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patches\u003C/a>\u003C/strong>\u003C/p>",[474,475],{"id":286,"title":287},{"id":283,"title":284},{"id":477,"title":478,"description":479,"plans":480},"MJlLPyxqTcy9ys2UaZYNKQ","Windows 10 v1909 patches","\u003Cp>Windows 10 1909 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+10\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows 10 patches\u003C/a>\u003C/strong>\u003C/p>",[481,482],{"id":283,"title":284},{"id":286,"title":287},{"id":484,"title":485,"description":486,"plans":487},"GscjCa1TQOe5p5Or7g2qyw","Windows 10 v1809 patches","\u003Cp>Windows 10 1809 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+10\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows 10 patches\u003C/a>\u003C/strong>\u003C/p>",[488,489],{"id":283,"title":284},{"id":286,"title":287},{"id":491,"title":492,"description":493,"plans":494},"OeQ8xMmJTmadIiPcKYkhvw","Windows 10 v1803 patches","\u003Cp>Windows 10 1803 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+10\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows 10 patches\u003C/a>\u003C/strong>\u003C/p>",[495,496],{"id":283,"title":284},{"id":286,"title":287},{"id":498,"title":499,"description":500,"plans":501},"Obe8z8snRYGoLT6BZyzhZw","Windows 7 post-EOS and post-ESU patches","\u003Cp>Windows 7 post-end-of-support patches, for computers without Extended Security Updates (ESU), or computers with any full year of ESU updates installed\u003C/p>",[502,503],{"id":283,"title":284},{"id":286,"title":287},"Windows Patches","DXze3dvpTu-HF132vKjSug","microsoft-windows-xp",{"alt":508,"url":509,"width":510,"height":510,"responsiveImage":511},"Windows 11 logo","https://www.datocms-assets.com/166020/1764600963-win11.png",300,{"srcSet":512,"webpSrcSet":513,"sizes":514,"src":515,"width":516,"height":516,"aspectRatio":210,"alt":508,"title":18,"bgColor":517,"base64":518},"https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&fit=crop&h=40 40w,https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&dpr=1.5&fit=crop&h=40 60w,https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&dpr=2&fit=crop&h=40 80w,https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&dpr=3&fit=crop&h=40 120w,https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&dpr=4&fit=crop&h=40 160w","https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&fit=crop&fm=webp&h=40 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Server 2012 R2 post-EOS patches","\u003Cp>Windows Server 2012 R2 post-end-of-support patches, for computers without Extended Security Updates (ESU), or computers with any full year of ESU updates installed\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+Server+2012+R2\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows Server 2012 R2 patches\u003C/a>\u003C/strong>\u003C/p>",[529,530],{"id":283,"title":284},{"id":286,"title":287},{"id":532,"title":533,"description":534,"plans":535},"ZaeezXKkT3KGln5CQ4NH9w","Windows Server 2012 post-EOS patches","\u003Cp>Windows Server 2012 post-end-of-support patches, for computers without Extended Security Updates (ESU), or computers with any full year of ESU updates installed\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+Server+2012\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows Server 2012 patches\u003C/a>\u003C/strong>\u003C/p>",[536,537],{"id":283,"title":284},{"id":286,"title":287},{"id":539,"title":540,"description":541,"plans":542},"RYxw9xwXR3-OWnsdr8dFEg","Windows Server 2008 R2 post-EOS and post-ESU patches","\u003Cp>Windows Server 2008 R2 post-end-of-support patches, for computers without Extended Security Updates (ESU), or computers with any full year of ESU updates installed\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+Server+2008+R2\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows Server 2008 R2 patches\u003C/a>\u003C/strong>\u003C/p>",[543,544],{"id":283,"title":284},{"id":286,"title":287},"Windows Server Patches","J7WLPCrKS7i7B8sAyJpKWg","microsoft-windows-vista",{"alt":549,"url":550,"width":551,"height":510,"responsiveImage":552},"Windows Server 2012-2022 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Office 2019 post-EOS patches","\u003Cp>Microsoft Office 2019 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Office+2019\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Microsoft Office 2019 patches\u003C/a>\u003C/strong>\u003C/p>",[570,571],{"id":283,"title":284},{"id":286,"title":287},{"id":573,"title":574,"description":575,"plans":576},"MkFk40IJQhCcXnIO2ZDd4Q","Microsoft Office 2016 post-EOS patches","\u003Cp>Microsoft Office 2016 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Office+2016\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Microsoft Office 2016 patches\u003C/a>\u003C/strong>\u003C/p>",[577,578],{"id":283,"title":284},{"id":286,"title":287},{"id":580,"title":581,"description":582,"plans":583},"FFqWfGxfQF2q0uyjyRjVWg","Microsoft Office 2013 post-EOS patches","\u003Cp>Microsoft Office 2013 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Office+2013\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Microsoft Office 2013 patches\u003C/a>\u003C/strong>\u003C/p>",[584,585],{"id":283,"title":284},{"id":286,"title":287},{"id":587,"title":588,"description":589,"plans":590},"XFYgrsOyRpeuEXk29M4z9g","Microsoft Office 2010 post-EOS patches","\u003Cp>Microsoft Office 2010 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Office+2010\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Microsoft Office 2010 patches\u003C/a>\u003C/strong>\u003C/p>",[591,592],{"id":283,"title":284},{"id":286,"title":287},"Microsoft Office Patches","VH2unwR4RjycDA1o_6eSFw","microsoft-windows-7",{"alt":597,"url":598,"width":510,"height":510,"responsiveImage":599},"Microsoft Office 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products patches","\u003Cp>We occasionally patch other Windows products, for instance when a critical vulnerability becomes known and the vendor does not provide an official patch in a timely manner\u003C/p>",[613],{"id":283,"title":284},"Other","BrWA-hAsQYSROgTvF-1ecA","microsoft-windows-11",{"alt":618,"url":619,"width":620,"height":621,"responsiveImage":18},"Windows 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CVE-2021-33742","https://i.ytimg.com/vi/sEUFADJtcXw/hqdefault.jpg",113,"youtube","sEUFADJtcXw",200,[],{"schema":824,"document":825},"dast",{"type":826,"children":827},"root",[828,881,894,898,900,910,914,918,922,926,930,934,935,938,945,969,972,1020,1023,1026],{"type":829,"children":830},"paragraph",[831,834,843,845,852,854,861,863,870,872,879],{"type":832,"value":833},"span","June 2021 Windows Updates brought a ",{"url":835,"meta":836,"type":12,"children":840},"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33742",[837],{"id":838,"value":839},"target","_blank",[841],{"type":832,"value":842},"fix for CVE-2021-33742",{"type":832,"value":844},", a remote code execution in the MSHTML component, exploitable via Microsoft browsers and potentially other applications using this component, e.g. via a malicious Microsoft Word document. Discovery of this issue was attributed to ",{"url":846,"meta":847,"type":12,"children":849},"https://twitter.com/_clem1",[848],{"id":838,"value":839},[850],{"type":832,"value":851},"Clément Lecigne",{"type":832,"value":853}," of Google’s Threat Analysis Group, while Google's security researcher ",{"url":855,"meta":856,"type":12,"children":858},"https://twitter.com/maddiestone",[857],{"id":838,"value":839},[859],{"type":832,"value":860},"Maddie Stone",{"type":832,"value":862}," wrote a ",{"url":864,"meta":865,"type":12,"children":867},"https://googleprojectzero.github.io/0days-in-the-wild/0day-RCAs/2021/CVE-2021-33742.html",[866],{"id":838,"value":839},[868],{"type":832,"value":869},"detailed analysis",{"type":832,"value":871},". A short proof-of-concept (see Maddie's article) that causes access violation in the browser was written by ",{"url":873,"meta":874,"type":12,"children":876},"https://twitter.com/ifsecure",[875],{"id":838,"value":839},[877],{"type":832,"value":878},"Ivan Fratric",{"type":832,"value":880}," of Google Project Zero.",{"type":829,"children":882},[883,885,892],{"type":832,"value":884},"Our tests showed that out of the Windows versions that we have ",{"url":886,"meta":887,"type":12,"children":889},"https://0patch.zendesk.com/hc/en-us/articles/4403751356050",[888],{"id":838,"value":839},[890],{"type":832,"value":891},"\"security adopted\"",{"type":832,"value":893},", we were only able to reproduce the vulnerability on Windows 10 v1803 and v1809, so these were the ones we wanted to create a micropatch for.\n",{"type":829,"children":895},[896],{"type":832,"value":897},"After reproducing the vulnerability, we looked at Microsoft's patch to see if we could do something similar for the two affected Windows 10 versions that haven't received the official vendor fix.",{"item":795,"type":899},"block",{"type":829,"children":901},[902,904,908],{"type":832,"value":903},"As seen on the above image, Microsoft has just added a check to see if the user-influenced value (size of ",{"type":832,"marks":905,"value":907},[906],"code","TextData",{"type":832,"value":909}," element) that caused memory corruption was greater than 0x1FFFFFFF. If so, it triggers an assertion and effectively crashes the process without trying to resolve the situation. This is a bit unusual as it implies that either (a) Microsoft found it extremely difficult to fix this issue at some root level, issue a JavaScript exception and keep the process running, or (b) they wanted to get this over with quickly because Internet Explorer is hardly supported anymore and MSHTML, while still being used by other applications such as Microsoft Word, is not a critical component for their most important customers.",{"type":829,"children":911},[912],{"type":832,"value":913},"Be it as it may, our micropatch does the same as looking for a better fix could take us down a rabbit hole for a long time. However, it also records an \"Exploit Blocked\" event to the local 0patch log so an attack will leave a trace.",{"type":829,"children":915},[916],{"type":832,"value":917},"Source code of our micropatch:\n",{"type":829,"children":919},[920],{"type":832,"value":921},"\n\nMODULE_PATH \"..\\Affected_Modules\\mshtml.dll_11.0.17134.2208_32bit_Win10v1803-u202105\\mshtml.dll\"\nPATCH_ID 667\nPATCH_FORMAT_VER 2\nVULN_ID 7139\nPLATFORM win32\npatchlet_start\n    PATCHLET_ID 1\n    PATCHLET_TYPE 2\n    PATCHLET_OFFSET 0x4498d0\n    N_ORIGINALBYTES 5\n    JUMPOVERBYTES 0\n    PIT mshtml!0x75e4f0\n    ;0x75e4f0 -> Release_Assert\n    \n    code_start\n        mov eax, ebx            ;Get the size of the string       \n        cmp eax, 2000000h       ;Check if the string is shorter than 0x2000000\n        jl NOEXPLOIT            ;If it's shorter, continue\n        call PIT_ExploitBlocked ;If not shorter, show the popup\n        setl cl                 ;flag that controls the behavior of Release_Assert function.\n                                ;If it's 0, the function does nothing.\n        call PIT_0x75e4f0       ;Call Release_Assert\n        NOEXPLOIT:\n    code_end\n    \npatchlet_end\n   \n",{"type":829,"children":923},[924],{"type":832,"value":925}," ",{"type":829,"children":927},[928],{"type":832,"value":929},"And the video of our patch in action. Note that in contrast to a typical micropatch that prevents the process from crashing, this micropatch - doing exactly the same as Microsoft's fix - lets the process crash in a controlled, unexploitable way in case an overly long string is encountered.\n",{"type":829,"children":931},[932],{"type":832,"value":933},"\n",{"item":811,"type":899},{"type":829,"children":936},[937],{"type":832,"value":933},{"type":829,"children":939},[940,942],{"type":832,"value":941},"This micropatch was written for:",{"type":832,"marks":943,"value":925},[944],"strong",{"type":946,"style":947,"children":948},"list","numbered",[949,961],{"type":950,"children":951},"listItem",[952],{"type":829,"children":953},[954,957,959],{"type":832,"marks":955,"value":956},[944],"Windows 10 v1809 ",{"type":832,"value":958},"(updated with May 2021 Updates - latest before end of support)",{"type":832,"marks":960,"value":925},[944],{"type":950,"children":962},[963],{"type":829,"children":964},[965,968],{"type":832,"marks":966,"value":967},[944],"Windows 10 v1803 ",{"type":832,"value":958},{"type":829,"children":970},[971],{"type":832,"value":925},{"type":829,"children":973},[974,976,982,984,989,991,996,998,1003,1005,1010,1012,1018],{"type":832,"value":975},"To obtain the micropatch and have it applied on your computer(s) along with other micropatches included with a PRO license, create an account in ",{"url":693,"meta":977,"type":12,"children":979},[978],{"id":838,"value":839},[980],{"type":832,"value":981},"0patch Central",{"type":832,"value":983},", install 0patch Agent and register it to your account. Note that no computer restart is needed for installing the agent or applying/un-applying any 0patch micropatch. For a 0patch trial, contact ",{"url":985,"type":12,"children":986},"mailto:sales@0patch.com",[987],{"type":832,"value":988},"sales@0patch.com",{"type":832,"value":990},". \nWe'd like to thank ",{"url":846,"meta":992,"type":12,"children":994},[993],{"id":838,"value":839},[995],{"type":832,"value":851},{"type":832,"value":997},", ",{"url":855,"meta":999,"type":12,"children":1001},[1000],{"id":838,"value":839},[1002],{"type":832,"value":860},{"type":832,"value":1004}," and ",{"url":873,"meta":1006,"type":12,"children":1008},[1007],{"id":838,"value":839},[1009],{"type":832,"value":878},{"type":832,"value":1011}," of Google for finding this issue and sharing details, which allowed us to create a micropatch and protect our users.\n\nTo learn more about 0patch, please visit our ",{"url":1013,"meta":1014,"type":12,"children":1016},"https://0patch.zendesk.com/hc/en-us",[1015],{"id":838,"value":839},[1017],{"type":832,"value":97},{"type":832,"value":1019},".\n",{"type":829,"children":1021},[1022],{"type":832,"value":933},{"type":829,"children":1024},[1025],{"type":832,"value":925},{"type":829,"children":1027},[1028],{"type":832,"value":925},{"alt":753,"url":1030,"width":1031,"height":1032,"responsiveImage":1033},"https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png",1600,800,{"srcSet":1034,"webpSrcSet":1035,"sizes":1036,"src":1037,"width":1038,"height":1039,"aspectRatio":228,"alt":753,"title":18,"bgColor":1040,"base64":1041},"https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&w=1440 360w,https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&dpr=0.5&fit=crop&w=1440 720w,https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&dpr=0.75&fit=crop&w=1440 1080w,https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&fit=crop&w=1440 1440w","https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&fm=webp&w=1440 360w,https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&dpr=0.5&fit=crop&fm=webp&w=1440 720w,https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&dpr=0.75&fit=crop&fm=webp&w=1440 1080w,https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&fit=crop&fm=webp&w=1440 1440w","(max-width: 1440px) 100vw, 1440px","https://www.datocms-assets.com/166020/1774002332-7139_vulncard.png?auto=compress&crop=focalpoint&fit=crop&w=1440",1440,720,"#6eb2bb","data:image/png;base64,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",1780067949225]