{"id":46181,"date":"2022-04-13T21:30:01","date_gmt":"2022-04-13T21:30:01","guid":{"rendered":"https:\/\/www.threatshub.org\/blog\/apache-says-struts-2-security-bug-wasnt-fully-fixed-in-2020\/"},"modified":"2022-04-13T21:30:01","modified_gmt":"2022-04-13T21:30:01","slug":"apache-says-struts-2-security-bug-wasnt-fully-fixed-in-2020","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/apache-says-struts-2-security-bug-wasnt-fully-fixed-in-2020\/","title":{"rendered":"Apache says Struts 2 security bug wasn&#8217;t fully fixed in 2020"},"content":{"rendered":"<p>Apache has taken another shot at fixing a critical remote code execution vulnerability in its Struts 2 framework for Java applications \u2013 because the first patch, issued in 2020, didn&#8217;t fully do the trick.<\/p>\n<p>The <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/cwiki.apache.org\/confluence\/display\/WW\/S2-062\">security flaw<\/a> exists in Struts versions 2.0.0 to 2.5.29, and an attacker could exploit it to gain control of a vulnerable system.<\/p>\n<p>Uncle Sam&#8217;s CISA has <a href=\"https:\/\/www.cisa.gov\/uscert\/ncas\/current-activity\/2022\/04\/12\/apache-releases-security-advisory-struts-2\" rel=\"nofollow\">urged<\/a> organizations to upgrade to a <a href=\"https:\/\/cwiki.apache.org\/confluence\/display\/WW\/Version+Notes+2.5.30\" rel=\"nofollow\">patched version<\/a>, eg 2.5.30, as soon as possible.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"condor\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>Struts is widely used, and this new-old security flaw is similar to the OGNL injection bug that was abused in the massive <a href=\"https:\/\/www.theregister.com\/2017\/10\/02\/equifax_ceo_richard_smith_congressional_testimony\/\">Equifax breach<\/a> in 2017.&nbsp;<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xmd=\",fluid,mpu,leaderboard,\" data-lg=\",fluid,mpu,leaderboard,\" data-xlg=\",fluid,billboard,superleaderboard,mpu,leaderboard,\" data-xxlg=\",fluid,billboard,superleaderboard,brandwidth,brandimpact,leaderboard,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<div class=\"adun_eagle_desktop_story_wrapper\">\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"mid\" data-raptor=\"eagle\" data-xxlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<\/p><\/div>\n<p>Object-Graph Navigation Language (<a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/commons.apache.org\/proper\/commons-ognl\/\">OGNL<\/a>) is an expression language for Java that allows programmers to, among other things, set and get Java object properties. As security firm Qualys <a href=\"https:\/\/blog.qualys.com\/vulnerabilities-threat-research\/2021\/09\/21\/apache-struts-2-double-ognl-evaluation-vulnerability-cve-2020-17530\" rel=\"nofollow\">warned<\/a> last year, &#8220;being able to create properties and change the code execution, it&#8217;s prone to critical security flaws.&#8221;<\/p>\n<p>Back in December 2020, bug hunters Alvaro Munoz of GitHub and Masato Anzai of Aeye Security Lab discovered an <a href=\"https:\/\/www.theregister.com\/2020\/12\/12\/in_brief_security\/\">OGNL injection vulnerability<\/a> in Struts 2, tracked as <a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2020-17530\" rel=\"nofollow\">CVE-2020-17530<\/a>, which received a 9.8 out of 10 in terms of CVSS severity.&nbsp;<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>The patch for that oversight was not complete, it now turns out. This week we learned that if an application performs forced OGNL evaluation, using the <code>%{...}<\/code> syntax, it is still possible for double evaluation to occur from malicious user input, leading to exploitation. In other words, the patched bug could still be abused by carefully crafted attacker-supplied data to hijack a vulnerable system.<\/p>\n<p>&#8220;Using forced OGNL evaluation on untrusted user input can lead to a remote code execution and security degradation,&#8221; Apache noted in its security bulletin, both in 2020 and now.<\/p>\n<p>Back then, Apache advised developers to avoid using forced OGNL evaluation on untrusted user input and also to upgrade to Struts 2.5.26, which the software foundation said will check expression evaluation to ensure it won&#8217;t lead to double trouble.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" id=\"story_eagle_xsm_sm_md_xmd_lg_xlg\" data-pos=\"mid\" data-raptor=\"eagle\" data-xsm=\",mpu,dmpu,\" data-sm=\",mpu,dmpu,\" data-md=\",mpu,dmpu,\" data-xmd=\",mpu,dmpu,\" data-lg=\",mpu,dmpu,\" data-xlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YldgH4ik9wHgiCr5yfr1LgAAARQ&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>More recently, Chris McCown <a href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2022\/04\/12\/6\" rel=\"nofollow\">discovered<\/a> the fix for CVE-2020-17530 was incomplete. As a result, once again Apache has sounded the upgrade-Struts-now alarm.&nbsp;<\/p>\n<h3 class=\"crosshead\"> <span>Java bugs keep on coming<\/span><br \/>\n<\/h3>\n<p>The Struts vulnerability comes on the heels of other Java flaws.&nbsp;<\/p>\n<p>Late last month, VMware threat researchers discovered an RCE vulnerability in the Java-based <a href=\"https:\/\/www.theregister.com\/2022\/03\/31\/spring_vuln\/\">Spring Framework<\/a>, and almost immediately attackers began taking advantage of the bug. Check Point analysts saw about <a href=\"https:\/\/www.theregister.com\/2022\/04\/11\/in_brief_security\/\">37,000 exploitation attempts<\/a> in the first weekend alone, and said about 16 percent of organizations around the globe were impacted by the programming blunder.&nbsp;<\/p>\n<p>More recently, Trend Micro researchers said criminals are exploiting the vuln to run Mirai <a href=\"https:\/\/www.theregister.com\/2022\/04\/11\/spring4shell-flaw-exploited-mirai-botnet\/\">botnet malware<\/a>.<\/p>\n<p>Meanwhile, Palo Alto Networks&#8217; Unit42 security analysts <a href=\"https:\/\/unit42.paloaltonetworks.com\/cve-2022-22965-springshell\/\" rel=\"nofollow\">wrote<\/a> that they expect the Spring bug, dubbed Spring4Shell, to &#8220;become fully weaponized and abused on a larger scale,&#8221; because exploitation of the flaw is &#8220;straightforward and all the relevant technical details have already gone viral on the internet.&#8221;<\/p>\n<p>A large number of organizations are still struggling to patch the Log4j vulnerability in the extensively used Apache logging library. The flaw was discovered late last year, and as of March miscreants were still <a href=\"https:\/\/www.theregister.com\/2022\/03\/30\/log4j-malware-sophos-vmware-horizon\/\">exploiting the hole<\/a> to install backdoors and crypto-mining malware.<\/p>\n<p>According to Qualys, nearly <a href=\"https:\/\/www.itpro.co.uk\/security\/zero-day-exploit\/361847\/log4shell-zero-day-vulnerability-numbers-revealed\" rel=\"nofollow\">1 million<\/a> exploitation attempts were made in 72 hours following the Log4j vulnerability disclosure in December 2021. Two months later, 30 percent of Log4j instances apparently <a href=\"https:\/\/blog.qualys.com\/vulnerabilities-threat-research\/2022\/03\/18\/qualys-study-reveals-how-enterprises-responded-to-log4shell#1\" rel=\"nofollow\">remained vulnerable<\/a> to attack. \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2022\/04\/13\/apache_struts_bug_new_patch\/\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>But this time the patch should do the trick Apache has taken another shot at fixing a critical remote code execution vulnerability in its Struts 2 framework for Java applications \u2013 because the first patch, issued in 2020, didn&#8217;t fully do the trick.\u2026 READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[],"class_list":["post-46181","post","type-post","status-publish","format-standard","hentry","category-the-register"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Apache says Struts 2 security bug wasn&#039;t fully fixed in 2020 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 name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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