feature
  • Preventing the XSS filter in Internet Explorer from incorrectly disabling HTML attributes
  • Adding additional permission validations to Internet Explorer
  • Helping to ensure that affected versions of Internet Explorer properly implement the Address Space Layout Randomization (ASLR) security feature
  • Helping to ensure cross-domain policies are properly enforced in Internet Explorer
  • Helping to restrict what information is returned to external style sheets
  • Helping to ensure that file paths are properly validated before returning file data to the user
  • Helping to ensure that requests for module resources are properly validated in 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.

Actions: 

We recommend the following actions be taken:

  • After appropriate testing, apply appropriate 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 untrusted websites or follow links provided by unknown or untrusted 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/MS15-065   

 

CVE:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1729

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1733

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1738

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1767

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2372  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2383  

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2384

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2385

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2388

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2389

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2390   

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2391  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2397  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2398  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2401  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2402  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2403  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2404  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2406  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2408  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2410

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2411

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2412

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2413

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2414

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2419  

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2421

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2422

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2425