{"id":35330,"date":"2020-06-03T15:45:00","date_gmt":"2020-06-03T15:45:00","guid":{"rendered":"https:\/\/www.darkreading.com\/attacks-breaches\/many-exchange-servers-are-still-vulnerable-to-remote-exploit\/d\/d-id\/1337986"},"modified":"2020-06-03T15:45:00","modified_gmt":"2020-06-03T15:45:00","slug":"many-exchange-servers-are-still-vulnerable-to-remote-exploit","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/many-exchange-servers-are-still-vulnerable-to-remote-exploit\/","title":{"rendered":"Many Exchange Servers Are Still Vulnerable to Remote Exploit"},"content":{"rendered":"<header>\n<\/header>\n<p><span class=\"strong black\">A privilege-escalation vulnerability patched in February by Microsoft continues to affect Exchange servers, with more than 80% of Internet-connected servers remaining vulnerable, one firm reports.<\/span> <\/p>\n<p class=\"p1\">Almost four months after Microsoft patched a serious vulnerability in Microsoft Exchange servers, more than 350,000 Internet-connected servers continue to be vulnerable to the privilege escalation flaw, according to a report published on Wednesday.<\/p>\n<p class=\"p1\">While Microsoft patched the issue (CVE-2020-0688) in February, more than 80% of Internet-connected Microsoft Exchange servers remain vulnerable, requiring attackers to find or phish only a single valid credential to completely compromise a company&#8217;s email system, threat-protection firm Rapid7 stated in its &#8220;2020: Q1 Threat Report.&#8221; According to the company&#8217;s scan data, only 7,000 systems \u2014 about 2% of the total \u2014 have been patched in the four weeks between the end of March and end of April, indicating that companies are not prioritizing the issue.<\/p>\n<p class=\"p1\">While Microsoft has only rated the vulnerability as &#8220;important,&#8221; attackers&#8217; focus on collecting credentials means that the barrier to exploiting the vulnerability is actually quite low, says Wade Woolwine, principal security researcher at Rapid7.<\/p>\n<p class=\"p1\">&#8220;This vulnerability gives attackers something to do with all those credentials that they have phished from your employees,&#8221; he says. &#8220;It&#8217;s really important for companies to patch these types of vulnerabilities, even if they are on a defined 30-day patch cycle.&#8221;<\/p>\n<p class=\"p1\">Email and messaging servers are a popular target of sophisticated hackers and state-sponsored espionage actors. Russia&#8217;s military intelligence agency, for example, has <a href=\"https:\/\/www.darkreading.com\/attacks-breaches\/rare-nsa-advisory-about-russia-based-cyberattacks-unlikely-to-stop-them\/d\/d-id\/1337962\" target=\"_blank\" rel=\"noopener noreferrer\">targeted vulnerable EXIM mail servers<\/a>, exploiting them to gain access to the contents of organization&#8217;s e-mail messages. Two years after Microsoft closed security holes in the Outlook mail client, Iranian hackers continued to attempt <a href=\"https:\/\/www.darkreading.com\/us-military-warns-companies-to-look-out-for-iranian-outlook-exploits\/d\/d-id\/1335150\" target=\"_blank\" rel=\"noopener noreferrer\">to exploit the vulnerability<\/a>, often with some success, the US Cyber Command warned last year.<\/p>\n<p class=\"p1\">The latest Microsoft Exchange vulnerability is caused because the software does not generate unique encryption keys at the time of installation, <a href=\"https:\/\/www.thezdi.com\/blog\/2020\/2\/24\/cve-2020-0688-remote-code-execution-on-microsoft-exchange-server-through-fixed-cryptographic-keys\" target=\"_blank\" rel=\"noopener noreferrer\">according to Trend Micro&#8217;s Zero-Day Initiative<\/a>, which was credited by Microsoft for reporting the vulnerability.<\/p>\n<p class=\"p1\">Rapid7, which regularly scans the Internet to gather data on vulnerable software, said the vulnerability should be considered critical, adding that it &#8220;terrifies us.&#8221;<\/p>\n<p class=\"p1\">&#8220;The sensitive data that is exchanged over email, and the ease with which an attacker can social engineer their way into valid credentials, combined with the limitless impact of owning access to executive mailboxes makes this worthy of a critical priority, drop-everything-else-now patch,&#8221; <a href=\"https:\/\/www.rapid7.com\/research\/report\/2020Q1-threat-report\/\" target=\"_blank\" rel=\"noopener noreferrer\">the company said in its report<\/a>.<\/p>\n<p class=\"p1\">The report underscored that compromised credentials continue to pose a significant threat to companies, with 74% of incidents reported by the firm&#8217;s managed detection and response (MDR) to clients involving compromised credentials. Using credentials against Web-accessible applications, cloud services, and API servers continues to be one of the most significant data breach threats, <a href=\"https:\/\/www.darkreading.com\/application-security\/web-application-attacks-double-from-2019-verizon-dbir\/d\/d-id\/1337860\" target=\"_blank\" rel=\"noopener noreferrer\">second on the list of common attack methods only behind phishing<\/a>, according to Verizon&#8217;s &#8220;2020 Data Breach Investigations Report.&#8221;<\/p>\n<p class=\"p1\">&#8220;Attackers love credentials because they are very easy to get,&#8221; Rapid7&#8217;s Woolwine says. &#8220;It is always \u2014 at least, most often \u2014 about credentials. With everything moving to the cloud, those credentials are just so much more valuable.&#8221;<\/p>\n<p class=\"p1\">Yet Rapid7 also found other threats \u2014 including attacks on the technology used by remote workers to connect to their company&#8217;s network. Virtual private network devices \u2014 including those from Cisco, Citrix, Fortinet, and Pulse Secure \u2014 all had vulnerabilities targeted by Internet-wide scans, suggesting that attackers are likely looking to compromise the devices to use as a beachhead into targeted firms.<\/p>\n<p class=\"p1\">At least one vulnerability has already led to breaches at companies. Out of the 17 breaches investigated by Rapid7 in the first quarter, nine were due to a critical vulnerability in Citrix NetScaler.<\/p>\n<p class=\"p1\">Overall, however, the company did not see a massive increase in compromises as businesses had to adapt to stay-at-home orders at the end of March while the coronavirus pandemic&#8217;s impact spread. The 17 breaches investigated by the firm during the quarter were about the same as previous quarters, Woolwine says.<\/p>\n<p class=\"p1\">&#8220;We were really expecting pandemonium,&#8221; he says. &#8220;If you look at the perfect storm of fear and frustration and political issues, the pandemic appears to deliver the sort of chaos that attackers thrive on. But we didn&#8217;t see nearly as many compromises as we expected.&#8221;<\/p>\n<p class=\"p3\"><strong>Related Content:<\/strong><\/p>\n<p><strong><a href=\"https:\/\/www.darkreading.com\/operations\/latest-security-news-and-commentary-about-covid-19\/d\/d-id\/1337452\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/img.deusm.com\/darkreading\/MarilynCohodas\/VIRTUALSUMMIT_DR20_320x50.jpg\" alt width=\"450\" height=\"70\"><\/a><\/strong><\/p>\n<div><em><strong><strong>Learn from industry experts in a setting that is conducive to interaction and conversation about how to prepare for that &#8220;really&nbsp;<\/strong><strong>&nbsp;bad day&#8221; in cybersecurity. Click for<\/strong><strong>&nbsp;<a href=\"https:\/\/events.darkreading.com\/virtualsummit\/\" target=\"_blank\" rel=\"noopener noreferrer\">more information and to register<\/a>.&nbsp;<\/strong><\/strong><\/em><\/div>\n<p><em><strong><strong>&nbsp;<\/strong><\/strong><\/em><\/p>\n<p><span class=\"italic\">Veteran technology journalist of more than 20 years. Former research engineer. Written for more than two dozen publications, including CNET News.com, Dark Reading, MIT&#8217;s Technology Review, Popular Science, and Wired News. Five awards for journalism, including Best Deadline &#8230; <a href=\"https:\/\/www.darkreading.com\/author-bio.asp?author_id=1161\">View Full Bio<\/a><\/span> <\/p>\n<p><strong>Recommended Reading:<\/strong><\/p>\n<p><span class=\"smaller strong red allcaps\">More Insights<\/span><\/p>\n<p> Read More <a href=\"https:\/\/www.darkreading.com\/attacks-breaches\/many-exchange-servers-are-still-vulnerable-to-remote-exploit\/d\/d-id\/1337986?_mc=rss_x_drr_edt_aud_dr_x_x-rss-simple\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A privilege-escalation vulnerability patched in February by Microsoft continues to affect Exchange servers, with more than 80% of Internet-connected servers remaining vulnerable, one firm reports. Read More <a href=\"https:\/\/www.darkreading.com\/attacks-breaches\/many-exchange-servers-are-still-vulnerable-to-remote-exploit\/d\/d-id\/1337986?_mc=rss_x_drr_edt_aud_dr_x_x-rss-simple\">HERE<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[151],"tags":[],"class_list":["post-35330","post","type-post","status-publish","format-standard","hentry","category-darkreading-ti"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Many Exchange Servers Are Still Vulnerable to Remote Exploit 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 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