Microsoft security alert.

Advisory overview

Qualys Vulnerability R&D Lab has released new vulnerability checks in the Enterprise TruRisk Platform to protect organizations against 81 vulnerabilities that were fixed in 10 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 10 security bulletins to fix newly discovered flaws in their software. Qualys has released the following checks for these new vulnerabilities:

• Microsoft Windows Adobe Flash Player Security Update for October 2020 (ADV200012)

  Severity

  Critical 4

  Qualys ID

  100411

  Vendor Reference

  ADV200012

  CVE Reference

  CVE-2020-9746

  CVSS Scores

  Base 9.3 / Temporal 6.9

  Description

  The update contains security fixes for Adobe Flash Player on Internet Explorer.

  Affected Versions:
  Windows 10, version 2004,Windows 10, version 1903 and 1909,Windows 10, version 1809 and Windows Server 2019,Windows 10, version 1803,Windows 10, version 1709,Windows 10, version 1703,Windows 10, version 1607 and Windows Server 2016,Windows 10 (initial version released July 2015),Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2,Windows Server 2012 with Adobe Flash Player version prior to N/A.

  QID Detection Logic:
  This authenticated QID will flag if file version of %windir%\System32\Macromed\Flash\Flash.ocx is 32.0.0.433 and earlier.

  Consequence

  An attacker could exploit this vulnerability to compromise Confidentiality, Integrity and/or Availability.

  Solution

  Customers are advised to follow 4580325 for instructions pertaining to the remediation of this vulnerability.

  Workaround:
  1. Prevent Adobe Flash Player from running You can disable attempts to instantiate Adobe Flash Player in Internet Explorer and other applications that honor the kill bit feature, such as Office 2007 and Office 2010, by setting the kill bit for the control in the registry.
  2. Windows Registry Editor Version 5.00
  [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{D27CDB6E-AE6D-11CF-96B8-444553540000}]
  "Compatibility Flags"=dword:00000400

  3. [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{D27CDB6E-AE6D-11CF-96B8-444553540000}]
  "Compatibility Flags"=dword:00000400
  Double-click the .reg file to apply it to an individual system.
  You can also apply this workaround across domains by using Group Policy. For more information about Group Policy, see the TechNet article, Group Policy collection.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  ADV200012 WIndows

• Microsoft SharePoint Foundation and SharePoint Server Update October 2020

  Severity

  Critical 4

  Qualys ID

  110363

  Vendor Reference

  KB4484531, KB4486676, KB4486677, KB4486687, KB4486694, KB4486708

  CVE Reference

  CVE-2020-16929, CVE-2020-16941, CVE-2020-16942, CVE-2020-16944, CVE-2020-16945, CVE-2020-16946, CVE-2020-16948, CVE-2020-16950, CVE-2020-16951, CVE-2020-16952, CVE-2020-16953

  CVSS Scores

  Base 6.8 / Temporal 5.6

  Description

  Microsoft has released October 2020 security updates to fix multiple security vulnerabilities.

  This security update contains the following KBs:

  KB4486708
  KB4486677
  KB4486676
  KB4486694
  KB4486687
  KB4484531

  QID Detection Logic:
  This authenticated QID checks the file versions from above Microsoft KB article with the versions on affected SharePoint system.

  Consequence

  Successful exploitation allows an attacker to execute code remotely.

  Solution

  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 SharePoint Foundation and SharePoint Server October 2020

• Microsoft Office and Microsoft Office Services and Web Apps Security Update October 2020

  Severity

  Critical 4

  Qualys ID

  110364

  Vendor Reference

  KB4462175, KB4484417, KB4484435, KB4484524, KB4486663, KB4486671, KB4486674, KB4486678, KB4486679, KB4486682, KB4486688, KB4486689, KB4486692, KB4486695, KB4486700, KB4486701, KB4486703, KB4486707

  CVE Reference

  CVE-2020-16918, CVE-2020-16928, CVE-2020-16929, CVE-2020-16930, CVE-2020-16931, CVE-2020-16932, CVE-2020-16933, CVE-2020-16934, CVE-2020-16947, CVE-2020-16949, CVE-2020-16954, CVE-2020-16955, CVE-2020-16957

  CVSS Scores

  Base 9.3 / Temporal 7.3

  Description

  Microsoft has released October 2020 security updates to fix multiple security vulnerabilities.

  This security update contains the following KBs:
  KB4486695
  KB4486707
  KB4486663
  KB4486678
  KB4486692
  KB4486703
  KB4486701
  KB4486674
  KB4486671
  KB4486679
  KB4486689
  KB4486682
  KB4484524
  KB4486700
  KB4486688
  KB4462175
  KB4484417
  KB4484435

  QID Detection Logic:
  This authenticated QID checks the file versions from the Microsoft advisory with the versions on affected office system.

  Note: Office click-2-run and Office 365 installations need to be either updated manually or need to be set to automatic update. There is no direct download for the patch.

  Consequence

  Successful exploitation allows an attacker to execute code remotely.

  Solution

  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 October 2020

• Microsoft Windows TCP/IP ICMPv6 RDNSS Disabled

  Severity

  Minimal 1

  Qualys ID

  45468

  Vendor Reference

  CVE-2020-16898

  CVE Reference

  N/A

  CVSS Scores

  Base / Temporal

  Description

  The host has "ICMPv6 RDNSS" disabled in the Windows TCP/IP settings.

  QID Detection Logic (Authenticated):
  This QID executes powershell command "netsh int ipv6 show interfaces level=verbose | Select-String -Pattern 'IfIndex\s+: ([2-9]|[0-9]{2,})' -Context 1,3000" , This QID will only flag when all interfaces except loopback have RDNSS disabled.

  NOTE: You may see this QID is supported by remote scanner (Appliance scan) and Cloud Agent in UI, but it is supported by Cloud Agent only.

  Consequence

  N/A

  Solution

  Use powershell command "netsh int ipv6 set int *INTERFACENUMBER* rabaseddnsconfig=disable" to disable RDNSS.

• Microsoft Exchange Server Security Update for October 2020

  Severity

  Serious 3

  Qualys ID

  50102

  Vendor Reference

  KB4581424

  CVE Reference

  CVE-2020-16969

  CVSS Scores

  Base 4.3 / Temporal 3.2

  Description

  An information disclosure vulnerability exists in how Microsoft Exchange validates tokens when handling certain messages.

  The security update corrects the way that Exchange handles these token validations.

  Affected Software:
  Microsoft Exchange Server 2013 Cumulative Update 23
  Microsoft Exchange Server 2016 Cumulative Update 17
  Microsoft Exchange Server 2016 Cumulative Update 18
  Microsoft Exchange Server 2019 Cumulative Update 6
  Microsoft Exchange Server 2019 Cumulative Update 7

  KB articles covered: 4581424.

  QID Detection Logic (authenticated):
  The QID checks for the version of file Exsetup.exe if it is lesser than:
  The version for Microsoft Exchange Server 2013 Cumulative Update 23 is
  The version for Microsoft Exchange Server 2016 Cumulative Update 17 is
  The version for Microsoft Exchange Server 2016 Cumulative Update 18 is
  The version for Microsoft Exchange Server 2019 Cumulative Update 6 is
  The version for Microsoft Exchange Server 2019 Cumulative Update 7 is

  Consequence

  Successful exploitation allows an attacker to leverage this vulnerability and gain further information from a user.

  Solution

  Customers are advised to refer to CVE-2020-16969 for information pertaining to this vulnerability.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  KB4581424

• Microsoft .NET Framework Security Updates for October 2020

  Severity

  Critical 4

  Qualys ID

  91682

  Vendor Reference

  KB4578968, KB4578969, KB4578971, KB4578972, KB4578974, KB4579976, KB4579977, KB4579978, KB4579979, KB4579980, KB4580327, KB4580328, KB4580330, KB4580467, KB4580468, KB4580469, KB4580470

  CVE Reference

  CVE-2020-16937

  CVSS Scores

  Base 4.3 / Temporal 3.2

  Description

  An information disclosure vulnerability exists when the .NET Framework improperly handles objects in memory.

  KB4578968,KB4578969,KB4578971,KB4578972,KB4578974,KB4579976,KB4579977,KB4579978,KB4579979,KB4579980,KB4580327,KB4580328,KB4580330,KB4580467,KB4580468,KB4580469,KB4580470 kbs are covered.

  This security update is rated Important for supported versions of Microsoft .NET Framework.

  .NET Framework 2.0, 3.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 and 4.8

  QID Detection Logic (Authenticated):
  - Checks for vulnerable version of System.security.dll for .Net Framework
  

  Consequence

  An attacker who successfully exploited the vulnerability can disclose contents of an affected system's memory.

  Solution

  Customers are advised to refer to CVE-2020-16937 for more details pertaining to this vulnerability.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  CVE-2020-16937

• Microsoft Windows Security Update for October 2020

  Severity

  Critical 4

  Qualys ID

  91683

  Vendor Reference

  KB4577668, KB4577671, KB4579311, KB4580327, KB4580328, KB4580330, KB4580345, KB4580346, KB4580347, KB4580353, KB4580358, KB4580378, KB4580382, KB4580385, KB4580387

  CVE Reference

  CVE-2020-0764, CVE-2020-1047, CVE-2020-1080, CVE-2020-1167, CVE-2020-1243, CVE-2020-16863, CVE-2020-16876, CVE-2020-16877, CVE-2020-16885, CVE-2020-16887, CVE-2020-16889, CVE-2020-16890, CVE-2020-16891, CVE-2020-16892, CVE-2020-16894, CVE-2020-16895, CVE-2020-16896, CVE-2020-16897, CVE-2020-16899, CVE-2020-16900, CVE-2020-16901, CVE-2020-16902, CVE-2020-16905, CVE-2020-16907, CVE-2020-16909, CVE-2020-16910, CVE-2020-16911, CVE-2020-16912, CVE-2020-16913, CVE-2020-16914, CVE-2020-16915, CVE-2020-16916, CVE-2020-16919, CVE-2020-16920, CVE-2020-16921, CVE-2020-16922, CVE-2020-16923, CVE-2020-16924, CVE-2020-16927, CVE-2020-16935, CVE-2020-16936, CVE-2020-16938, CVE-2020-16939, CVE-2020-16940, CVE-2020-16967, CVE-2020-16968, CVE-2020-16972, CVE-2020-16973, CVE-2020-16974, CVE-2020-16975, CVE-2020-16976, CVE-2020-16980

  CVSS Scores

  Base 9.3 / Temporal 7.7

  Description

  Microsoft releases the security update for Windows October 2020

  The KB Articles associated with the update:
  KB4580385
  KB4577668
  KB4580358
  KB4580353
  KB4580378
  KB4580347
  KB4580387
  KB4580346
  KB4580330
  KB4580382
  KB4580345
  KB4577671
  KB4580327
  KB4580328
  KB4579311
  

  QID Detection Logic (Authenticated):
  

  This QID checks for the file version of ntoskrnl.exe

  The following versions of ntoskrnl.exe with their corresponding KBs are verified:
  KB4580385 - 6.0.6003.20953
  KB4577668 - 10.0.17763.1518
  KB4580358 - 6.3.9600.19846
  KB4580353 - 6.2.9200.23179
  KB4580378 - 6.0.6003.20953
  KB4580347 - 6.3.9600.19846
  KB4580387 - 6.1.7601.24561
  KB4580346 - 10.0.14393.3986
  KB4580330 - 10.0.17134.1792
  KB4580382 - 6.2.9200.23179
  KB4580345 - 6.1.7601.24561
  KB4577671 - 10.0.18362.1139
  KB4580327 - 10.0.10240.18725
  KB4580328 - 10.0.16299.2166
  KB4579311 - 10.0.19041.572
  

  Consequence

  An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.

  Solution

  Please refer to the Security Update Guide for more information pertaining to these vulnerabilities.

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

• Microsoft Windows Servicing Stack Security Update October 2020

  Severity

  Medium 2

  Qualys ID

  91684

  Vendor Reference

  ADV990001

  CVE Reference

  N/A

  CVSS Scores

  Base 3.7 / Temporal 2.7

  Description

  Servicing stack updates improve the reliability of the update process to mitigate potential issues while installing the latest quality updates and feature updates. If you don't install the latest servicing stack update, there's a risk that your device can't be updated with the latest Microsoft security fixes.

  Microsoft has released Servicing Stack security updates for Windows.

  QID Detection Logic (Authenticated):
  This authenticated QID will check for file version of CbsCore.dll

  Consequence

  Successful exploitation may allow unauthorized disclosure of information, unauthorized modification or disruption of service.

  Solution

  Customers are advised to refer to advisory ADV990001 for more information.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  ADV990001

• Microsoft Dynamics 365 Security Update for October 2020

  Severity

  Critical 4

  Qualys ID

  91685

  Vendor Reference

  KB4578105, KB4578106

  CVE Reference

  CVE-2020-16956, CVE-2020-16978

  CVSS Scores

  Base 3.5 / Temporal 2.6

  Description

  The following vulnerabilities exist in Microsoft Dynamics 365 (on-premises) and Dynamics 365 Commerce:
  CVE-2020-16956, CVE-2020-16978: A cross site scripting vulnerability exists when Microsoft Dynamics 365 (on-premises) does not properly sanitize a specially crafted web request to an affected Dynamics server.

  Affected Versions:
  Microsoft Dynamics 365 (on-premises) version 8.2
  Microsoft Dynamics 365 (on-premises) version 9.0

  KB Articles: KB4578105, KB4578106

  QID Detection Logic:
  This authenticated QID flags vulnerable systems by detecting Microsoft.Crm.Setup.Server.exe versions lesser than:
  Microsoft Dynamics 365 (on-premises) version 8.2: 8.2.23.16
  Microsoft Dynamics 365 (on-premises) version 9.0: 9.0.21.8

  Consequence

  Depending on the vulnerability being exploited, an attacker to conduct cross-site scripting attacks or update data without proper authorization.

  Solution

  Customers are advised to refer to KB4578105, KB4578106, for more details pertaining to these vulnerabilities.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  KB4578105
  KB4578106
  Release Notes

• Microsoft Windows TCP/IP Remote Code Execution Vulnerability

  Severity

  Urgent 5

  Qualys ID

  91686

  Vendor Reference

  CVE-2020-16898

  CVE Reference

  CVE-2020-16898

  CVSS Scores

  Base 5.8 / Temporal 4.6

  Description

  A remote code execution vulnerability exists when the Windows TCP/IP stack improperly handles ICMPv6 Router Advertisement packets.

  The update addresses the vulnerability by correcting how the Windows TCP/IP stack handles ICMPv6 Router Advertisement packets.

  QID Detection Logic (Authenticated):
  

  This QID checks for the file version of ntoskrnl.exe

  The following versions of "tcpip.sys" with their corresponding KBs are verified:
  KB4577668 - 10.0.17763.1518
  KB4577671 - 10.0.18362.1139
  KB4579311 - 10.0.19041.572
  KB4580328 - 10.0.16299.2166
  KB4580330 - 10.0.17134.1792
  

  Consequence

  An attacker who successfully exploited this vulnerability could gain the ability to execute code on the target server or client.

  Solution

  Please refer to the CVE-2020-16898 for more information pertaining to these vulnerabilities.

  Patches:
  The following are links for downloading patches to fix these vulnerabilities:
  CVE-2020-16898 WIndows

Access for Qualys Customers

Platforms and Platform Identification

Technical Support

For more information, customers may contact Qualys Technical Support.

About Qualys

The Enterprise TruRisk 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.