{"id":6752,"date":"2025-06-11T09:39:24","date_gmt":"2025-06-11T09:39:24","guid":{"rendered":"http:\/\/localhost\/?p=6752"},"modified":"2025-06-11T09:39:24","modified_gmt":"2025-06-11T09:39:24","slug":"exploit-for-cve-2025-22870","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=6752","title":{"rendered":"Exploit for CVE-2025-22870"},"content":{"rendered":"<h2>Security Update News<\/h2>\n<h3>Update Information<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Title<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Exploit for CVE-2025-22870<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Update ID<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">CE5D0C3C-D99E-55CC-9BBE-EF74A92BB9A8<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Type<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">githubexploit<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Published<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">2025-06-08T00:40:42<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Last Updated<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">2025-06-08T01:02:44<\/td>\n<\/tr>\n<\/table>\n<h3>Security Impact<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">CVSS Score<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">4.4<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Severity<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd; color: #ffaa00; font-weight: bold;\">MEDIUM<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Attack Vector<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">LOCAL<\/td>\n<\/tr>\n<\/table>\n<h3>Affected CVEs<\/h3>\n<div style=\" padding: 15px; border: 1px solid #ddd; margin-bottom: 20px;\">\n<ul style=\"margin: 0; padding-left: 20px;\">\n<li>CVE-2025-22870<\/li>\n<\/ul>\n<\/div>\n<h3>Update Details<\/h3>\n<div style=\"; padding: 15px; border-left: 4px solid #4CAF50; margin-bottom: 20px;\">\n# PoC \u2013 CVE-2025-22870 \u2013 HTTP Proxy Bypass via IPv6 Zone ID in Go<\/p>\n<p>## Summary<\/p>\n<p>This Proof of Concept demonstrates the exploitation of CVE-2025-22870, a vulnerability in the `golang.org\/x\/net\/http\/httpproxy` package (prior to v0.36.0), which can be used to bypass HTTP proxy restrictions by abusing the way IPv6 zone identifiers are matched against NO_PROXY patterns.<\/p>\n<p>## Vulnerable Component<\/p>\n<p>&#8211; **Package**: `golang.org\/x\/net\/http\/httpproxy`<br \/>&#8211; **Affected Versions**: < 0.36.0<br \/>&#8211; **Patched Version**: 0.36.0<br \/>&#8211; **Discovered by**: Juho Fors\u00e9n (Mattermost)<br \/>&#8211; **Go Issue**: https:\/\/go.dev\/issue\/71984<br \/>&#8211; **GitHub Advisory**: https:\/\/github.com\/advisories\/GHSA-qxp5-gwg8-xv66<\/p>\n<p>## Vulnerability Description<\/p>\n<p>When the `NO_PROXY` environment variable is set to restrict certain domains from being routed through a proxy (e.g., `NO_PROXY=*.example.com`), a specially crafted request to a host with an **IPv6 zone ID** (e.g., `[::1%25.example.com]`) may **incorrectly match** and avoid being proxied. This results in **proxy bypass**, which could allow **Server-Side Request Forgery (SSRF)** under certain conditions.<\/p>\n<p>## Impact<\/p>\n<p>This vulnerability can be leveraged to send requests directly to internal or local services **while evading configured proxies**, even if domains were supposedly protected by `NO_PROXY`.<\/p>\n<p>## Vulnerability Details<\/p>\n<p>The PoC exploits a vulnerability in the `golang.org\/x\/net\/http\/httpproxy` package, specifically in the way it parses IPv6 zone identifiers when matching against `NO_PROXY` rules.<\/p>\n<p>The payload used is:<\/p>\n<p>&#8220;`go<br \/>[::1%25.example.com]:7777<br \/>&#8220;`<\/p>\n<p>Due to the parsing bug in the vulnerable package, this address bypasses the proxy despite matching NO_PROXY.<\/p>\n<\/div>\n<p><a href=\"https:\/\/github.com\/JoshuaProvoste\/CVE-2025-22870\" target=\"_blank\" style=\"display: inline-block; color: white; padding: 10px 20px; text-decoration: none; border-radius: 4px;\">View Advisory Details<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Security Update News Update Information Title Exploit for CVE-2025-22870 Update ID CE5D0C3C-D99E-55CC-9BBE-EF74A92BB9A8 Type githubexploit Published 2025-06-08T00:40:42 Last Updated 2025-06-08T01:02:44 Security Impact CVSS Score 4.4 Severity&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[6,8,126,12,32,21,13,7,11,5],"class_list":["post-6752","post","type-post","status-publish","format-standard","hentry","category-category_news","tag-cve","tag-cvss","tag-cvss-44","tag-exploit","tag-githubexploit","tag-medium","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Exploit for CVE-2025-22870 - zero redgem<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zero.redgem.net\/?p=6752\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Exploit for CVE-2025-22870 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"Security Update News Update Information Title Exploit for CVE-2025-22870 Update ID CE5D0C3C-D99E-55CC-9BBE-EF74A92BB9A8 Type githubexploit Published 2025-06-08T00:40:42 Last Updated 2025-06-08T01:02:44 Security Impact CVSS Score 4.4 Severity...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zero.redgem.net\/?p=6752\" \/>\n<meta property=\"og:site_name\" content=\"zero redgem\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-11T09:39:24+00:00\" \/>\n<meta name=\"author\" content=\"invoker\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"invoker\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/?p=6752#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/?p=6752\"},\"author\":{\"name\":\"invoker\",\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#\\\/schema\\\/person\\\/fbfeae8dfad117ac08a7621bee1a1dca\"},\"headline\":\"Exploit for CVE-2025-22870\",\"datePublished\":\"2025-06-11T09:39:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/?p=6752\"},\"wordCount\":302,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#organization\"},\"keywords\":[\"CVE\",\"CVSS\",\"CVSS-4.4\",\"exploit\",\"githubexploit\",\"MEDIUM\",\"news\",\"Security\",\"tapic\",\"Vulnerability\"],\"articleSection\":[\"category_news\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/zero.redgem.net\\\/?p=6752#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/?p=6752\",\"url\":\"https:\\\/\\\/zero.redgem.net\\\/?p=6752\",\"name\":\"Exploit for CVE-2025-22870 - zero redgem\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#website\"},\"datePublished\":\"2025-06-11T09:39:24+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/?p=6752#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/zero.redgem.net\\\/?p=6752\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/?p=6752#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/zero.redgem.net\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Exploit for CVE-2025-22870\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#website\",\"url\":\"https:\\\/\\\/zero.redgem.net\\\/\",\"name\":\"zero redgem\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/zero.redgem.net\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#organization\",\"name\":\"zero redgem\",\"url\":\"https:\\\/\\\/zero.redgem.net\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"\",\"contentUrl\":\"\",\"width\":191,\"height\":188,\"caption\":\"zero redgem\"},\"image\":{\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/zero.redgem.net\\\/#\\\/schema\\\/person\\\/fbfeae8dfad117ac08a7621bee1a1dca\",\"name\":\"invoker\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f17c01d7338e6932bcde121cf83569393df3374625d25afd62677cfb528f2e3e?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f17c01d7338e6932bcde121cf83569393df3374625d25afd62677cfb528f2e3e?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f17c01d7338e6932bcde121cf83569393df3374625d25afd62677cfb528f2e3e?s=96&d=mm&r=g\",\"caption\":\"invoker\"},\"sameAs\":[\"https:\\\/\\\/zero.redgem.net\"],\"url\":\"https:\\\/\\\/zero.redgem.net\\\/?author=1\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Exploit for CVE-2025-22870 - zero redgem","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/zero.redgem.net\/?p=6752","og_locale":"en_US","og_type":"article","og_title":"Exploit for CVE-2025-22870 - zero redgem","og_description":"Security Update News Update Information Title Exploit for CVE-2025-22870 Update ID CE5D0C3C-D99E-55CC-9BBE-EF74A92BB9A8 Type githubexploit Published 2025-06-08T00:40:42 Last Updated 2025-06-08T01:02:44 Security Impact CVSS Score 4.4 Severity...","og_url":"https:\/\/zero.redgem.net\/?p=6752","og_site_name":"zero redgem","article_published_time":"2025-06-11T09:39:24+00:00","author":"invoker","twitter_card":"summary_large_image","twitter_misc":{"Written by":"invoker","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/zero.redgem.net\/?p=6752#article","isPartOf":{"@id":"https:\/\/zero.redgem.net\/?p=6752"},"author":{"name":"invoker","@id":"https:\/\/zero.redgem.net\/#\/schema\/person\/fbfeae8dfad117ac08a7621bee1a1dca"},"headline":"Exploit for CVE-2025-22870","datePublished":"2025-06-11T09:39:24+00:00","mainEntityOfPage":{"@id":"https:\/\/zero.redgem.net\/?p=6752"},"wordCount":302,"commentCount":0,"publisher":{"@id":"https:\/\/zero.redgem.net\/#organization"},"keywords":["CVE","CVSS","CVSS-4.4","exploit","githubexploit","MEDIUM","news","Security","tapic","Vulnerability"],"articleSection":["category_news"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/zero.redgem.net\/?p=6752#respond"]}]},{"@type":"WebPage","@id":"https:\/\/zero.redgem.net\/?p=6752","url":"https:\/\/zero.redgem.net\/?p=6752","name":"Exploit for CVE-2025-22870 - zero redgem","isPartOf":{"@id":"https:\/\/zero.redgem.net\/#website"},"datePublished":"2025-06-11T09:39:24+00:00","breadcrumb":{"@id":"https:\/\/zero.redgem.net\/?p=6752#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/zero.redgem.net\/?p=6752"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/zero.redgem.net\/?p=6752#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/zero.redgem.net\/"},{"@type":"ListItem","position":2,"name":"Exploit for CVE-2025-22870"}]},{"@type":"WebSite","@id":"https:\/\/zero.redgem.net\/#website","url":"https:\/\/zero.redgem.net\/","name":"zero redgem","description":"","publisher":{"@id":"https:\/\/zero.redgem.net\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/zero.redgem.net\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/zero.redgem.net\/#organization","name":"zero redgem","url":"https:\/\/zero.redgem.net\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/zero.redgem.net\/#\/schema\/logo\/image\/","url":"","contentUrl":"","width":191,"height":188,"caption":"zero redgem"},"image":{"@id":"https:\/\/zero.redgem.net\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/zero.redgem.net\/#\/schema\/person\/fbfeae8dfad117ac08a7621bee1a1dca","name":"invoker","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/f17c01d7338e6932bcde121cf83569393df3374625d25afd62677cfb528f2e3e?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/f17c01d7338e6932bcde121cf83569393df3374625d25afd62677cfb528f2e3e?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/f17c01d7338e6932bcde121cf83569393df3374625d25afd62677cfb528f2e3e?s=96&d=mm&r=g","caption":"invoker"},"sameAs":["https:\/\/zero.redgem.net"],"url":"https:\/\/zero.redgem.net\/?author=1"}]}},"_links":{"self":[{"href":"https:\/\/zero.redgem.net\/index.php?rest_route=\/wp\/v2\/posts\/6752","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zero.redgem.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zero.redgem.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zero.redgem.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zero.redgem.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6752"}],"version-history":[{"count":0,"href":"https:\/\/zero.redgem.net\/index.php?rest_route=\/wp\/v2\/posts\/6752\/revisions"}],"wp:attachment":[{"href":"https:\/\/zero.redgem.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zero.redgem.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zero.redgem.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}