Vulnerability Note VU#953860
Microsoft Windows privilege escalation vulnerability
Microsoft Windows access controls may be improperly configured potentially allowing a local attacker to gain elevated privileges on a vulnerable system.
Microsoft Windows provides numerous, fine grained permissions and privileges to control access to Windows components, such as services, files, and registry entries.
Recent research has uncovered insecure configurations within user accounts and groups on Microsoft Windows systems. These configurations may allow local attackers to gain access to, and manipulate system resources. The researchers have developed a model that analyzes permissions to expose privilege escalation vulnerabilities. The research focused on three particular components of the Windows architecture:
The SERVICE_CHANGE_CONFIG access right allows a user to change the a service's configuration. This includes the executable that services launches and the user account with which a service runs as. According to Microsoft, "Because this grants the caller the right to change the executable file that the system runs, it should be granted only to administrators."
The SERVICE_ALL_ACCESS access right allows a user full control over a service.
The FILE_ALL_ACCESS access right allows a user to completely control a file, including read, write and execute privileges.
The FILE_APPEND_DATA access right allows a user to add data to a file.
The FILE_WRITE_DATA access right allows a user to write and rewrite data to a file.
The WRITE_DAC access right provides the ability to modify the access control list for a resource. Users granted this right have the ability to change the way they, or other users, access a resource. This may allow attackers to grant themselves, or others arbitrary permissions over a resource.
Note that these issues can affect all software that is developed for the Microsoft Windows platform. Known Windows services that have weak permissions include, but may not belimited to
A local user with valid login credentials may be able gain elevated privileges on a vulnerable Windows system.
These issues are corrected in Service Pack 2 for Microsoft Windows XP and Service Pack 1 for Microsoft Windows Server 2003. In addition, Microsoft Security Advisory 914457 and Microsoft Security Bulletin MS06-011 contain numerous workarounds to mitigate these vulnerabilities.
Systems Affected (Learn More)
|Vendor||Status||Date Notified||Date Updated|
|Adobe||Affected||28 Nov 2005||08 Feb 2006|
|Macromedia, Inc.||Affected||29 Nov 2005||08 Feb 2006|
|Microsoft Corporation||Affected||28 Nov 2005||08 Feb 2006|
|Appgate Network Security||Not Affected||14 Dec 2005||09 Feb 2006|
|Fujitsu||Not Affected||14 Dec 2005||21 Apr 2006|
|Oracle Corporation||Not Affected||14 Dec 2005||08 Feb 2006|
|ACROS SI||Unknown||14 Dec 2005||08 Feb 2006|
|Alcatel||Unknown||14 Dec 2005||08 Feb 2006|
|America Online, Inc.||Unknown||28 Nov 2005||08 Feb 2006|
|Apache HTTP Server Project||Unknown||14 Dec 2005||08 Feb 2006|
|Apple Computer, Inc.||Unknown||14 Dec 2005||08 Feb 2006|
|Bitvise||Unknown||14 Dec 2005||08 Feb 2006|
|Check Point Software Technologies||Unknown||14 Dec 2005||08 Feb 2006|
|Cisco Systems, Inc.||Unknown||14 Dec 2005||08 Feb 2006|
|eBay||Unknown||14 Dec 2005||08 Feb 2006|
CVSS Metrics (Learn More)
These vulnerabilities were reported by Sudhakar Govindavajhala and Andrew W. Appel.
This document was written by Jeff Gennari.
- CVE IDs: CVE-2006-0023
- Date Public: 31 Jan 2006
- Date First Published: 07 Feb 2006
- Date Last Updated: 21 Apr 2006
- Severity Metric: 4.22
- Document Revision: 68
If you have feedback, comments, or additional information about this vulnerability, please send us email.