CIS CYBER SECURITY ADVISORIES

MS-ISAC CYBER SECURITY ADVISORY NUMBER:
2014-066

DATE(S) ISSUED:
08/12/2014

SUBJECT:
Cumulative Security Update for Internet Explorer (MS14-051)

OVERVIEW:

Multiple 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
This advisory covers one publicly and twenty-five privately disclosed vulnerabilities. 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:

Multiple vulnerabilities were discovered in Internet Explorer due to the way objects in memory are improperly accessed. The vulnerabilities are as follows:

  • Twenty-four memory corruption vulnerabilities
  • Two Elevation of Privilege vulnerabilities

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://technet.microsoft.com/library/security/ms14-051

CVE:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2817
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2819
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2774
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2784
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2796
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2808
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2810
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2811
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2818
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2820
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2821
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2822
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2823
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2824
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2825
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2826
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2827
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4050
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4051
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4052
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4055
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4056
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4057
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4058
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4063
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4067