CIS CYBER SECURITY ADVISORIES

MS-ISAC CYBER SECURITY ADVISORY NUMBER:
2014-082

DATE(S) ISSUED:
10/14/2014

SUBJECT:
Cumulative Security Update for Internet Explorer (MS14-056)

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 fourteen privately disclosed vulnerabilities. Microsoft reported that the elevation of privilege vulnerability (CVE-2014-4123) is currently being exploited.

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:

  • Eleven Memory Corruption Vulnerabilities
  • Two Elevation of Privilege Vulnerabilities
  • One ASLR Bypass Vulnerability

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/ms14-056

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4123

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4124

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4126

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4127

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4128

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4129

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4130

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4132

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4133

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4134

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4137

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4138

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4140

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4141