CIS CYBER SECURITY ADVISORIES

MS-ISAC CYBER SECURITY ADVISORY NUMBER:
2014-044

DATE(S) ISSUED:
05/13/2014

SUBJECT:
Cumulative Security Update for Internet Explorer (MS14-029)

OVERVIEW:

Two vulnerabilities have been discovered in Microsoft's web browser, Internet Explorer, which could allow an attacker to take complete control of an affected system. Successful exploitation of these vulnerabilities could result in an attacker gaining elevated privileges on the system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

THREAT INTELLIGENCE
Two privately reported vulnerabilities were covered in this month's update. This security update is rated as Critical for Internet Explorer on Windows clients and Moderate for Internet Explorer on Windows Servers. There has not been any active exploitation or exploit code observed for any of these vulnerabilities at the time of their announcement.

SYSTEM AFFECTED:

  • Internet Explorer 6
  • Internet Explorer 7
  • Internet Explorer 8
  • Internet Explorer 9
  • Internet Explorer 10
  • Internet Explorer 11

 

RISK:
Government:

  • Large and medium government entities: High
  • Small government entities: High

Businesses:

  • Large and medium business entities: High
  • Small business entities: High

Home users: High

 

TECHNICAL SUMMARY:
Two memory corruption vulnerabilities, which occur due to the way Internet Explorer improperly accesses objects in memory, were found. These vulnerabilities could allow an attacker to execute remote code by luring a victim to a malicious website. When the website is visited, the attacker's script will run with same permissions as the affected user account.

Successful exploitation of these vulnerabilities could result in an attacker gaining elevated privileges on the system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

RECOMMENDATIONS:
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 click links from unknown sources, or to click links without verifying the intended destination.

 

REFERENCES:
Microsoft:

https://support.microsoft.com/kb/2962482
https://technet.microsoft.com/library/security/ms14-029

CVE:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0310
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1815

Security Focus:
http://www.securityfocus.com/bid/67299
http://www.securityfocus.com/bid/67301