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Microsoft security alert.

January 10, 2017

Advisory overview

Qualys Vulnerability R&D Lab has released new vulnerability checks in the Qualys Cloud Platform to protect organizations against 15 vulnerabilities that were fixed in 4 bulletins announced today by Microsoft. Customers can immediately audit their networks for these and other new vulnerabilities by accessing their Qualys subscription. Visit our blog to see how to prioritize remediation.

Non-Qualys customers can audit their network for these and other vulnerabilities by signing up for a Qualys Free Trial, or by trying our FreeScan service.

Vulnerability details

Microsoft has released 4 security bulletins to fix newly discovered flaws in their software. Qualys has released the following checks for these new vulnerabilities:

  • Microsoft Edge Cumulative Security Update (MS17-001)

    Severity
    Serious 3
    Qualys ID
    91327
    Vendor Reference
    MS17-001
    CVE Reference
    CVE-2017-0002
    CVSS Scores
    Base 6.8 / Temporal 5
    Description
    Microsoft Edge fails to enforce cross-domain policies with regards to about:blank, this could allow information from one domain to be injected in to another leading to elevation of privilege.

    Microsoft has assigned this advisory as Important for Microsoft Edge on Windows 10 and Windows Server 2016.

    The update resolves the vulnerability by assigning unique origin to top-level windows which navigate to data URLs.

    Consequence
    An attacker could host a website to exploit the vulnerability, it could also be exploited by providing crafted content to websites that accepts user input.
    Solution
    Customers are advised to refer to Microsoft Security Bulletin MS17-001 for details.

    Patches:
    The following are links for downloading patches to fix these vulnerabilities:
    MS17-001 Windows 10 Version 1511 for 32-bit Systems
    MS17-001 Windows 10 Version 1511 for 64-bit Systems
    MS17-001 Windows 10 Version 1607 for 32-bit
    MS17-001 Windows 10 Version 1607 for 64-bit
    MS17-001 Windows 10 for 32-bit Systems
    MS17-001 Windows 10 for 64-bit Systems
    MS17-001 Windows Server 2016

  • Microsoft Office Remote Code Execution Vulnerability (MS17-002)

    Severity
    Critical 4
    Qualys ID
    110293
    Vendor Reference
    MS17-002
    CVE Reference
    CVE-2017-0003
    CVSS Scores
    Base 9.3 / Temporal 6.9
    Description
    A remote code execution vulnerability exists in Microsoft Office software when the Office software fails to properly handle objects in memory.

    The security update addresses the vulnerability by correcting how affected versions of Office and Office components handle objects in memory. Affected Versions:
    Microsoft Word 2016 and Microsoft SharePoint Enterprise Server 2016

    Consequence
    An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user.
    Solution
    Refer to MS17-002 for more information.

    Patches:
    The following are links for downloading patches to fix these vulnerabilities:
    MS17-002 Microsoft SharePoint Enterprise      Server 2016
    MS17-002 Microsoft Word 2016 (32-bit edition)
    MS17-002 Microsoft Word 2016 (64-bit edition)

  • Microsoft Windows Update for Vulnerabilities in Adobe Flash Player in Internet Explorer (MS17-003)

    Severity
    Urgent 5
    Qualys ID
    100304
    Vendor Reference
    MS17-003
    CVE Reference
    CVE-2017-2925, CVE-2017-2926, CVE-2017-2927, CVE-2017-2928, CVE-2017-2930, CVE-2017-2931, CVE-2017-2932, CVE-2017-2933, CVE-2017-2934, CVE-2017-2935, CVE-2017-2936, CVE-2017-2937
    CVSS Scores
    Base 10 / Temporal 7.8
    Description
    The update addresses the vulnerabilities which are described in Adobe Security Bulletin APSB17-02, by updating the affected Adobe Flash libraries contained within Internet Explorer 10, Internet Explorer 11, and Microsoft Edge.

    This security update resolves vulnerabilities in Adobe Flash Player when installed on all supported editions of Windows 8.1, Windows Server 2012, Windows Server 2012 R2, Windows RT 8.1, Windows 10, and Windows Server 2016.

    Consequence
    Successful exploitation of this vulnerability will allow an unauthenticated, remote attacker to execute arbitrary code on the targeted system.
    Solution
    Customers are advised to view MS17-003 for instructions pertaining to the remediation of these vulnerabilities.

    Patches:
    The following are links for downloading patches to fix these vulnerabilities:
    MS17-003

  • Microsoft Windows Local Security Authority Subsystem Service Denial of Service (MS17-004)

    Severity
    Serious 3
    Qualys ID
    91326
    Vendor Reference
    MS17-004
    CVE Reference
    CVE-2017-0004
    CVSS Scores
    Base 7.8 / Temporal 6.8
    Description
    The Local Security Authority Subsystem Service (LSASS) is a process in windows which is helps in enforcing security policies on a system.

    The updates fixes a fixes a denial of service attack by changing the way LSASS handles specially crafted authentication requests.

    Affected Operating Systems include Microsoft Windows Vista, Windows Server 2008 (including Core), Windows 7, and Windows Server 2008 R2 (including Core).

    The update is rated important for all affected Operating Systems.

    Consequence
    An attacker can cause a denial of service of attack because of flaws in the way authentication requests are handled by LSASS and cause a system reboot.
    Solution
    Customers are advised to view MS17-004 for instructions pertaining to the remediation of these vulnerabilities.

    Patches:
    The following are links for downloading patches to fix these vulnerabilities:
    MS17-004 Microsoft Windows

These new vulnerability checks are included in Qualys vulnerability signature 2.3.516-3. Each Qualys account is automatically updated with the latest vulnerability signatures as they become available. To view the vulnerability signature version in your account, from the Qualys Help menu, select the About tab.

Selective Scan Instructions Using Qualys

To perform a selective vulnerability scan, configure a scan profile to use the following options:

  1. Ensure access to TCP ports 135 and 139 are available.
  2. Enable Windows Authentication (specify Authentication Records).
  3. Enable the following Qualys IDs:
    • 91327
    • 110293
    • 100304
    • 91326
  4. If you would like the scan to return the Windows Hostname, also include QID 82044 and ensure access to UDP port 137 is available.
  5. If you would like to be notified if Qualys is unable to log on 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 Analysis Report, available from the Qualys Vulnerability Management Reports tab.

Access for Qualys Customers

Technical Support

For more information, customers may contact Qualys Technical Support.

About Qualys

The Qualys Cloud Platform and its integrated suite of security and compliance applications provides organizations of all sizes with a global view of their security and compliance solutions, while drastically reducing their total cost of ownership. Qualys solutions include: continuous monitoring, vulnerability management, policy compliance, PCI compliance, security assessment questionnaire, web application scanning, web application firewall, malware detection and SECURE Seal for security testing of web sites.