CIS CYBER SECURITY ADVISORIES

MS-ISAC CYBER SECURITY ADVISORY NUMBER:
2014-011

DATE(S) ISSUED:
02/10/2014

SUBJECT:
Cumulative Security Update for Internet Explorer (MS14-010)

OVERVIEW:

EXECUTIVE SUMMARY:
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 twenty-three privately disclosed vulnerabilities and one publically disclosed vulnerability (CVE-2014-0267). There has not been any active exploitation or exploit code observed for any of these vulnerabilities at the time of their announcement.

SYSTEMS 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 have been discovered in Internet Explorer. The details of these vulnerabilities are as follows:

  • One elevation of privilege vulnerability exists in Internet Explorer, caused when Internet Explorer fails to properly validate permissions. This allows an attacker to lure a user to a malicious website, which will elevate the attackers privileges.
  • One cross-domain information disclosure vulnerability, caused when Internet Explorer does not properly enforce cross-domain policies. This allows an attacker to view information from another domain or Internet Explorer zone. An attacker can perform this exploit by hosting a malicious website and enticing a user to view it.
  • Twenty-two memory corruption vulnerabilities, which occur due to the way Internet Explorer improperly accesses objects in memory. 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.

Successful exploitation of these vulnerabilities could result in an attacker gaining full system privileges on the computer. 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/2909921
https://technet.microsoft.com/en-us/security/bulletin/ms14-010

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0267
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0268
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0269
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0270
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0271
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0272
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0273
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0274
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0275
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0276
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0277
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0278
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0279
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0280
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0281
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0282
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0283
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0284
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0285
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0286
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0287
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0288
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0289
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0290
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0293