Internet Explorer – Nine Remote Code Execution Vulnerabilities Found

SUBJECT:

Cumulative Security Update for Internet Explorer (MS13-021)

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 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.

SYSTEM 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:

Nine remote code execution vulnerabilities have been discovered in Internet Explorer. These vulnerabilities occur due to the way Internet Explorer accesses objects in memory that have not been properly deleted and 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 withfull 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.

Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments especially from un-trusted sources.

REFERENCES:

Microsoft:

http://technet.microsoft.com/en-us/security/bulletin/ms13-021

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0087

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0088

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0089

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0090

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0091

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0092

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0093

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0094

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1288

Security Focus:

http://www.securityfocus.com/bid/58327

http://www.securityfocus.com/bid/58360

http://www.securityfocus.com/bid/58361

http://www.securityfocus.com/bid/58367

http://www.securityfocus.com/bid/58369

http://www.securityfocus.com/bid/58370

http://www.securityfocus.com/bid/58371

http://www.securityfocus.com/bid/58372

http://www.securityfocus.com/bid/58387

Posted in Security Updates

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