{"id":2864,"date":"2018-06-12T21:36:17","date_gmt":"2018-06-12T21:36:17","guid":{"rendered":"https:\/\/kasperskycontenthub.com\/threatpost\/?p=132778"},"modified":"2018-06-12T21:36:17","modified_gmt":"2018-06-12T21:36:17","slug":"june-patch-tuesday-microsoft-issues-fixes-for-dns-cortana","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/june-patch-tuesday-microsoft-issues-fixes-for-dns-cortana\/","title":{"rendered":"June Patch Tuesday: Microsoft Issues Fixes for DNS, Cortana"},"content":{"rendered":"<div class=\"media_block\"><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/media.kasperskycontenthub.com\/wp-content\/uploads\/sites\/31\/2013\/04\/07052105\/patch_tuesday.jpg\" class=\"ff-og-image-inserted\"\/><\/div>\n<p>Microsoft has fixed 11 critical bugs in its June Patch Tuesday update, including a Windows DNS-related remote code execution flaw. It also patched an easily exploitable problem in the Cortana voice engine.<\/p>\n<p>One of the most serious issues is a critical remote code execution vulnerability (<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/CVE-2018-8225\">CVE-2018-8225<\/a>) in the Windows Domain Name System (DNS), which could allow an attacker to take full control of the targeted machine. This can be carried out by sending a maliciously crafted DNS packet to the victim endpoint from a DNS server, or using spoofed DNS responses from an attack box, according to Microsoft\u2019s June Patch Tuesday security <a href=\"https:\/\/portal.msrc.microsoft.com\/en-us\/security-guidance\" target=\"_blank\" rel=\"noopener\">bulletin<\/a>.<\/p>\n<p>\u201cThe attacker could attempt to man-in-the-middle a legitimate query,\u201d explained Dustin Childs, researcher at the Zero Day Initiative, in its Patch Tuesday analysis <a href=\"https:\/\/www.zerodayinitiative.com\/blog\/2018\/6\/12\/the-june-2018-security-update-review\" target=\"_blank\" rel=\"noopener\">posted<\/a> on Tuesday. \u201cThe more likely scenario is simply tricking a target DNS server into querying an evil server that sends the corrupted response \u2013 something that can be done from the command line. It\u2019s also something that could be easily scripted. This means there\u2019s a system-level bug in a listening service on critical infrastructure servers, which also means this is wormable.\u201d<\/p>\n<p>He added, \u201c\u2018patch now\u2019 doesn\u2019t even seem forceful enough. I have the sense we\u2019ll be hearing about this bug for a while.\u201d<\/p>\n<p>A privilege-escalation vulnerability rated important in Cortana (<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/CVE-2018-8140\" target=\"_blank\" rel=\"noopener\">CVE-2018-8140<\/a>) meanwhile is due to the voice engine\u2019s service retrieving data from input services \u201cwithout consideration for status,\u201d according to Microsoft. It was <a href=\"https:\/\/www.youtube.com\/watch?v=7AyW0lCCyGI\" target=\"_blank\" rel=\"noopener\">first discussed<\/a> in March at a researcher conference.<\/p>\n<p>\u201cWhile that description from Microsoft is a bit oblique, it seems someone close enough to speak to a Cortana-enabled system could execute programs with elevated privileges,\u201d said Childs. \u201cAgain, the attacker needs physical or console access to the system, so remote attacks not likely \u2013 provided you\u2019re not talking on a speakerphone. Jokes aside, with the proliferation of personal assistants and similar services, bugs in these products will likely become more prevalent in the years to come.\u201d<\/p>\n<p>Researchers put a finer point on it with a few <a href=\"https:\/\/securingtomorrow.mcafee.com\/mcafee-labs\/want-to-break-into-a-locked-windows-10-device-ask-cortana-cve-2018-8140\/\">proof-of-concepts<\/a> for the Cortana flaw, demonstrating a range of attack vectors for accessing confidential information. For instance, after bypassing the locked screen using a simple voice command, McAfee found that it was possible to easily search for confidential information and files using Cortana to search for keywords such as \u201cOneDrive\u201d; and, the researchers were able to execute arbitrary code from the lock screen using Cortana\u2019s contextual menu. In a demo, they were able to carry out a full password reset and then log in on a Windows 10 build.<\/p>\n<p>\u201cThis particular vulnerability is not highly critical, but it is interesting as it targets a growing and popular class of technology: intelligent digital personal assistants,\u201d Lane Thames, senior security researcher at Tripwire, told Threatpost. \u201cWe\u2019ve already seen <a href=\"https:\/\/threatpost.com\/voice-squatting-turns-alexa-google-home-into-silent-spies\/132068\/\" target=\"_blank\" rel=\"noopener\">weaknesses<\/a> recently in Alexa due to third-party application issues. More of these types of problems will start to appear, most likely, in the years to come.\u201d<\/p>\n<p>In total, Microsoft\u2019s June Patch Tuesday roundup included 50 security patches, with 11 listed as critical and 39 rated important. An out-of-band fix meanwhile was <a href=\"https:\/\/threatpost.com\/adobe-flash-player-zero-day-spotted-in-the-wild\/129742\/\" target=\"_blank\" rel=\"noopener\">released for Adobe Flash Player last week<\/a>.<\/p>\n<p>Among the other notable patches is one for a memory corruption vulnerability in Microsoft Edge\u2019s Chakra scripting engine (<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/CVE-2018-8229\">CVE-2018-8229<\/a>); this can be triggered when a victim visits a malicious website, where an attacker could use a specially crafted JavaScript program to execute arbitrary code.\u00a0an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights, Microsoft said.<\/p>\n<p>\u201cBecause JavaScript is so pervasive and needed for many websites to even operate, disabling the Chakra Scripting Engine is not an option, which means the vast majority of Microsoft Edge users are vulnerable to this attack,\u201d said Allan Liska, threat intelligence analyst at Recorded Future, via email. \u201cIt is important to patch Microsoft Edge as soon as possible to prevent this attack.\u201d<\/p>\n<p>There\u2019s also a critical HTTP Protocol Stack remote code execution vulnerability (<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/CVE-2018-8231\">CVE-2018-8231<\/a>) affecting the web server component http.sys, which confers elevated privileges to a remote attacker. The attacker can cause code execution by sending a malformed packet to a target server.<\/p>\n<p>\u201cThe patch notes that, \u2018in most situations, an unauthenticated attacker\u2019 could do this,\u201d ZDI\u2019s Childs said. \u201cIt\u2019s unclear what those other situations may be, but that puts this bug pretty close to the wormable category as well. Either way, this should also be near the top of your test and patch priority list.\u201d<\/p>\n<p>Other vulnerabilities being addressed include a remote code execution flaw in Excel (<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/CVE-2018-8248\">CVE-2018-8248<\/a>); two privilege-escalation vulnerabilities in SharePoint Server and one in Office Web Apps Server; and seven separate Device Guard vulnerabilities in Windows 10 Enterprise and Server 2016 which allowed code integrity policies to be bypassed.<\/p>\n<p>\u201cJune\u2019s Patch Tuesday is rather run-of-the-mill, with a total of 50 vulnerabilities being addressed by Microsoft,\u201d said Greg Wiseman, senior security researcher at Rapid7, in an email. \u201cNone of the Microsoft vulnerabilities patched today have been seen in the wild, although\u00a0<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/CVE-2018-8267\">CVE-2018-8267\u00a0<\/a>(an RCE vulnerability in Internet Explorer) had been publicly disclosed before today\u2019s release and is likely to be exploited soon if it hasn\u2019t already been.\u201d<\/p>\n<p>READ MORE <a href=\"https:\/\/threatpost.com\/june-patch-tuesday-microsoft-issues-fixes-for-dns-cortana\/132778\/\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the most serious issues is a critical remote code execution vulnerability in the Windows DNS, which could allow an attacker to take full control of the targeted machine. READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":2865,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[3],"tags":[517,446,1236,230,173,19,69],"class_list":["post-2864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-threatpost","tag-cortana","tag-dns","tag-june-2018","tag-microsoft","tag-patch-tuesday","tag-vulnerabilities","tag-web-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>June Patch Tuesday: Microsoft Issues Fixes for DNS, Cortana 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta 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