Microsoft IIS Security Bypass Vulnerabilities

Summary

The IP Security feature in Microsoft Internet Information Services (IIS) 8.0 and 8.5 does not properly process wildcard allow and deny rules for domains within the ‘IP Address and Domain Restrictions’ list, which makes it easier for remote attackers to bypass an intended rule set via an HTTP request, aka ‘IIS Security Feature Bypass Vulnerability.’

Credit:

The information has been provided by Microsoft.


Details

Vulnerable Systems:
 * Microsoft Internet Information Services (IIS) 8.0 and 8.5

Immune Systems:
 * Microsoft Internet Information Services (IIS) after 8.5

Microsoft Internet Information Services (IIS) could allow a remote attacker to bypass security restrictions, caused by improper filtering of incoming web requests. By controlling the DNS response to the webserver, an attacker could send a specially crafted web request to bypass the IP and domain restrictions and access the website.

CVE Information:
CVE-2014-4078

Disclosure Timeline:
Original release date: 11/11/2014
Last revised: 12/31/2014

Categories: Windows