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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-2017-0022)","https://i.ytimg.com/vi/wWKertvRrnw/hqdefault.jpg",113,"youtube","wWKertvRrnw",200,[],{"schema":853,"document":854},"dast",{"type":855,"children":856},"root",[857,895,897,901,902,919,920,924,925,929],{"type":858,"children":859},"paragraph",[860,865,867,872,874,879,881,886,888,893],{"type":861,"marks":862,"value":864},"span",[863],"strong","How to Micropatch a Logical Flaw",{"type":861,"value":866},"\n\nby Luka Treiber, 0patch Team\n\nThis time I chose to take a look at Microsoft's XML Core Services Information Disclosure Vulnerability (",{"url":868,"type":12,"children":869},"http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0022",[870],{"type":861,"value":871},"CVE-2017-0022",{"type":861,"value":873},"), which allows a malicious web site loaded in Internet Explorer to determine whether specific executable modules or applications are present on user's system or not. It has also been exploited in the wild as some exploit kits (",{"url":875,"type":12,"children":876},"https://researchcenter.paloaltonetworks.com/2017/07/how-traps-protects-against-astrum/",[877],{"type":861,"value":878},"Astrum",{"type":861,"value":880},", ",{"url":882,"type":12,"children":883},"http://www.securityweek.com/windows-zero-day-exploited-adgholas-neutrino-ek",[884],{"type":861,"value":885},"Neutrino",{"type":861,"value":887},") were using it to fingerprint victim's machines. Although an official fix has already been released in March, what made it interesting was that it was a logical vulnerability while so far, our team mostly patched memory corruptions.\n\nBased on ",{"url":889,"type":12,"children":890},"http://blog.trendmicro.com/trendlabs-security-intelligence/cve-2017-0022-microsoft-patches-vulnerability-exploited-adgholas-neutrino/",[891],{"type":861,"value":892},"TrendLabs Security Intelligence Blog",{"type":861,"value":894}," I managed to reproduce the PoC. The PoC (image below) checks for the existence of files by calling  XMLParser::LoadDTD with a binary file resource URL as input parameter. If the resource such as version info is found the vulnerable XMLParser::LoadDTD tries to parse it as a DTD but fails and returns 0x80070485 because version info is not a DTD. If the binary file or the resource within does not exist 0x80004005 is returned.",{"item":796,"type":896},"block",{"type":858,"children":898},[899],{"type":861,"value":900},"\nThere were enough pointers in the report to easily spot the vulnerable function XMLParser::LoadDTD and make a diff between the vulnerable (left) and the patched version (right)",{"item":812,"type":896},{"type":858,"children":903},[904,906,911,913,917],{"type":861,"value":905},"\nTrendLabs' report reads as if removing the ",{"url":907,"type":12,"children":908},"http://blog.trendmicro.com/trendlabs-security-intelligence/files/2017/03/cve-2017-0022-code-7.jpg",[909],{"type":861,"value":910},"check ",{"type":861,"value":912},"if (v3>=0) alone fixed CVE-2017-0022 so I located this check in assembly above\n\n\n",{"type":861,"marks":914,"value":916},[915],"code","test    edi, edi\njl      short loc_728C183C",{"type":861,"value":918},"\n\n\nand created a micropatch that simply jumps over it. However, that did not change the outcome of the PoC. With my micropatch applied, the PoC still returned errorCode 0x80070485 for non-existing files. I then debugged Internet Explorer on a patched machine and found that function IsDownloadExternal following the skipped if also behaves differently. Diffing code graphs for this function showed that quite some changes had been introduced to its implementation:",{"item":826,"type":896},{"type":858,"children":921},[922],{"type":861,"value":923},"\n\nThe gray conditional blocks have been added as part of the official patch. After adding this logic to my micropatch for the vulnerable msxml3.dll, the vulnerability was finally neutralized.\n\nThe micropatch has been published and distributed to all installed 0patch Agents. If you want to see it in action, check the video below.",{"item":840,"type":896},{"type":858,"children":926},[927],{"type":861,"value":928},"Black box analysis of a logical vulnerability like this one can turn out to be quite challenging because unlike memory corruptions, no exceptions are thrown that could be caught during debugging and help pinpoint the culprit. 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