Title: Windows 2000 EFS Temporary File Retrieval Vulnerability
Severity: MODERATE
Description:
EFS is the encrypted file system package designed to secure sensitive information. It is included with the Windows 2000 Operating System, distributed and maintained by Microsoft Corporation.
A problem in the package could allow the recovery of sensitive data encrypted by the EFS. When the file is selected for encryption, and backup copy of the file is moved into the temporary directory using the file name efs0.tmp. The data from this file is taken and encrypted using EFS, with the backup file being deleted after the encryption process is performed. However, after the file is encrypted and the file is deleted, the blocks in the file system are never cleared, thus making it possible for a any user on the local host to access the data of the encrypted file, which falls outside of the constrains of access control imposed by the Operating System. This makes it possible for a malicious user to recover sensitive data encrypted by EFS.
Affected Products:
- Avaya DefinityOne Media Servers
- Avaya IP600 Media Servers
- Avaya S3400 Message Application Server
- Avaya S8100 Media Servers
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Advanced Server SP1
- Microsoft Windows 2000 Advanced Server SP2
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows 2000 Datacenter Server SP1
- Microsoft Windows 2000 Datacenter Server SP2
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Professional SP1
- Microsoft Windows 2000 Professional SP2
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Server SP1
- Microsoft Windows 2000 Server SP2
- Microsoft Windows 2000 Terminal Services
- Microsoft Windows 2000 Terminal Services SP1
- Microsoft Windows 2000 Terminal Services SP2
References:
- Colman Communications: Windows 2000 Encrypted File System Weaknesses
- Microsoft: Cipher.exe Security Tool for the Encrypting File System
Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.
