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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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more",[688,691],{"id":689,"primary":685,"externalLink":95,"parent":18,"reference":18,"title":690,"description":40,"publishTranslation":42},"B1pEweRaRD2YBkP6aH1CfA","Help center",{"id":692,"primary":42,"externalLink":693,"parent":18,"reference":18,"title":694,"description":40,"publishTranslation":42},"Mk0Yz-yqTk2akShgf7ARNg","https://central.0patch.com/","Sign in",[696,700],{"id":697,"title":698,"url":699},"NDrk5d4kQ96J2aCuTr-gvg","0patch on X","https://twitter.com/0patch",{"id":701,"title":702,"url":703},"GqN4lYxyTMyzcmRllVY4mg","Linked In","https://linkedin.com/company/0patch",{"left":705,"top":705,"width":706,"height":706,"rotate":705,"vFlip":685,"hFlip":685,"body":707},0,24,"\u003Cg fill=\"none\">\u003Cpath d=\"M11.9999 15.0539L6.34619 9.40013L7.39994 8.34637L11.9999 12.9464L16.5999 8.34637L17.6537 9.40013L11.9999 15.0539Z\" fill=\"currentColor\"/>\u003C/g>",{"left":705,"top":705,"width":706,"height":706,"rotate":705,"vFlip":685,"hFlip":685,"body":709},"\u003Cg 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S","2025-08-21T14:15:14+02:00","ZfqYuM-ORiGFp3wEATw1lA",{"blocks":793,"links":806,"value":807},[794],{"id":795,"_modelApiKey":796,"__typename":797,"video":798},"OaQyk_P3RZiBTjVAWvtJWA","video_external","VideoExternalRecord",{"url":799,"title":800,"thumbnailUrl":801,"height":802,"provider":803,"providerUid":804,"width":805},"https://www.youtube.com/watch?v=X9NZR27pi4I","0patching CVE-2020-1281","https://i.ytimg.com/vi/X9NZR27pi4I/hqdefault.jpg",113,"youtube","X9NZR27pi4I",200,[],{"schema":808,"document":809},"dast",{"type":810,"children":811},"root",[812,847,849,869],{"type":813,"children":814},"paragraph",[815,818,827,829,836,838,845],{"type":816,"value":817},"span","Windows 7 and Server 2008 R2 users without Extended Security Updates have just received a micropatch for ",{"url":819,"meta":820,"type":12,"children":824},"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1281",[821],{"id":822,"value":823},"target","_blank",[825],{"type":816,"value":826},"CVE-2020-1281",{"type":816,"value":828},", an integer overflow vulnerability in Windows OLE marshaling that could allow a remote attacker to execute arbitrary code on user's computer.\nThis vulnerability was patched by Microsoft with June 2020 Updates, but Windows 7 and Server 2008 R2 users without Extended Security Updates remained vulnerable.\nSecurity researcher ",{"url":830,"meta":831,"type":12,"children":833},"https://twitter.com/guhe120/",[832],{"id":822,"value":823},[834],{"type":816,"value":835},"Yuki Chen",{"type":816,"value":837}," found the vulnerability, wrote an ",{"url":839,"meta":840,"type":12,"children":842},"https://github.com/guhe120/Windows-EoP/blob/master/CVE-2020-1281/CVE-2020-1281.pdf",[841],{"id":822,"value":823},[843],{"type":816,"value":844},"in-depth analysis",{"type":816,"value":846},", analyzed Microsoft's patch and provided a POC for triggering the vulnerability.\nThe vulnerability is in the way new object size is being calculated when an object is enlarged (e.g., in string concatenation). This new size is then used for allocating memory for the resulting \"enlarged\" object.\nThe vulnerable code doesn't account for really large numbers where adding would exceed the capacity of 32-bit numbers. In such cases, an integer overflow occurs, a too-small memory block is allocated, and subsequent copying to this new block overwrites memory outside of it.\nMicrosoft's patch modified several functions related to calculating the object size. We decided to only patch the one that is proven to be exploitable at this point (BSTR_UserSize). Upon detecting an overflow, our patch reports \"Exploit Blocked\" and terminates the process:\n\n\nMODULE_PATH \"..\\Affected_Modules\\oleaut32.dll_6.1.7601.24537_64bit\\oleaut32.dll\"\nPATCH_ID 441\nPATCH_FORMAT_VER 2\nVULN_ID 6279\nPLATFORM win64\n\npatchlet_start\n    PATCHLET_ID 1\n    PATCHLET_TYPE 2\n    PATCHLET_OFFSET 0x5fcf\n    N_ORIGINALBYTES 5\n    JUMPOVERBYTES 0\n    PIT oleaut32.dll!0x10edc,Kernel32.dll!TerminateProcess,Kernel32.dll!GetCurrentProcess\n    \n    ; This patchlet is located in BSTR_UserSize and replaces the main branch of code right up to the retn\n    ; On entry we have:\n    ; - rax points to the content of the BSTR object (the first character of the string)\n    ; - rdx is the size to be added to the string\n    ; - ecx is rdx+3 (just computed using \"lea ecx, [rdx+3])\n    ; The patch performs the same operations the original code does, but for each of them,\n    ; it checks for a numeric overflow and if so, pops ExploitBlocked and triggers an exception like the official patch\n        \n    code_start\n    \n        and ecx, 0xFFFFFFFC ; we pushed this instruction out, so replacing it here\n        cmp ecx, edx        ; check if adding 3 and aligning resulted in an overflow\n        jb OVERFLOW         ; overflow detected\n        \n        test eax, eax       ; same as in original code\n        jz BSTR_IS_NULL\n        mov eax, dword [rax-4] ; same as in original code\n        jmp END1\n    BSTR_IS_NULL:\n        xor eax, eax ; same as in original code\n    END1:\n    \n        add eax, 1 ; original code has \"inc eax\", but that doesn't set the carry flag\n        jc OVERFLOW ; overflow would set the carry flag\n        and eax, 0xFFFFFFFE\n        \n        add eax, ecx\n        jc OVERFLOW ; overflow would set the carry flag\n        \n        add eax, 0x0C\n        jc OVERFLOW ; overflow would set the carry flag\n        \n        retn ; return from the function\n        \n    OVERFLOW:\n        call PIT_ExploitBlocked\n        call PIT_GetCurrentProcess\n        mov rcx, rax\n        mov rdx, 0x1337\n        call PIT_TerminateProcess\n    \n    code_end\n    \npatchlet_end\n\n\nHere's a video of our micropatch in action:\n\n\n\n",{"item":795,"type":848},"block",{"type":813,"children":850},[851,853,859,861,867],{"type":816,"value":852},"We'd like to thank Yuki Chen for an excellent analysis and POC for this issue, which allowed us to create a micropatch for Windows users without security updates.\nThis micropatch is immediately available to all 0patch users with a PRO license, and is targeted at Windows 7 and Windows Server 2008 R2 users without Extended Security Updates. To obtain the micropatch and have it applied on your computer(s) along with other micropatches included with a PRO license, create an account at ",{"url":693,"meta":854,"type":12,"children":856},[855],{"id":822,"value":823},[857],{"type":816,"value":858},"0patch Central",{"type":816,"value":860},", 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.\n\nTo learn more about 0patch, please visit our ",{"url":862,"meta":863,"type":12,"children":865},"https://0patch.zendesk.com/hc/en-us",[864],{"id":822,"value":823},[866],{"type":816,"value":97},{"type":816,"value":868},".",{"type":813,"children":870},[871],{"type":816,"value":40},{"alt":720,"url":873,"width":874,"height":875,"responsiveImage":876},"https://www.datocms-assets.com/166020/1755778507-vuln_6279_cve-2020-1281_patchcard_li_fb_1024x536.png",636,333,{"srcSet":877,"webpSrcSet":878,"sizes":879,"src":880,"width":881,"height":882,"aspectRatio":883,"alt":720,"title":720,"bgColor":884,"base64":885},"https://www.datocms-assets.com/166020/1755778507-vuln_6279_cve-2020-1281_patchcard_li_fb_1024x536.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&w=1440 360w,https://www.datocms-assets.com/166020/1755778507-vuln_6279_cve-2020-1281_patchcard_li_fb_1024x536.png?auto=compress&crop=focalpoint&fit=crop&w=1440 1440w","https://www.datocms-assets.com/166020/1755778507-vuln_6279_cve-2020-1281_patchcard_li_fb_1024x536.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&fm=webp&w=1440 360w,https://www.datocms-assets.com/166020/1755778507-vuln_6279_cve-2020-1281_patchcard_li_fb_1024x536.png?auto=compress&crop=focalpoint&fit=crop&fm=webp&w=1440 1440w","(max-width: 1440px) 100vw, 1440px","https://www.datocms-assets.com/166020/1755778507-vuln_6279_cve-2020-1281_patchcard_li_fb_1024x536.png?auto=compress&crop=focalpoint&fit=crop&w=1440",1440,754,1.909814323607427,"#30bd53","data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoHBwgHBhYPDRQLDQ4NDg8JDgkGDhENDg0YFx8ZGhYVFiEaHysjGh0oHRUWJDUlKC0vMjIyGSI4PTcwPCsxMi8BCgsLDg0OHBANHC8cFh07Ly8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vL//AABEIAA0AGAMBIgACEQEDEQH/xAAXAAEBAQEAAAAAAAAAAAAAAAAFAAYE/8QAGxAAAgMBAQEAAAAAAAAAAAAAAAECAwUREwT/xAAVAQEBAAAAAAAAAAAAAAAAAAAEA//EABoRAAICAwAAAAAAAAAAAAAAAAABAxICITH/2gAMAwEAAhEDEQA/ANPn0pCvjFxBfgsl0VVkuF5FsdOnY4NGmMURaTbiRXHgnBOp/9k=",1780067959328]