CIS CYBER SECURITY ADVISORIES
MS-ISAC CYBER SECURITY ADVISORY NUMBER:
Cumulative Security Update for Internet Explorer (MS14-052)
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.
This advisory covers one publicly disclosed and thirty-six privately reported vulnerabilities in Internet Explorer. At this time, there have been attempts to exploit the vulnerability described in in CVE-2013-7331. No other active exploitation attempts have been observed.
- Internet Explorer 6
- Internet Explorer 7
- Internet Explorer 8
- Internet Explorer 9
- Internet Explorer 10
- Internet Explorer 11
- Large and medium government entities:High
- Small government entities:High
- Large and medium business entities:High
- Small business entities:High
Home users: High
Multiple vulnerabilities were discovered in Internet Explorer due to the way objects in memory are improperly accessed. The vulnerabilities are as follows:
- Thirty-six memory corruption vulnerabilities
- One resource information disclosure 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. An attacker could then install programs; view, change, or delete data. The resource information disclosure vulnerability allows the enumeration of local and UNC paths, intranet hostnames, and intranet IP addresses.
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 to only click links from trusted sources, and only after verifying the destination of the link.