March 30, 2010 - Qualys® Vulnerability R&D Lab has modified an existing vulnerability checks in QualysGuard® to protect organizations against a zero day vulnerability present in Microsoft Internet Explorer for which a patch was announced today. Customers can immediately audit their networks for this and other new vulnerabilities by accessing their QualysGuard subscription.
Microsoft has released a security patch to fix zero day as well as other flaws in Internet Explorer.
Qualys has released the following checks for these new vulnerabilities:
|Microsoft Internet Explorer Cumulative Security Update|
|SEVERITY: Urgent 5|
|QUALYS ID: 100078|
|VENDOR REFERENCE: KB979352|
|CVE REFERENCE: CVE-2009-4074 | CVE-2010-0027 | CVE-2010-0244 | CVE-2010-0245 | CVE-2010-0246 | CVE-2010-0247 | CVE-2010-0248 | CVE-2010-0249|
|CVSS SCORES: Base 7.5/ Temporal 6.2|
|THREAT: Microsoft Internet Explorer is a Web browser for Microsoft Windows.
Internet Explorer is prone to the following vulnerabilities:
An XSS filter bypass vulnerability exists in the way that Internet Explorer 8 disables an HTML attribute in otherwise appropriately filtered HTTP response data. The vulnerability could allow initially disabled scripts to run in the wrong security context, leading to information disclosure.(CVE-2009-4074).
A remote code execution vulnerability exists in the way that Internet Explorer incorrectly validates input. An attacker could exploit the vulnerability by constructing a specially crafted URL.An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user.(CVE-2010-0027).
Multiple remote code execution vulnerabilities exists in the way that Internet Explorer accesses an object that has not been correctly initialized or has been deleted. An attacker could exploit these vulnerabilities by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution.(CVE-2010-0244, CVE-2010-0245,CVE-2010-0246,CVE-2010-0247,CVE-2010-0248,CVE-2010-0249).
Microsoft has released a security update that addresses these vulnerabilities by modifying the way that Internet Explorer handles objects in memory, validates input parameters, and filters HTML attributes.
The security update is rated Critical for all supported releases of Internet Explorer: Internet Explorer 5.01, Internet Explorer 6, Internet Explorer 6 Service Pack 1, Internet Explorer 7, and Internet Explorer 8 (except Internet Explorer 6 for supported editions of Windows Server 2003). For Internet Explorer 6 for supported editions of Windows Server 2003 as listed, this update is rated Moderate.
Windows XP Embedded Systems:- For additional information regarding security updates for embedded systems, refer to the following MSDN blog(s):
Note: The Aurora exploit takes advantage of this vulnerability.
|IMPACT: Successfully exploiting these vulnerabilities could allow a remote attacker to bypass some security restrictions or gain escalated privileges or cause remote code execution in context of affected product.|
Following are links for downloading patches to fix the vulnerabilities:
For a complete list of patch download links, please refer to Microsoft Security Bulletin MS10-002. Also refer to Microsoft Security Advisory(979352) to obtain details about a zero day vulnerability that was patched by MS10-002.
Refer to the advisory to obtain additional details on applying the workarounds.
This new vulnerability check is included in Qualys vulnerability signatures v1.26.28-3. Each QualysGuard account is automatically updated with the latest vulnerability signatures as they become available. To view the vulnerability signature version in your account, from the QualysGuard HOME menu, select the Account Info tab.
SELECTIVE SCAN INSTRUCTIONS USING QUALYSGUARD:
To perform a selective vulnerability scan, configure a scan profile to use the following options:
- Ensure access to TCP ports 135 and 139 are available.
- Enable Windows Authentication (specify Authentication Records).
- Enable the following Qualys IDs:
- If you would like the scan to return the Windows Hostname, also include QID 82044 and ensure access to UDP port 137 is available.
- If you would like to be notified if QualysGuard is unable to logon to a host (if Authentication fails), also include QID 105015.
In addition, prior to running a scan for these new vulnerabilities, you can estimate your exposure to these new threats by running the Risk Matrix Report, available from the QualysGuard HOME page.
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