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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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1822px",2.2246642246642248,"#1975e7","data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoHBwgHBgoICAgLCgoVDhgQDg0WDhUdFREdHRYdGCUlFiUaHyslHR0oHSUWJDUlKC0vMjIyGSI4PTcwPCsxMi8BCgsLDg0PFRAQHDsoIigvLy87Oy87Ly8vOy8vLy87Ly87Ly87Ly8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vL//AABEIAAsAGAMBIgACEQEDEQH/xAAYAAACAwAAAAAAAAAAAAAAAAACBAAFB//EACEQAAIBAwMFAAAAAAAAAAAAAAECAAMEETFBURITFCEi/8QAFQEBAQAAAAAAAAAAAAAAAAAAAQP/xAAYEQACAwAAAAAAAAAAAAAAAAAAEgETIf/aAAwDAQACEQMRAD8A16olOmRk4hV1VrduMSsv3buD6MbLHwNdpNwWArAKEIBkilgx6j7khYOQf//Z",{"id":811,"_modelApiKey":812,"__typename":813,"video":814},"JmlM5VYORhqgM76dKGi8LA","video_external","VideoExternalRecord",{"url":815,"title":816,"thumbnailUrl":817,"height":818,"provider":819,"providerUid":820,"width":821},"https://www.youtube.com/watch?v=IXt-5nm4Vl8","0patching CVE-2020-1350","https://i.ytimg.com/vi/IXt-5nm4Vl8/hqdefault.jpg",113,"youtube","IXt-5nm4Vl8",200,[],{"schema":824,"document":825},"dast",{"type":826,"children":827},"root",[828,884,886,890,891,895,898,942],{"type":829,"children":830},"paragraph",[831,834,843,845,852,854,861,863,870,872,882],{"type":832,"value":833},"span","This month's Patch Tuesday included a fix for CVE-2020-1350, a critical memory corruption vulnerability in Windows DNS Server affecting all Windows Server versions from long-unsupported Server 2003 to the latest Server 2019.\n\nAfter ",{"url":835,"meta":836,"type":12,"children":840},"https://msrc-blog.microsoft.com/2020/07/14/july-2020-security-update-cve-2020-1350-vulnerability-in-windows-domain-name-system-dns-server/",[837],{"id":838,"value":839},"target","_blank",[841],{"type":832,"value":842},"Microsoft's initial announcement",{"type":832,"value":844}," and ",{"url":846,"meta":847,"type":12,"children":849},"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350",[848],{"id":838,"value":839},[850],{"type":832,"value":851},"security advisory",{"type":832,"value":853},", the CheckPoint research team published a ",{"url":855,"meta":856,"type":12,"children":858},"https://research.checkpoint.com/2020/resolving-your-way-into-domain-admin-exploiting-a-17-year-old-bug-in-windows-dns-servers/",[857],{"id":838,"value":839},[859],{"type":832,"value":860},"detailed article",{"type":832,"value":862}," about the issue, describing the attack vector and providing enough information for other security researchers to trigger the vulnerability. Just one day later, the first real ",{"url":864,"meta":865,"type":12,"children":867},"https://github.com/maxpl0it/CVE-2020-1350-DoS",[866],{"id":838,"value":839},[868],{"type":832,"value":869},"proof-of-concept",{"type":832,"value":871}," was published, developed by Max Van Amerongen (",{"url":873,"meta":874,"type":12,"children":879},"https://twitter.com/maxpl0it/",[875,878],{"id":876,"value":877},"rel","user",{"id":838,"value":839},[880],{"type":832,"value":881},"@maxpl0it",{"type":832,"value":883},") from F-Secure Labs, and later several other researchers have shown their own tools triggering the vulnerability.\nWe can safely assume that offensive teams worldwide are currently trying to develop a reliable arbitrary code execution exploit as they know that Windows Updates take anywhere from long to eternity before getting applied to most Windows Servers out there. Their job will not be trivial, with various exploit mitigations in place on modern Windows servers, but counting on them to fail would be a risky strategy. In addition, many companies are still using Windows Server 2008 machines with no security updates past January this year.\n\nNumerous 0patch customers have one or more Windows 2008 Servers and we wanted to take care of them as quickly as possible. With a working proof-of-concept at hand we could easily create a micropatch for this issue. Let's look at Microsoft's patch first:\n \n",{"item":795,"type":885},"block",{"type":829,"children":887},[888],{"type":832,"value":889},"\nThe image above shows the difference between vulnerable function SigWireRead (left) and its patched counterpart (right). This function was one of only three functions in dns.exe modified by the July update, and the other two were not relevant for the issue at hand.\nMicrosoft's patch (gray code blocks) introduced three integer overflow/underflow checks, for one subtraction and two addition operations. When faced with Max's proof-of-concept, it is the third check (the lowest gray code block) that detects the overflow and redirects execution towards function's exit instead of processing the DNS packet further - which would lead to memory corruption. \n\nOur micropatch does logically the same, with one difference - when integer overflow/underflow is detected, it also displays and logs an exploit attempt, allowing admins to know that their server was targeted by an exploit:\n\n\nMODULE_PATH \"..\\Affected_Modules\\dns.exe_6.1.7601.24437_64bit\\dns.exe\"\nPATCH_ID 456\nPATCH_FORMAT_VER 2\nVULN_ID 6390\nPLATFORM win64\n\npatchlet_start\n    PATCHLET_ID 1\n    PATCHLET_TYPE 2\n    PATCHLET_OFFSET 0x4EC89\n    N_ORIGINALBYTES 5\n    JUMPOVERBYTES 0\n    PIT dns.exe!0x4EC68\n   \n    code_start\n        push rdi ; push to ensure normal code flow after patch\n        push rax ; push to ensure normal code flow after patch\n       \n        ;First check\n        sub rdi, rax\n        cmp rdi, 0xFFFF\n        ja ExploitBlocked ; the TCP packet is not valid, jump to Exploit Blocked\n       \n        ;Second check\n        movzx eax, byte[rsp+30h+2*8] ; added 2*8 to the original offset to compensate for the 2 pushes at the beginning\n        add ax, 0x14\n        cmp ax, 0x12\n        jb ExploitBlocked ; the TCP packet is not valid, jump to Exploit Blocked\n       \n        ;Third check\n        lea ecx, [rax+rdi]\n        cmp cx, ax\n        jb ExploitBlocked ; the TCP packet is not valid, jump to Exploit Blocked\n        jmp End ; the TCP packet is valid, continue with original code\n    ExploitBlocked:\n        pop rax ; restore rax to its previous value\n        pop rdi ; restore rdi to its previous value\n        call PIT_ExploitBlocked ; Exploit Blocked pop up\n        jmp PIT_0x4EC68 ; Exit function, TCP packet not valid\n    End:\n        pop rax ; restore rax to its previous value\n        pop rdi ; restore rdi to its previous value\n    code_end\n   \npatchlet_end\n\n\n\n\nWe released our micropatch early afternoon CET today and it got applied to all online computers with 0patch PRO worldwide within 60 minutes ",{"item":811,"type":885},{"type":829,"children":892},[893],{"type":832,"value":894},"The first instance of our micropatch is targeted at Windows Server 2008 R2 without Extended Security Updates, and we plan to port it to Windows Server 2003 next for our users who are for various reasons still using this unsupported server. ",{"type":829,"children":896},[897],{"type":832,"value":40},{"type":829,"children":899},[900,904,906,911,913,919,921,924,926,932,934,940],{"type":832,"marks":901,"value":903},[902],"emphasis","[Update 7/20/2020: Micropatch is now ported to 32-bit and 64-bit Windows Server 2003.]",{"type":832,"value":905},"\nAlthough free official updates exist for all supported Windows servers, admins may not be able to apply them immediately or restart the computer; for such cases, requests for porting our micropatch to specific versions of dns.exe running on affected computers can be sent to ",{"url":907,"type":12,"children":908},"mailto:sales@0patch.com",[909],{"type":832,"value":910},"sales@0patch.com",{"type":832,"value":912},".\n\nIf you have 0patch Agent with PRO license installed on your Windows Server 2008 R2 or Server 2003 computer, our micropatch is already downloaded and applied to your DNS server. Otherwise, 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":914,"type":12,"children":916},[915],{"id":838,"value":839},[917],{"type":832,"value":918},"0patch Central",{"type":832,"value":920},", purchase a PRO license or request a trial at ",{"url":907,"type":12,"children":922},[923],{"type":832,"value":910},{"type":832,"value":925},", install 0patch Agent and register it to your account.\n\nNote 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":927,"meta":928,"type":12,"children":930},"https://0patch.zendesk.com/hc/en-us",[929],{"id":838,"value":839},[931],{"type":832,"value":97},{"type":832,"value":933},".\n\n\nWe'd like to thank Max Van Amerongen (",{"url":873,"meta":935,"type":12,"children":938},[936,937],{"id":876,"value":877},{"id":838,"value":839},[939],{"type":832,"value":881},{"type":832,"value":941},") from F-Secure Labs for publishing their analysis and POC, and for providing additional assistance in triggering the vulnerability and simplifying our test case, thereby allowing us to create this micropatch for Windows users without official security updates.\n",{"type":829,"children":943},[944],{"type":832,"value":40},{"alt":720,"url":946,"width":947,"height":948,"responsiveImage":949},"https://www.datocms-assets.com/166020/1755778274-vuln_6390_cve-2020-1350_sigred_patchcard_twitter_1024x512.png",625,312,{"srcSet":950,"webpSrcSet":951,"sizes":952,"src":953,"width":954,"height":955,"aspectRatio":956,"alt":720,"title":720,"bgColor":957,"base64":958},"https://www.datocms-assets.com/166020/1755778274-vuln_6390_cve-2020-1350_sigred_patchcard_twitter_1024x512.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&w=1440 360w,https://www.datocms-assets.com/166020/1755778274-vuln_6390_cve-2020-1350_sigred_patchcard_twitter_1024x512.png?auto=compress&crop=focalpoint&fit=crop&w=1440 1440w","https://www.datocms-assets.com/166020/1755778274-vuln_6390_cve-2020-1350_sigred_patchcard_twitter_1024x512.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&fm=webp&w=1440 360w,https://www.datocms-assets.com/166020/1755778274-vuln_6390_cve-2020-1350_sigred_patchcard_twitter_1024x512.png?auto=compress&crop=focalpoint&fit=crop&fm=webp&w=1440 1440w","(max-width: 1440px) 100vw, 1440px","https://www.datocms-assets.com/166020/1755778274-vuln_6390_cve-2020-1350_sigred_patchcard_twitter_1024x512.png?auto=compress&crop=focalpoint&fit=crop&w=1440",1440,719,2.0027816411682893,"#c05bb0","data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoHBwgHBgoPCAgUEQoQDQ8ODQkNGhENDRENFxUZGBYVFhUaHysjGh0oHRUWJDUlKC0vMjIyGSI4PTcwPCsxMi8BCgsLBQUFEAUFEC8cFhwvLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vL//AABEIAAwAGAMBIgACEQEDEQH/xAAYAAACAwAAAAAAAAAAAAAAAAACBAAFBv/EABwQAAEEAwEAAAAAAAAAAAAAAAEAAgMEEiExBf/EABUBAQEAAAAAAAAAAAAAAAAAAAUA/8QAFBEBAAAAAAAAAAAAAAAAAAAAAP/aAAwDAQACEQMRAD8A0/nVYgzZT5qQY9VPSkdj1PBziBtFggX60AjUR2mB0O1FJ//Z",1780067960195]