----- Begin Hush Signed Message from ade245@hushmail.com ----- -=[ SECURITY ADVISORY ]=- McAfee ASaP Virusscan - myCIO HTTP Server Directory Traversal Vulnerabilty Date: 28 June 2001 Impact: HIGH Affected: Any machine running the McAfee Agent ASaP VirusScan Software Tested on: NT Workstation 4.0, 2000 Professional Overview -------- McAfee ASap Virusscan is a Web-based, managed and updated Anti-Virus Service for the Desktop Environment. On setup agent software is installed on the client machine. This software incorporates what is known as "Rumour Technology" that facilitates in the transfer of virus definitions between neigbouring machines. This agent software runs as a service ("McAfee Agent") under the local system account and uses a light weight HTTP server that listens on port 6515. Description ----------- This web server is restricted to serve files that are located under \winnt\mycio\agent\rmrcache , however it is possible to break out of this by using a specially formatted directory traversal URL. This means that an attacker can connect to the webserver and view and/or download any file that resides on the target box. Due to the fact that the service is running as local system NTFS permissions are redundant. Example ------- To view the contents of WinNT/Repair enter the following URL into a web browser: HTTP://:6515/.../.../.../.../winnt/repair Workaround ---------- Disable the McAfee Agent service or alternatively run it under a local user account and set the NTFS permissions accordingly. Notes ----- McAfee where notified of this issue 28-June-2001 ----- Begin Hush Signature v1.3 ----- CqnHbxr849s+SIAlsEWQMkOyxzMYI0IxAT3Iu/barfSw92Cf5YKbosXkv8qdeNDKSUkS 2R69rXhvAaDngmcreEcOvFZRrGQ1EWyQdczKYceg4sphiNwhRYYqbYWYPkhJyfMP4+Be MmfYg4runAF62i8PCzSqUgnQMAuFG3bWb4XFFwDbGIwREX7OIc6KFc3Xd7Cc3+k4VVgs /LUxchUhlKhWUDyCKbI76dfGyXW9+ulLKyjj8LwMaiq5iq6w3pqlkF12T/b4B9B3FCOW vLxjUlfS9H4si80WA4acwzpe+g0y6ffe7H4nQqcd6bJbQkwzjL3vQH/eNAVFvnEYQCxZ WVS7CubjbQGHWFclZBDfSHl2QOC+u9dC+fM17T6NZnoIIEwOpe6U5eQLGw16hyJY2G/9 LlQAsYIQ5k8g6Ox5Of6lv8LLXmq4ZEqI0Gd8Bs7cy4WYttsYkyIAMyB0tGYoAIMKL0oo 7VYt05ecR7XDHOvXUAaLeKjOBYXl6a3+A73roR84lH/A ----- End Hush Signature v1.3 ----- This message has been signed with a Hush Digital Signature. To verify the signature, please go to www.hush.com/tools Free, encrypted, secure Web-based email at www.hushmail.com