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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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1055px",1.043521266073195,"#0066b6","data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoHBwgHBgoICAgFCgoFBQwFBQUFBREJCgUMFxMZGBYTFhUaHysjGh0oHRUWJDUlKC0vMjIyGSI4PTcwPCsxMi8BCgsLBQUFEAUFEC8cFhwvLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vL//AABEIABcAGAMBIgACEQEDEQH/xAAVAAEBAAAAAAAAAAAAAAAAAAAAB//EABQQAQAAAAAAAAAAAAAAAAAAAAD/xAAVAQEBAAAAAAAAAAAAAAAAAAAAAv/EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAMAwEAAhEDEQA/AK8ApIAAAAAD/9k=",{"id":811,"_modelApiKey":812,"__typename":813,"video":814},"P2SpsIyhTvWtOcP-rE4QwQ","video_external","VideoExternalRecord",{"url":815,"title":816,"thumbnailUrl":817,"height":818,"provider":819,"providerUid":820,"width":821},"https://www.youtube.com/watch?v=WKS5F9IrXlA","0patching a 0day LPE in Windows 7 and Windows Server 2008 R2","https://i.ytimg.com/vi/WKS5F9IrXlA/hqdefault.jpg",113,"youtube","WKS5F9IrXlA",200,[],{"schema":824,"document":825},"dast",{"type":826,"children":827},"root",[828,855,877,890,894,899,912,932,936,940,944,948,952,965,969,973,976,978,981,985,988,989,992,996,1020,1076,1079,1082],{"type":829,"children":830},"paragraph",[831,836,838,841,851,854],{"type":832,"marks":833,"value":835},"span",[834],"emphasis","[Update 1/22/2021: This vulnerability did not get patched by December 2020 or January 2021 Extended Security Updates, so we ported our micropatch to these updates.]",{"type":832,"value":837},"\n ",{"type":832,"marks":839,"value":840},[834],"\"Lol, who's even using Windows 7 anymore?\"\"According to ",{"url":842,"meta":843,"type":12,"children":847},"https://www.netmarketshare.com/operating-system-market-share.aspx?options=%7B%22filter%22%3A%7B%22%24and%22%3A%5B%7B%22platform%22%3A%7B%22%24in%22%3A%5B%22Windows%22%5D%7D%7D%5D%7D%2C%22dateLabel%22%3A%22Custom%22%2C%22attributes%22%3A%22share%22%2C%22group%22%3A%22platformVersion%22%2C%22sort%22%3A%7B%22share%22%3A-1%7D%2C%22id%22%3A%22platformsDesktopVersions%22%2C%22dateInterval%22%3A%22Monthly%22%2C%22dateStart%22%3A%222020-10%22%2C%22dateEnd%22%3A%222020-10%22%2C%22segments%22%3A%22-1000%22%7D",[844],{"id":845,"value":846},"target","_blank",[848],{"type":832,"marks":849,"value":850},[834],"NetMarketShare",{"type":832,"marks":852,"value":853},[834],", almost one in four Windows users.\"",{"type":832,"value":837},{"type":829,"children":856},[857,859,866,868,875],{"type":832,"value":858},"On November 12, 2020, security researcher ",{"url":860,"meta":861,"type":12,"children":863},"https://twitter.com/itm4n",[862],{"id":845,"value":846},[864],{"type":832,"value":865},"Clément Labro",{"type":832,"value":867}," published a ",{"url":869,"meta":870,"type":12,"children":872},"https://itm4n.github.io/windows-registry-rpceptmapper-eop/",[871],{"id":845,"value":846},[873],{"type":832,"value":874},"detailed analysis",{"type":832,"value":876}," of a local privilege escalation vulnerability affecting Windows 7 and Windows Server 2008 R2 for which no official fix exists yet (at the time of this writing). Although these Windows platforms have reached end of support in January this year but Extended Security Updates (ESU) are still available for them until January 2023 - so even fully ESU-updated machines are currently affected by this issue.",{"type":829,"children":878},[879,881,888],{"type":832,"value":880},"As an alternative to ESU, we at 0patch have ",{"url":882,"meta":883,"type":12,"children":885},"https://blog.0patch.com/2019/09/keeping-windows-7-and-windows-server.html",[884],{"id":845,"value":846},[886],{"type":832,"value":887},"\"security adopted\"",{"type":832,"value":889}," Windows 7 and Windows Server 2008 R2 and are providing critical security patches for these platforms. Consequently, vulnerabilities like this one get our attention - and, usually, micropatches.",{"type":829,"children":891},[892],{"type":832,"value":893},"\n",{"type":895,"level":522,"children":896},"heading",[897],{"type":832,"value":898},"The Vulnerability",{"type":829,"children":900},[901,903,910],{"type":832,"value":902},"Clément wrote a very useful ",{"url":904,"meta":905,"type":12,"children":907},"https://github.com/itm4n/PrivescCheck",[906],{"id":845,"value":846},[908],{"type":832,"value":909},"permissions-checking tool",{"type":832,"value":911}," for Windows that find various misconfigurations in Windows that could allow a local attacker to elevate their privileges. On a typical Windows 7 and Server 2008 R2 machine, the tool found that all local users have write permissions on two registry keys:",{"type":913,"style":914,"children":915},"list","bulleted",[916,925],{"type":917,"children":918},"listItem",[919],{"type":829,"children":920},[921],{"type":832,"marks":922,"value":924},[923],"code","HKLM\\SYSTEM\\CurrentControlSet\\Services\\Dnscache",{"type":917,"children":926},[927],{"type":829,"children":928},[929],{"type":832,"marks":930,"value":931},[923],"HKLM\\SYSTEM\\CurrentControlSet\\Services\\RpcEptMapper",{"type":829,"children":933},[934],{"type":832,"value":935},"These didn't immediately seem exploitable, but Clément did the legwork and found the Windows Performance Monitoring mechanism can be made to read from these keys - and eventually load the DLL provided by the local attacker. To most everyone's surprise, not as the local user, but as Local System.",{"type":829,"children":937},[938],{"type":832,"value":939},"In short, a local non-admin user on the computer just creates a Performance subkey in one of the above keys, populates it with some values, and triggers performance monitoring, which leads to a Local System WmiPrvSE.exe process loading attacker's DLL and executing code from it.",{"type":829,"children":941},[942],{"type":832,"value":943}," ",{"type":895,"level":522,"children":945},[946],{"type":832,"value":947},"The Micropatch ",{"type":829,"children":949},[950],{"type":832,"value":951},"Now this is clearly a case of incorrect permissions on the above registry keys, and the solution should be obvious - correcting these permissions. However, we don't want our micropatches to make any global changes to the system, so we decided to address this in the code.",{"type":829,"children":953},[954,956,963],{"type":832,"value":955},"We analyzed where the Performance registry key is being read in Windows libraries and found that to be in advapi32.dll, function OpenExtensibleObjects, as a result of a call to RegKeyOpen* function with one of the performance-related ",{"url":957,"meta":958,"type":12,"children":960},"https://docs.microsoft.com/en-us/windows/win32/sysinfo/predefined-keys",[959],{"id":845,"value":846},[961],{"type":832,"value":962},"predefined keys",{"type":832,"value":964},", in our case HKEY_PERFORMANCE_DATA.",{"type":829,"children":966},[967],{"type":832,"value":968},"Function OpenExtensibleObjects iterates through all services in the registry looking for Performance keys, and we decided to patch it so that it would ignore this key in both affected services - making it look as if the Performance key wasn't there even if it was.",{"type":829,"children":970},[971],{"type":832,"value":972},"This obviously breaks performance monitoring for the affected services but that's a trade-off we believe is beneficial to our users. In case performance monitoring is needed for these services, the micropatch can always be temporarily disabled (again, no restart of the service, much less of the computer, is needed for that).\n",{"type":829,"children":974},[975],{"type":832,"value":893},{"item":795,"type":977},"block",{"type":829,"children":979},[980],{"type":832,"value":40},{"type":829,"children":982},[983],{"type":832,"value":984},"The video below shows how the attack works on a Windows 7 computer exploiting bad permissions on the Dnscache registry key. An identical attack could be mounted using the RpcEptMapper key.",{"type":829,"children":986},[987],{"type":832,"value":943},{"item":811,"type":977},{"type":829,"children":990},[991],{"type":832,"value":893},{"type":829,"children":993},[994],{"type":832,"value":995},"This micropatch is immediately available to all 0patch users, including those with a FREE plan. It is targeted at: ",{"type":913,"style":997,"children":998},"numbered",[999,1005,1011],{"type":917,"children":1000},[1001],{"type":829,"children":1002},[1003],{"type":832,"value":1004},"Windows 7 and Server 2008 R2 computers without ESU, updated to January 2020, and ",{"type":917,"children":1006},[1007],{"type":829,"children":1008},[1009],{"type":832,"value":1010},"Windows 7 and Server 2008 R2 computers with ESU, updated to November 2020, ",{"type":917,"children":1012},[1013],{"type":829,"children":1014},[1015,1018],{"type":832,"marks":1016,"value":1017},[834],"[Updated 1/22/2021] ",{"type":832,"value":1019},"Windows 7 and Server 2008 R2 computers with ESU, updated to December 2020 or January 2021\n",{"type":829,"children":1021},[1022,1024,1031,1033,1037,1039,1045,1047,1053,1055,1060,1062,1065,1067,1074],{"type":832,"value":1023}," According to our ",{"url":1025,"meta":1026,"type":12,"children":1028},"https://0patch.zendesk.com/hc/en-us/articles/360020855914",[1027],{"id":845,"value":846},[1029],{"type":832,"value":1030},"guidelines",{"type":832,"value":1032},", this micropatch is ",{"type":832,"marks":1034,"value":1036},[1035],"strong","free for everyone",{"type":832,"value":1038}," until Microsoft issues an official fix for it (presumably only as part of Extended Security Updates). By the time you're reading this the micropatch has already been distributed to all online 0patch Agents and also automatically applied except where Enterprise policies prevented that. If you're not a 0patch user and would like to use this micropatch on your computer(s), create an account in ",{"url":693,"meta":1040,"type":12,"children":1042},[1041],{"id":845,"value":846},[1043],{"type":832,"value":1044},"0patch Central",{"type":832,"value":1046},", 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":1048,"meta":1049,"type":12,"children":1051},"https://0patch.zendesk.com/hc/en-us",[1050],{"id":845,"value":846},[1052],{"type":832,"value":97},{"type":832,"value":1054},".  We'd like to thank  ",{"url":860,"meta":1056,"type":12,"children":1058},[1057],{"id":845,"value":846},[1059],{"type":832,"value":865},{"type":832,"value":1061}," for sharing their analysis and POC, which allowed us to create this micropatch for Windows users. We also encourage security researchers to privately share their analyses with us for micropatching, and further increase the positive impact of their work. Most of the analysis was done by our young micropatching expert Ziga Sumenjak. And finally, just one \"frequently\" asked question: ",{"type":832,"marks":1063,"value":1064},[834],"Q: \"Can't I simply manually tighten permissions on affected registry keys to remove the risk instead of using 0patch?\" ",{"type":832,"value":1066},"A: \"Yes you can (or you can use ",{"url":1068,"meta":1069,"type":12,"children":1071},"https://github.com/GossiTheDog/fixes/tree/main/RpcEptMapper",[1070],{"id":845,"value":846},[1072],{"type":832,"value":1073},"this batch script",{"type":832,"value":1075}," to create Performance keys with tightened permissions). We don't know, however, if that might break some functionality under some conditions. It's quite likely that Microsoft didn't set such permissions by accident.\"\n",{"type":829,"children":1077},[1078],{"type":832,"value":943},{"type":829,"children":1080},[1081],{"type":832,"value":893},{"type":829,"children":1083},[1084],{"type":832,"value":893},{"alt":720,"url":1086,"width":1087,"height":1088,"responsiveImage":1089},"https://www.datocms-assets.com/166020/1755778671-vuln_6867_no-cve-patchcard_twitter_506x253.png",640,320,{"srcSet":1090,"webpSrcSet":1091,"sizes":1092,"src":1093,"width":1094,"height":1095,"aspectRatio":228,"alt":720,"title":720,"bgColor":1096,"base64":1097},"https://www.datocms-assets.com/166020/1755778671-vuln_6867_no-cve-patchcard_twitter_506x253.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&w=1440 360w,https://www.datocms-assets.com/166020/1755778671-vuln_6867_no-cve-patchcard_twitter_506x253.png?auto=compress&crop=focalpoint&fit=crop&w=1440 1440w","https://www.datocms-assets.com/166020/1755778671-vuln_6867_no-cve-patchcard_twitter_506x253.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&fm=webp&w=1440 360w,https://www.datocms-assets.com/166020/1755778671-vuln_6867_no-cve-patchcard_twitter_506x253.png?auto=compress&crop=focalpoint&fit=crop&fm=webp&w=1440 1440w","(max-width: 1440px) 100vw, 1440px","https://www.datocms-assets.com/166020/1755778671-vuln_6867_no-cve-patchcard_twitter_506x253.png?auto=compress&crop=focalpoint&fit=crop&w=1440",1440,720,"#57bd6b","data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoHBwgHBhQIDQgLDQ0SEBENDg4NDhENDQ0NFx8ZGBYfFhUaHysjGh0oHRUWJDUlKC0vMjIyGSI4PTcwPCsxMi8BCgsLDg0OHAoQHC8cFhw7Oy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vL//AABEIAAwAGAMBIgACEQEDEQH/xAAXAAEBAQEAAAAAAAAAAAAAAAAFAQYE/8QAHRAAAgEEAwAAAAAAAAAAAAAAAAIBAwURMQQTIv/EABYBAQEBAAAAAAAAAAAAAAAAAAQFA//EABoRAAICAwAAAAAAAAAAAAAAAAABAxICITH/2gAMAwEAAhEDEQA/ANJb6KwLdKSoJwHbOxWGnGxci2UZ07HBcaKrBSXKfBTXHgjBOp//2Q==",1780067958331]