Tag Archives: Microsoft .Net Framework

January 2020 Update Summary

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Update: 11th February 2020
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This Internet Explorer zero day (defined) vulnerability was resolved by the patch released by Microsoft today. If you use Internet Explorer (especially versions 8 or earlier), please install this update as soon as possible.

Thank you.

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Update: 27th January 2020
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Shortly after the release of Microsoft’s scheduled updates, on the 17th of January they issued a security advisory for a critical zero day (defined) vulnerability being exploited by attackers in targeted attacks.

An out of bound update has not been released by Microsoft since by default all support versions of Internet Explorer by default use Jscript9.dll rather than Jscript.dll However versions earlier then IE 9 face increased risk.

If you use Internet Explorer for day to day work or just general surfing, please consider implementing the workaround described within Microsoft’s security advisory. Please remember to remove the workaround prior to installing the relevant security update in February. Also, please note that this workaround is causing some printers not to print and the Microsoft Print To PDF function not to work. If this is the case, use another browser and disable the workaround or use the micropatch (discussed below).

An alternative which according to ghacks.net is free is to install the micro-patch for IE available from 0Patch. More information on the micropatch and how to install it is available in the previous link above. This micropatch does not come with side effects. A YouTube video of the micropatch in action is available from the following link:

https://youtu.be/ixpBN_a2cHQ

Thank you.

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Original Post
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Happy New Year to my dedicated readers!

Today Adobe and Microsoft released their first security updates of the year. Adobe resolved 9 vulnerabilities more formally known as CVEs (defined) with Microsoft addressing 50 vulnerabilities.

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Adobe
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Adobe Experience Manager: 4x Priority 2 CVEs resolved (3x Important severity, 1x Moderate severity)

Adobe Illustrator CC: 5x Priority 3 CVEs resolved (5x Critical severity)

If you use the above Adobe products, please install these updates (especially in the case of the above critical vulnerabilities within Illustrator CC).
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Inside Microsoft’s monthly summary; there are Known Issues for 9 Microsoft products but all have workarounds (some workarounds will be replaced by further updates).

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US Computer Emergency Readiness Team (CERT) (please see the “Information on Security Updates” heading of the “Protecting Your PC” page):

https://www.us-cert.gov/

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For this month’s Microsoft updates, I will prioritize the order of installation below:
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Windows CryptoAPI Spoofing Vulnerability: CVE-2020-0601 (disclosed by the NSA to Microsoft). Further information on this vulnerability is available from KrebsonSecurity, within this CERT advisory and the detailed NSA PDF.

Windows Remote Desktop Gateway (RD Gateway) Remote Code Execution Vulnerability: CVE-2020-0609

Windows Remote Desktop Gateway (RD Gateway) Remote Code Execution Vulnerability: CVE-2020-0610

Remote Desktop Client Remote Code Execution Vulnerability: CVE-2020-0611

.NET Framework Remote Code Execution Injection Vulnerability: CVE-2020 0605

.NET Framework Remote Code Execution Injection Vulnerability: CVE-2020-0606

.NET Framework Remote Code Execution Injection Vulnerability: CVE-2020-0646

Please install the remaining less severe updates at your earliest convenience.

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Microsoft Edge Chromium
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Tomorrow, 15th January will mark the release of a new version of Microsoft Edge powered by the Chromium rendering engine. This version will be available for Windows 7, 8.1 and 10. This is especially relevant for Windows 7, Windows Server 2008 and Server 2008 R2 since while Windows itself ends its support lifecycle today, Edge Chromium will continue to be supported for a further 18 months. This matches similar statements from Google regarding Chrome and separately Vivaldi.

For details of which versions of Windows 10 will receive the new Edge via Windows Update and which versions will need to download it separately, please refer to this link. I wish to extend my thanks to Softpedia and Bleepingcomputer.com for these really useful links.

If for any reason, you wish to use the previous version of Edge (which uses the legacy rendering engine, please see this link for details of how to run the older version alongside its modern equivalent).

As per standard best practice; I would recommend backing up the data on any device for which you are installing updates to prevent data loss in the rare event that any update causes unexpected issues.

I have provided further details of updates available for other commonly used applications below.

Thank you.

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Mozilla Firefox
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In early January Mozilla released new versions of Firefox to address the following vulnerabilities and to add new user privacy features:

Firefox 72.0: Resolves 5x high severity CVEs (defined), 5x moderate CVEs and 1x low CVE

Firefox ESR 68.4 (Extended Support Release): Resolves 4x high severity CVEs and 2x moderate CVEs

More recently Firefox 72.0.1 was released to address a single critical severity zero day (defined) vulnerability which was responsibly disclosed to Mozilla and fixed very quickly. Finally Firefox 72.0.2  was released on the 20th of January resolving inconsistent playback of full-screen HD videos among non-security other issues.

Highlights from version 72 of Firefox include:
In addition to picture in picture enabled by default for macOS and Linux, it blocks the use of fingerprinting by default (the collection of data from your system e.g. browser version, font size, screen resolution and other unique data. This protection is provided by Disconnect. There are multiple levels of fingerprinting protection provided with the standard level being enabled by default. The strict level however may lead to websites not functioning as expected. Further details are available here.

Details of how to install updates for Firefox are here. If Firefox is your web browser of choice, if you have not already done so, please update it as soon as possible to benefit from the above changes.

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Wireshark
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In mid-January the following Wireshark updates were released:

v3.2.1: Relating to 1 security advisory

v3.0.8: Relating to 1 security advisory

As per standard process Linux distributions can obtain this update using the operating systems standard package manager (if the latest version is not installed automatically using the package manager you can instead compile the source code (v3.2.1 or v3.0.8). This forum thread and this forum thread may also be helpful to you with installing Wireshark on your Linux based system.

For Mac OS X and Windows, the update is available within the downloads section of the Wireshark website. In addition, a detailed FAQ for Wireshark is available here.

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Google Chrome
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Google made available two security updates during November; the first resolves 3 vulnerabilities while the second resolves 16 vulnerabilities. The second also provides mitigation for the vulnerability disclosed by the NSA to Microsoft more commonly known as the  Chain of Fools/CurveBall or CVE-2020-0601 This test page from SANS will then show your system is no longer vulnerable after applying the second update. Please still apply the update from Microsoft to provide the most protection, Google’s changes are a mitigation only.

Google Chrome updates automatically and will apply the update the next time Chrome is closed and then re-opened. Chrome can also be updated immediately by clicking the Options button (it looks like 3 vertically stacked dots) in the upper right corner of the window and choosing “About Google Chrome” from the menu. Follow the prompt to Re-launch Chrome for the updates to take effect.

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VMware
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VMware released 2 security advisories in January , the first is of moderate severity with the second being of important severity. The advisories relate to the following products:

Moderate Severity Advisory:

Workspace ONE SDK

Workspace ONE Boxer

Workspace ONE Content

Workspace ONE SDK Plugin for Apache Cordova

Workspace ONE Intelligent Hub

Workspace ONE Notebook

Workspace ONE People

Workspace ONE PIV-D

Workspace ONE Web

Workspace ONE SDK Plugin for Xamarin

Important Severity Advisory:
VMware Tools

If you use the above VMware products, please review the advisories and apply the necessary updates.

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Oracle:
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Oracle issued updates to resolve 334 vulnerabilities in January 2020. Further details and installation steps are available here. 12 vulnerabilities affect the Java runtime; all of which are remotely exploitable without an attacker needing to obtain a user’s username and password (their credentials).

If you use any of the Oracle products listed here, please install the appropriate security updates as soon as possible.

July 2019 Update Summary

As predicted; earlier today Adobe and Microsoft made available their usual monthly security updates addressing 5 and 77 vulnerabilities (respectively) more formally known as CVEs (defined):

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Adobe Bridge CC: 1x Priority 3 vulnerability resolved (Important severity)

Adobe Dreamweaver: 1x Priority 3 vulnerability resolved (Important severity)

Adobe Experience Manager: 3x Priority 2 vulnerabilities : 2x Important, 1x Moderate severity resolved

If you use any of these Adobe products, please apply the necessary updates as soon as possible.

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This month’s list of Known Issues from Microsoft is available within their monthly summary page and applies to all currently supported operating systems. Not all issues have workarounds at this time. Just like last month; Windows 7 SP1, Windows Server 2008 R2 SP1 and Windows 8.1 and Windows Server 2012 R2 list known issues with McAfee products and should refer to the guidance linked to by Microsoft within the above linked to attempt to workaround these issues:

4493730                Servicing stack update for Windows Server 2008 SP2

4507434                Internet Explorer 11

4507435                Windows 10, version 1803

4507448                Windows 8.1, Windows Server 2012 R2 (Monthly Rollup)

4507449                Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Monthly Rollup)

4507450                Windows 10, version 1703

4507453                Windows 10, version 1903, Windows Server version 1903

4507455                Windows 10, version 1709

4507457                Windows 8.1, Windows Server 2012 R2 (Security-only update)

4507458                Windows 10

4507460                Windows 10 1607 and Windows Server 2016

4507462                Windows Server 2012 (Monthly Rollup)

4507464                Windows Server 2012 (Security-only update)

4507469                Windows 10, version 1809, Windows Server 2019

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US Computer Emergency Readiness Team (CERT) (please see the “Information on Security Updates” heading of the “Protecting Your PC” page):

https://www.us-cert.gov/

A further useful source of update related information is the Calendar of Updates.

News/announcements of updates in the categories of General SoftwareSecurity Software and Utilities are available on their website. The news/announcements are very timely and (almost always) contain useful direct download links as well as the changes/improvements made by those updates (where possible).

If you like and use it, please also consider supporting that entirely volunteer run website by donating.

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For this month’s Microsoft updates, I will prioritize the order of installation below:
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Zero-day (defined) vulnerabilities:
CVE-2019-1132 – Win32k Elevation of Privilege Vulnerability

CVE-2019-0880 – Microsoft splwow64 Elevation of Privilege Vulnerability

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Critical
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CVE-2019-0785  Windows DHCP Server Remote Code Execution Vulnerability

CVE-2019-1072  Azure DevOps Server and Team Foundation Server Remote Code Execution Vulnerability

CVE-2019-1056  Scripting Engine

CVE-2019-1106  Scripting Engine

CVE-2019-1092  Scripting Engine

CVE-2019-1103  Scripting Engine

CVE-2019-1107  Scripting Engine

CVE-2019-1062  Scripting Engine

CVE-2019-1004  Scripting Engine

CVE-2019-1001  Scripting Engine

CVE-2019-1063  Internet Explorer Memory Corruption Vulnerability

CVE-2019-1104  Microsoft Browser Memory Corruption Vulnerability

CVE-2019-1102  GDI+ Remote Code Execution Vulnerability

CVE-2019-1113  .NET Framework Remote Code Execution Vulnerability

Servicing Stack Update

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Please install the remaining updates at your earliest convenience.

As per standard best practice; I would recommend backing up the data on any device for which you are installing updates to prevent data loss in the rare event that any update causes unexpected issues.

I have provided further details of updates available for other commonly used applications below.

Thank you.

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Mozilla Firefox
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Today, Mozilla released Firefox 68.0 to address the following vulnerabilities and to introduce new features:

Firefox 68.0: Resolves 2x critical CVEs (defined), 3x high CVEs, 10x moderate and 4x low CVEs

Firefox 60.8 ESR (Extended Support Release): Resolves 1x critical CVE, 4x high CVEs and 5x moderate CVEs

Firefox now also includes cryptomining protection and fingerprinting protections and improved add-on security (my thanks to Softpedia for this information, more details on other security features are here).

Details of how to install updates for Firefox are here. If Firefox is your web browser of choice, if you have not already done so, please update it as soon as possible to benefit from the above changes.

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VMware ESXi
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Earlier today VMware made available an update for ESXi version 6.5. Version 6.0 is unaffected and a patch for 6.7 is pending. This update resolves a denial of service vulnerability.

If you use VMware ESXi, please update when you can.

Thank you.

April 2017 Security Updates Summary

As expected earlier today Microsoft and Adobe released their scheduled monthly security updates.

Microsoft’s set of updates are much lighter in volume this month addressing 45 vulnerabilities more formally known as CVEs (defined). These are detailed within Microsoft’s new Security Updates Guide.

This month sees four known issues listed for this months updates all relating to the AMD Carrizo processor experiencing an issue which prevents the installation of future Windows Updates. Microsoft states in all four knowledge base articles (listed below) they are aware of this issue and are working to resolve it in upcoming updates:

KB4015549
KB4015546
KB4015550
KB4015547

At the time of writing the IT Pro Patch Tuesday blog does not list any Known Issues (although it has not been updated since November 2016, I’m unsure why).

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Adobe issued five security bulletins today affecting the following products:

Adobe Campaign (1x priority 2 CVE)
Adobe Flash Player (7x priority 1 CVEs)
Adobe Acrobat and Reader (47x priority 2 CVEs)
Adobe Photoshop (2x priority 3 CVEs)
Adobe Creative Cloud Desktop (2x priority 3 CVEs)

The priority ratings are explained in this link. Depending on which version of Flash Player you have, please review the Adobe security bulletin or Microsoft bulletin as appropriate and apply the recommended updates. Google Chrome users will have the updated version installed automatically later this week.

If you use any of the above-mentioned Adobe products, please review the security bulletins linked to above and apply the necessary updates. The Flash update should be installed as soon as possible since exploit kits (defined) tend to take advantage of newly disclosed vulnerabilities very quickly.

You can monitor the availability of security updates for most your software from the following websites (among others) or use Secunia PSI:
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US Computer Emergency Readiness Team (CERT) (please see the “Information on Security Updates” heading of the “Protecting Your PC” page):

https://www.us-cert.gov/

A further useful source of update related information is the Calendar of Updates. News/announcements of updates in the categories of General Software, Security Software and Utilities are available on their website. The news/announcements are very timely and (almost always) contain useful direct download links as well as the changes/improvements made by those updates (where possible).

If you like and use it, please also consider supporting that entirely volunteer run website by donating.

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Update: 8th May 2017:
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I wish to provide information on other notable updates from April 2017 which I would recommend you install if you use these software products:

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Skype: While the Skype update to version 7.34.0.102 was released in March; details of the vulnerability it addressed were not made public until April.
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Putty 0.69: while released in March; it contains important security changes. It is downloadable from here.
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Wireshark 2.2.6 and 2.0.12
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As per standard process Linux distributions can obtain this update using the operating systems standard package manager (if the latest version is not installed automatically using the package manager you can instead compile the source code (v2.2.6) or v2.0.12). This forum thread and this forum thread may also be helpful to you with installing Wireshark on your Linux based system.

For Mac OS X and Windows, the update is available within the downloads section of the Wireshark website. In addition, a detailed FAQ for Wireshark is available here.
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Oracle:
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There was a record 299 vulnerabilities addressed by Oracle’s updates in April. Further details and installation steps are available here. A useful summary post from Qualys is here. Of the 299 fixes, 8 vulnerabilities were addressed in the Java runtime.

If you use any of the Oracle products listed here, please install the appropriate security updates as soon as possible.
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Mozilla Firefox:
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Firefox 53.0 and Firefox 53.0.2

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Mozilla Firefox ESR:
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Firefox ESR 45.9 and Firefox ESR 52.1.

Details of how to install updates for Firefox are here. If Firefox is your web browser of choice, please update it as soon as possible to resolve these security issues.

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Google Chrome:
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Google Chrome: includes 29 security fixes:

Google Chrome updates automatically and will apply the update the next time Chrome is closed and then re-opened. Chrome can also be updated immediately by clicking the Options button (it looks like 3 stacked small horizontal lines, sometimes called a “hamburger” button) in the upper right corner of the window and choosing “About Google Chrome” from the menu. Follow the prompt to Re-launch Chrome for the update to take effect.
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Adobe Coldfusion:
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Adobe Coldfusion: 2x priority 2 vulnerabilities resolved.

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If you use any of the above software, please install the appropriate updates as soon as possible. Steps for installing updates for Windows are provided on the “Protecting Your PC” page.

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For the Microsoft updates this month, I will prioritize the order of installation for you below:

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Critical severity:
Microsoft Office and Windows WordPad (due to a previously disclosed zero day vulnerability (defined))
Microsoft Edge
Internet Explorer
Microsoft .Net Framework
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Install the remaining updates at your earliest convenience.

As always you can find detailed information on the contents of each security bulletin within ComputerWorld’s Patch Tuesday Debugged column.

Another security pre-caution that you may wish to take if you have Microsoft EMET (please ensure your version of EMET is the most recent version 5.52) installed is to use it to protect you from Adobe Flash being used to exploit vulnerabilities when you open a Microsoft Office document or Adobe PDF file. I provide recommendations of how to do this at the end of the July 2015 Update Summary. Please note that Microsoft EMET will be out of support on the 31st of July 2018.

As is my standard practice, I would recommend backing up the data on any device for which you are installing updates to prevent data loss in the rare event that any update causes unexpected issues.

Thank you.

Microsoft Announces End of Support for Older Versions of Internet Explorer and .Net Framework

Later this month on the 12th of January Microsoft will be changing the versions of Internet Explorer that they provide security updates for. This was briefly mentioned in a previous post of mine.

This means that in order to continue to receive security updates for Internet Explorer you need to have the most recent version of Internet Explorer installed for your version of Windows. Microsoft provides a table within this post which shows the supported Internet Explorer versions for each version of Windows. A detailed FAQ on the changes is also provided here.

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Internet Explorer is not the only Microsoft product that will have a change in the supported versions on the 12th of January. The .Net Framework will also see changes. Specifically, v4.0, v4.5 and v4.5.1 will no longer receive security updates from that date going forward.

This does not affect versions 3.5 and 3.5.1. Microsoft has provided further details and an FAQ within a blog post. That post suggests upgrading to version 4.5.2 or later of the .Net Framework and give details of how to check which version of the Framework that you currently have installed on your system. Download links for the updated versions are also provided.

For details of the changes in versions 4.5 and later of the .Net Framework, please refer to this knowledge base article.

I have checked the version of the .Net Framework that is installed on my Windows systems and it’s 4.5.2. If I recall correctly, it was offered as an Important update (along with the routine updates) in January 2015 and I opted to install it at that time. While that version will continue to receive updates, I will test 4.6.1 and migrate to it should my applications continue to work as normal.

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Update: 10th January 2016:
Further discussion and information concerning the end of support for older versions of Internet Explorer is provided here and here.

In addition, according to the Sophos blog post linked to above (the first discussion provided) Windows 8.0 will no longer be supported as of the 12th of January 2016. Please update at no charge to Windows 8.1 as soon as possible if you are using Windows 8.0. See question 7 and the answer of this FAQ for more details.

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Update: 10th February 2016:
Yesterday Microsoft made available the .Net Framework version 4.6.1 as an Important update shown within Windows Update for any Windows system that does not already have it installed.

I completed the testing of 4.6.1 on all of my personal systems more than 2 weeks ago and my .Net applications continue to work as normal.
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I hope that the above links and information are useful to you in installing any upgrades to Internet Explorer and/or the .Net Framework that may be applicable to you in order to receive security updates for those products going forward.

Thank you.

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Aside:
The version of the .Net Framework installed on my systems is 4.5.2 since I haven’t yet migrated to Windows 10 but hope to do so later this year. I’m using Windows 8.1 and Windows 7 at this time.
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