Microsoft security alert.

Advisory overview

Qualys Vulnerability R&D Lab has released new vulnerability checks in the Enterprise TruRisk Platform to protect organizations against 76 vulnerabilities that were fixed in 9 bulletins announced today by Microsoft. Customers can immediately audit their networks for these and other new vulnerabilities by accessing their Qualys subscription. Visit Qualys Security Blog 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 Qualys Community Edition.

Vulnerability details

Microsoft has released 9 security bulletins to fix newly discovered flaws in their software. Qualys has released the following checks for these new vulnerabilities:

• Microsoft Windows Exchange Server Update For March 2018

  Severity

  Critical 4

  Qualys ID

  53011

  Vendor Reference

  KB4073392, KB4073537

  CVE Reference

  CVE-2018-0924, CVE-2018-0940, CVE-2018-0941

  CVSS Scores

  Base 4.3 / Temporal 3.2

  Description

  This security update resolves a vulnerability in Microsoft Exchange Outlook Web Access (OWA). The vulnerability could allow elevation of privilege or spoofing in Microsoft Exchange Server if an attacker sends an email that has a specially crafted attachment to a vulnerable Exchange server. Microsoft has also released an update for Microsoft Exchange that provides enhanced security as a defense-in-depth measure.

  KB Articles associated with this update are: KB4073392 and KB4073537

  QID Detection Logic:
  File versions of bin\Exsetup.exe file are checked:
  MS Exchange 2010: 14.3.389.0
  MS Exchange 2013 - SP1: 15.0.847.59
  MS Exchange 2013 - CU18 and CU19: 15.0.1347.5, 15.0.1365.3
  MS Exchange 2016 - CU7 and CU8: 15.1.1261.39, 15.1.1415.4

  Consequence

  Successful exploitation of the vulnerability will lead to privilege escalation or spoofing in Microsoft Exchange Server if an attacker sends an email that has a specially crafted attachment to a vulnerable Exchange server.

  Solution

  Customers are advised to refer to Microsoft Security Guidance for more details pertaining to this vulnerability.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  KB4073392
  KB4073537

• Microsoft Internet Explorer Security Update for March 2018

  Severity

  Urgent 5

  Qualys ID

  100331

  Vendor Reference

  KB4088776, KB4088779, KB4088782, KB4088786, KB4088787, KB4088875, KB4088876, KB4088877, KB4089187

  CVE Reference

  CVE-2018-0889, CVE-2018-0891, CVE-2018-0927, CVE-2018-0929, CVE-2018-0932, CVE-2018-0935, CVE-2018-0942, CVE-2018-8118

  CVSS Scores

  Base 7.6 / Temporal 6.3

  Description

  Internet Explorer is a web-browser developed by Microsoft which is included in Microsoft Windows Operating Systems.

  Microsoft has released Cumulative Security Updates for Internet Explorer which addresses various vulnerabilities found in Internet Explorer 9 (IE 9), Internet Explorer 10 (IE 10) and Internet Explorer 11 (IE 11). The security updated is rated Moderate for for Internet Explorer 9 (IE 9) and Internet Explorer 10 (IE 10) and Critical for Internet Explorer 11 (IE 11). The most severe of the vulnerabilities could allow remote code execution.

  KB Articles associated with the Update:
  1) 4088875
  2) 4089187
  3) 4088779
  4) 4088876
  5) 4088787
  6) 4088786
  7) 4088782
  8) 4088776
  9) 4088877

  QID Detection Logic (Authenticated):
  Operating Systems: Windows Server 2008, Windows Server 2008 R2, Windows 7, Windows 8.1, Windows RT 8.1, Windows10, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016
  This QID checks for the file version of %windir%\System32\mshtml.dll
  The following KBs are checked:
  The patch version is 9.0.8112.21200 (KB4089187)
  The patch version is 10.0.9200.22387 (KB4089187 or KB4088877)
  The patch version is 11.0.9600.18953 (KB4088875 or KB4089187 or KB4088876)
  The patch version is 11.0.10240.17797 (KB4088786)
  The patch version is 11.0.10586.1478(KB4088779)
  The patch version is 11.0.14393.2125 (KB4088787)
  The patch version is 11.0.15063.966 (KB4088782)
  The patch version is 11.0.16299.309 (KB4088776)
  

  Consequence

  Successful exploitation of the vulnerability will lead to:

  1) Remote Code Execution
  2) Information Disclosure
  3) Elevation of Privilege

  Solution

  For more information, Customers are advised to refer the Security Update Guide.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  Microsoft Security Update Guide

• Microsoft Office and Microsoft Office Services and Web Apps Security Update March 2018

  Severity

  Critical 4

  Qualys ID

  110312

  Vendor Reference

  KB3114416, KB4011023, KB4011234, KB4011665, KB4011673, KB4011674, KB4011675, KB4011688, KB4011692, KB4011695, KB4011705, KB4011709, KB4011714, KB4011720, KB4011721, KB4011727, KB4011730, KB4018291, KB4018293, KB4018298, KB4018304, KB4018305, KB4018309

  CVE Reference

  CVE-2018-0903, CVE-2018-0907, CVE-2018-0909, CVE-2018-0910, CVE-2018-0911, CVE-2018-0912, CVE-2018-0913, CVE-2018-0914, CVE-2018-0915, CVE-2018-0916, CVE-2018-0917, CVE-2018-0919, CVE-2018-0921, CVE-2018-0922, CVE-2018-0923, CVE-2018-0944, CVE-2018-0947

  CVSS Scores

  Base 9.3 / Temporal 6.9

  Description

  Microsoft releases security updates on March 2018 to fix multiple security vulnerabilities:

  This security updates contain following KBs:
  KB3114416 KB4011234 KB4011665 KB4011673 KB4011674 KB4011675 KB4011688 KB4011692 KB4011695 KB4011705 KB4011709 KB4011714 KB4011720 KB4011721 KB4011727 KB4011730 KB4018291 KB4018293 KB4018298 KB4018304 KB4018305 KB4018309 QID Detection Logic:
  This authenticated QID checks the file versions from above Microsoft KB article with the versions on affected office system.

  Consequence

  An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user.

  Solution

  Customers are advised to refer to Microsoft Security Guidance for more details pertaining to this vulnerability.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  Microsoft Office and Microsoft Office Services and Web Apps Security Update March 2018(Office)

• Microsoft .NET CORE Hash Collision Denial Of Service Vulnerability March 2018

  Severity

  Serious 3

  Qualys ID

  370820

  Vendor Reference

  .NET Core CVE-2018-0875

  CVE Reference

  CVE-2018-0875

  CVSS Scores

  Base 5 / Temporal 3.7

  Description

  .NET Core is a general purpose development platform maintained by Microsoft and the .NET community on GitHub. It is cross-platform, supporting Windows, macOS and Linux, and can be used in device, cloud, and embedded/IoT scenarios.

  A denial of service vulnerability exists in the way that .NET Core handles specially crafted requests, causing a hash collision.

  Affected versions:
  .NET Core 1.0.x prior to 1.0.10
  .NET Core 1.1.x prior to 1.1.7
  .NET Core 2.0.x prior to 2.0.6

  QID Detection Logic (Authenticated):
  This QID checks for the existence of vulnerable versions of .net core directories under default locations (/usr/share/dotnet/shared/Microsoft.NETCore.App/, /usr/local/share/dotnet/shared/Microsoft.NETCore.App/).

  Consequence

  An attacker who successfully exploited this vulnerability can cause a denial of service against a .NET Core web application.

  Solution

  Microsoft has released an update. Please refer to vendor security advisory .NET Core CVE-2018-0875 for more information.
  

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  .NET Core CVE-2018-0875

• Microsoft Windows Adobe Flash Player Security Update for March 2018 (ADV180006)

  Severity

  Urgent 5

  Qualys ID

  100330

  Vendor Reference

  ADV180006

  CVE Reference

  CVE-2018-4919, CVE-2018-4920

  CVSS Scores

  Base 9.3 / Temporal 6.9

  Description

  This security update resolves vulnerabilities which are described in the Adobe Security Bulletin APSB18-05, if installed on any supported edition of Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows 10, Windows 10 Version 1511, Windows 10 Version 1607, Windows 10 Version 1703, Windows 10 Version 1709, Windows 8.1, or Windows RT 8.1.

  QID Detection Logic:
  Operating Systems: Windows 8.1, Windows RT 8.1, Windows10, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016
  This authenticated QID checks for the file version of %windir%\System32\Macromed\Flash\Flash.ocx for file versions lesser than 29.0.0.113.

  KB Articles associated with this update are: ADV180006

  Consequence

  Successful exploitation allows an attacker to execute code remotely.

  Solution

  Customers are advised to follow KB4088785 for instructions pertaining to the remediation of these vulnerabilities.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  KB4088785

• Microsoft Edge Security Update for March 2018

  Severity

  Urgent 5

  Qualys ID

  91437

  Vendor Reference

  KB4088776, KB4088779, KB4088782, KB4088786, KB4088787

  CVE Reference

  CVE-2018-0872, CVE-2018-0873, CVE-2018-0874, CVE-2018-0876, CVE-2018-0879, CVE-2018-0891, CVE-2018-0893, CVE-2018-0927, CVE-2018-0930, CVE-2018-0931, CVE-2018-0932, CVE-2018-0933, CVE-2018-0934, CVE-2018-0936, CVE-2018-0937, CVE-2018-0939

  CVSS Scores

  Base 7.6 / Temporal 6.3

  Description

  Microsoft Edge is a web browser developed by Microsoft that replaces Internet Explorer as the default web browser.
  Microsoft Edge suffers multiple security vulnerabilities. The most severe of the vulnerabilities could allow remote code execution.

  KB Articles associated with the update:
  1) KB4088779
  2) KB4088787
  3) KB4088786
  4) KB4088782
  5) KB4088776
  

  QID Detection Logic (Authenticated):
  Operating Systems: All versions of Windows 10 and Windows Server 2016
  This QID checks for the file version of %windir%\System32\edgehtml.dll
  The following KBs are checked:
  The patch version is 11.0.10240.17797 (KB4088786)
  The patch version is 11.0.10586.1478(KB4088779)
  The patch version is 11.0.14393.2125 (KB4088787)
  The patch version is 11.0.15063.966 (KB4088782)
  The patch version is 11.0.16299.309 (KB4088776)
  

  Consequence

  Successful exploitation of the vulnerability allows:

  1) Remote Code Execution
  2) Information Disclosure

  Solution

  For more information, customers are advised to refer the Security Update Guide.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  Microsoft Security Update Guide

• Microsoft ASP.NET Core Multiple Security Vulnerabilities for March 2018

  Severity

  Critical 4

  Qualys ID

  91436

  Vendor Reference

  Announcement 294, Announcement 295

  CVE Reference

  CVE-2018-0787, CVE-2018-0808

  CVSS Scores

  Base 6.8 / Temporal 5

  Description

  Microsoft ASP.NET Core is a free and open-source web framework developed by Microsoft and the community.

  Microsoft ASP.NET Core contains the following vulnerabilities:
  CVE-2018-0787: An elevation of privilege vulnerability exists when a Kestrel web application fails to validate web requests. The security update addresses the vulnerability by correcting how a Kestrel web application validates web requests.
  CVE-2018-0808: A denial of service (DoS) vulnerability exists when ASP.NET Core improperly handles web requests. The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.

  Affected Versions:
  ASP.NET Core versions 2.0.0 through 2.1.3

  QID Detection Logic:
  This authenticated QID checks the 'dotnet.dll' or 'aspnetcore.dll' version to see if it's less than patched versions, 2.0.2.0 for 'dotnet.dll' and '7.1.1990.0' for 'aspnetcore.dll'.

  Consequence

  Depending on the vulnerability exploited, a successful attack allows an unauthenticated remote attacker to conduct HTML injection attacks and execute code with elevated privileges or cause a DoS condition on the targeted system.

  Solution

  Customers are advised to upgrade to ASP.NET Core 2.1.4 or later versions to remediate these vulnerabilities.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  ASP.NET Core 2.1.4 or later

• Microsoft Windows Security Update March 2018

  Severity

  Critical 4

  Qualys ID

  91435

  Vendor Reference

  KB4056564, KB4073011, KB4087398, KB4088776, KB4088779, KB4088782, KB4088786, KB4088787, KB4088827, KB4088875, KB4088876, KB4088877, KB4088878, KB4088879, KB4088880, KB4089175, KB4089229, KB4089344, KB4089453

  CVE Reference

  CVE-2018-0811, CVE-2018-0813, CVE-2018-0814, CVE-2018-0815, CVE-2018-0816, CVE-2018-0817, CVE-2018-0868, CVE-2018-0877, CVE-2018-0878, CVE-2018-0880, CVE-2018-0881, CVE-2018-0882, CVE-2018-0883, CVE-2018-0884, CVE-2018-0885, CVE-2018-0888, CVE-2018-0894, CVE-2018-0895, CVE-2018-0896, CVE-2018-0897, CVE-2018-0898, CVE-2018-0899, CVE-2018-0900, CVE-2018-0901, CVE-2018-0902, CVE-2018-0904, CVE-2018-0926, CVE-2018-0977, CVE-2018-0983

  CVSS Scores

  Base 7.6 / Temporal 6.3

  Description

  Microsoft has released Cumulative Security Updates for Windows which addresses the following vulnerabilities:

  An information disclosure vulnerability exists in the Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (ASLR) bypass. (CVE-2018-0897, CVE-2018-0898, CVE-2018-0899, CVE-2018-0900)
  An information disclosure vulnerability exists when the Windows kernel improperly initializes objects in memory.(CVE-2018-0811,CVE-2018-0813,CVE-2018-0814)
  An elevation of privilege vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. (CVE-2018-0815,CVE-2018-0816)
  
  

  QID Detection Logic (Authenticated):
  Operating Systems: Windows Server 2008, Windows Server 2008 R2, Windows 7, Windows 8.1, Windows RT 8.1, Windows10, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016
  This QID checks for following file versions %windir%\System32\Win32k.sys.exe for all affected OS ecxcept Windows 10 and Windows 16:-
  The patch version of 6.0.6002.24321 (KB4089344)
  The patch version of 6.1.7601.24059 (KB4088875 or KB4088878)
  The patch version of 6.2.9200.22376 (KB4088877 or KB4088880)
  The patch version of 6.3.9600.18954 (KB4088876 or KB4088879)
  
  
  This QID checks for following file versions %windir%\System32\Win32kfull.sys.exe for Windows 10 and Windows 16:-
  The patch version of 10.0.10240.17797 (KB4088786)
  The patch version of 10.0.10586.1478 (KB4088779)
  The patch version of 10.0.14393.2125 (KB4088787)
  The patch version of 10.0.15063.966 (KB4088782)
  The patch version of 10.0.16299.309 (KB4088776)
  
  
  This QID checks for following files and its versions for Windows 2008 SP2:-
  The patch version of %windir%\System32\Advapi32.dll 6.0.6002.24311 (KB4089229)
  The patch version of %windir%\System32\Msi.dll 4.5.6002.24299 (KB4087398)
  The patch version of %windir%\system32\Msra.exe 6.0.6002.24305 (KB4089453)
  The patch version of %windir%\System32\drivers\Vmms.exe 6.0.6002.24302 (KB4088827)
  The patch version of %windir%\system32\drivers\Vmswitch.sys 6.0.6002.24302 (KB4073011)
  The patch version of %%windir%\winsxs\*\Zipfldr.dll 6.0.6002.24305 (KB4089175)
  

  Consequence

  Successful exploitation allows an attacker to execute arbitrary code and take control of an affected system.

  Solution

  Customers are advised to refer to Microsoft Security Guidance for more details pertaining to this vulnerability.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  KB4056564
  KB4073011
  KB4087398
  KB4088776
  KB4088779
  KB4088782
  KB4088786
  KB4088787
  KB4088827
  KB4088875
  KB4088876
  KB4088877
  KB4088878
  KB4088879
  KB4088880
  KB4089175
  KB4089229
  KB4089344
  KB4089453

• Microsoft Windows CredSSP updates for March 2018

  Severity

  Critical 4

  Qualys ID

  91438

  Vendor Reference

  CVE-2018-0886, KB4093492

  CVE Reference

  CVE-2018-0886

  CVSS Scores

  Base 7.6 / Temporal 6

  Description

  Credential Security Support Provider protocol (CredSSP) is an authentication provider that processes authentication requests for other applications.

  A remote code execution vulnerability exists in unpatched versions of CredSSP.

  Affected Windows versions:
  Microsoft Windows 10
  Microsoft Windows 7
  Microsoft Windows 8.1
  Microsoft Windows RT 8.1
  Microsoft Windows Server 2016
  Microsoft Windows Server 2012 including R2
  Microsoft Windows Server 2008 including R2

  QID Detection Logic (Authenticated):
  Operating Systems: Windows Server 2008, Windows Server 2008 R2, Windows 7, Windows 8.1, Windows RT 8.1, Windows10, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016
  This QID checks for following files for patched version for all affected OS
  Tspkg.dll file for KB4056564, KB4088779, KB4103716
  Win32k.sys file for KB4103712, KB4103718, KB4103725, KB4103715, KB4103726, KB4103730
  win32kfull.sys file for KB4103721, KB4103723, KB4103727, KB4103731

  Consequence

  An attacker who successfully exploits this vulnerability could relay user credentials to execute code on the target system.
  Any application that depends on CredSSP for authentication may be vulnerable to this type of attack.

  Solution

  The security update addresses the vulnerability by correcting how CredSSP validates requests during the authentication process.

  To be fully protected against this vulnerability users must enable Group Policy settings on their systems and update their Remote Desktop clients. Further details can be found at KB4093492.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  KB4093492

Access for Qualys Customers

Platforms and Platform Identification

Technical Support

For more information, customers may contact Qualys Technical Support.

About Qualys

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