{"id":253709,"date":"2025-12-27T08:21:13","date_gmt":"2025-12-27T08:21:13","guid":{"rendered":"https:\/\/www.europesays.com\/ie\/253709\/"},"modified":"2025-12-27T08:21:13","modified_gmt":"2025-12-27T08:21:13","slug":"new-mongodb-flaw-lets-unauthenticated-attackers-read-uninitialized-memory","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ie\/253709\/","title":{"rendered":"New MongoDB Flaw Lets Unauthenticated Attackers Read Uninitialized Memory"},"content":{"rendered":"<p>\ue802Dec 27, 2025\ue804Ravie LakshmananDatabase Security \/ Vulnerability<\/p>\n<p><a href=\"https:\/\/www.europesays.com\/ie\/wp-content\/uploads\/2025\/12\/mongodb.jpg\" style=\"clear: left; display: block; float: left;  text-align: center;\"><img decoding=\"async\" src=\"https:\/\/www.europesays.com\/ie\/wp-content\/uploads\/2025\/12\/mongodb.jpg\" alt=\"MongoDB Flaw\" border=\"0\" data-original-height=\"470\" data-original-width=\"900\" title=\"MongoDB Flaw\"\/><\/a><\/p>\n<p>A high-severity security flaw has been disclosed in MongoDB that could allow unauthenticated users to read uninitialized heap memory.<\/p>\n<p>The vulnerability, tracked as <strong>CVE-2025-14847<\/strong> (CVSS score: 8.7), has been described as a case of <a href=\"https:\/\/cwe.mitre.org\/data\/definitions\/130.html\" rel=\"noopener nofollow\" target=\"_blank\">improper handling of length parameter inconsistency<\/a>, which arises when a program fails to appropriately tackle scenarios where a length field is inconsistent with the actual length of the associated data.<\/p>\n<p>&#8220;Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client,&#8221; according to a <a href=\"https:\/\/www.cve.org\/CVERecord?id=CVE-2025-14847\" rel=\"noopener nofollow\" target=\"_blank\">description<\/a> of the flaw in CVE.org.<\/p>\n<p><a href=\"https:\/\/thehackernews.uk\/ransomware_dragon_d\" rel=\"nofollow noopener sponsored\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" alt=\"Cybersecurity\" src=\"https:\/\/www.europesays.com\/ie\/wp-content\/uploads\/2025\/12\/ransomware_dragon_d.png\" width=\"729\" height=\"91\"\/><\/a><\/p>\n<p>The flaw impacts the following versions of the database &#8211;<\/p>\n<ul>\n<li>MongoDB 8.2.0 through 8.2.3<\/li>\n<li>MongoDB 8.0.0 through 8.0.16<\/li>\n<li>MongoDB 7.0.0 through 7.0.26<\/li>\n<li>MongoDB 6.0.0 through 6.0.26<\/li>\n<li>MongoDB 5.0.0 through 5.0.31<\/li>\n<li>MongoDB 4.4.0 through 4.4.29<\/li>\n<li>All MongoDB Server v4.2 versions<\/li>\n<li>All MongoDB Server v4.0 versions<\/li>\n<li>All MongoDB Server v3.6 versions<\/li>\n<\/ul>\n<p>The issue has been addressed in MongoDB versions 8.2.3, 8.0.17, 7.0.28, 6.0.27, 5.0.32, and 4.4.30.<\/p>\n<p>&#8220;An client-side exploit of the Server&#8217;s zlib implementation can return uninitialized heap memory without authenticating to the server,&#8221; MongoDB <a href=\"https:\/\/jira.mongodb.org\/browse\/SERVER-115508\" rel=\"noopener nofollow\" target=\"_blank\">said<\/a>. &#8220;We strongly recommend upgrading to a fixed version as soon as possible.&#8221;<\/p>\n<p><a href=\"https:\/\/thehackernews.uk\/zscaler-ai-event-d\" rel=\"nofollow noopener sponsored\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" alt=\"Cybersecurity\" src=\"https:\/\/www.europesays.com\/ie\/wp-content\/uploads\/2025\/12\/zz-d.png\" width=\"729\" height=\"91\"\/><\/a><\/p>\n<p>If immediate update is not an option, it&#8217;s recommended to <a href=\"https:\/\/www.mongodb.com\/docs\/drivers\/node\/current\/connect\/connection-options\/network-compression\/\" rel=\"noopener nofollow\" target=\"_blank\">disable zlib compression<\/a> on the MongoDB Server by starting mongod or mongos with a <a href=\"https:\/\/www.mongodb.com\/docs\/manual\/reference\/program\/mongod\/#std-option-mongod.--networkMessageCompressors\" rel=\"noopener nofollow\" target=\"_blank\">networkMessageCompressors<\/a> or a <a href=\"https:\/\/www.mongodb.com\/docs\/manual\/reference\/configuration-options\/#mongodb-setting-net.compression.compressors\" rel=\"noopener nofollow\" target=\"_blank\">net.compression.compressors<\/a> option that explicitly omits zlib. The other compressor options supported by MongoDB are snappy and zstd.<\/p>\n<p>&#8220;CVE-2025-14847 allows a remote, unauthenticated attacker to trigger a condition in which the MongoDB server may return uninitialized memory from its heap,&#8221; OP Innovate <a href=\"https:\/\/op-c.net\/blog\/mongodb-zlib-protocol-vulnerability-cve-2025-14847\/\" rel=\"noopener nofollow\" target=\"_blank\">said<\/a>. &#8220;This could result in the disclosure of sensitive in-memory data, including internal state information, pointers, or other data that may assist an attacker in further exploitation.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"\ue802Dec 27, 2025\ue804Ravie LakshmananDatabase Security \/ Vulnerability A high-severity security flaw has been disclosed in MongoDB that could&hellip;\n","protected":false},"author":2,"featured_media":253710,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74],"tags":[21715,21710,21703,21702,21704,21705,21706,3600,18,21707,21708,21712,19,21713,17,11951,21711,21709,82,21714],"class_list":{"0":"post-253709","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-technology","8":"tag-computer-security","9":"tag-cyber-attacks","10":"tag-cyber-news","11":"tag-cyber-security-news","12":"tag-cyber-security-news-today","13":"tag-cyber-security-updates","14":"tag-cyber-updates","15":"tag-data-breach","16":"tag-eire","17":"tag-hacker-news","18":"tag-hacking-news","19":"tag-how-to-hack","20":"tag-ie","21":"tag-information-security","22":"tag-ireland","23":"tag-network-security","24":"tag-ransomware-malware","25":"tag-software-vulnerability","26":"tag-technology","27":"tag-the-hacker-news"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@ie\/115790563933543731","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts\/253709","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/comments?post=253709"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts\/253709\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/media\/253710"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/media?parent=253709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/categories?post=253709"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/tags?post=253709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}