CIS CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2015-013

DATE(S) ISSUED:
02/10/2015

SUBJECT:
Cumulative Security Update for Internet Explorer (MS15-009)

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 40 privately disclosed and one publicly disclosed vulnerabilities.Remote code execution vulnerabilities have been identified in 3 major components of Internet Explorer across multiple Windows products.

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:

  • 35 Memory Corruption Vulnerabilities
  • Four 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/MS15-009

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8967

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0017

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0018

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0019

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0020

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0021

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0022

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0023

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0025

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0026

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0027

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0028

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0029

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0030

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0031

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0035

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0036

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0037

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0038

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0039

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0040

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0041

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0042

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0043

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0044

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0045

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0046

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0048

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0049

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0050

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0051

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0052

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0053

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0054

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0055

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0066

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0067

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0068

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0069

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0070

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0071