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The following cyber advisory was issued by the New York State Office of Information Technology Services and is intended for State government entities. The information may or may not be applicable to the general public and, accordingly, the State does not warrant its use for any specific purposes.

ITS ADVISORY NUMBER:
2013-062

DATE(S) ISSUED:
7/09/2013

SUBJECT:
Cumulative Security Update for Internet Explorer (MS13-055)

OVERVIEW:

Multiple vulnerabilities have been discovered in Microsoft's web browser, Internet Explorer, which could result in remote code execution. If a user views a specially crafted website using Internet Explorer, an attacker could gain the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

SYSTEMS AFFECTED:

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

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

DESCRIPTION:
Multiple vulnerabilities have been discovered in Microsoft's web browser, Internet Explorer, which could result in remote code execution.

Seventeen remote code execution vulnerabilities have been discovered in Internet Explorer. Sixteen of these vulnerabilities occur due to the way Internet Explorer improperly accesses objects in memory.  One vulnerability is due to Internet Explorer not handling the encoding for Shift-JIS auto-selection correctly.  These vulnerabilities could be exploited if a user visits a web page that is specifically crafted to take advantage of the vulnerabilities.

Successful exploitation of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, 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 visit un-trusted websites or follow links provided by unknown or un-trusted sources.

REFERENCES:
Microsoft:
http://technet.microsoft.com/en-us/security/bulletin/MS13-055

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3115
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3143
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3144
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3145
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3146
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3147
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3148
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3149
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3150
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3151
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3152
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3153
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3161
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3162
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3163
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3164
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3166