Microsoft Windows 2000 Local Security Policy Corruption Vulnerability
BID:1613
Info
Microsoft Windows 2000 Local Security Policy Corruption Vulnerability
| Bugtraq ID: | 1613 |
| Class: | Failure to Handle Exceptional Conditions |
| CVE: | |
| Remote: | Yes |
| Local: | Yes |
| Published: | Aug 28 2000 12:00AM |
| Updated: | Aug 28 2000 12:00AM |
| Credit: | Discovered by an internal Microsoft security team and publicized in a Microsoft Security Bulletin (MS00-062) on August 28, 2000. |
| Vulnerable: |
Microsoft Windows 2000 Server Microsoft Windows 2000 Professional Microsoft Windows 2000 Advanced Server |
| Not Vulnerable: |
Microsoft Windows 2000 Server SP1 Microsoft Windows 2000 Professional SP1 Microsoft Windows 2000 Advanced Server SP1 |
Discussion
Microsoft Windows 2000 Local Security Policy Corruption Vulnerability
It is possible for a malicious user, to corrupt the Local Security Policy of a Windows 2000 machine which would effectively deny network services. The Local Security Policy identifies:
- the domains trusted to authenticate logon attempts.
- who may access the system and how (interactively, network, as a service).
- who is assigned privileges.
- what security auditing is to be performed.
- the establishment of default memory quotas. This controls how much paged and non-paged pool an individual may use.
If the LSP was successfully corrupted on a Windows 2000 client, a user would not be able to log onto the domain, download files from the server, share files, and so forth. If the the LSP was successfully corrupted on a domain controller, network services would be eliminated throughout the entire domain. In the case that a LSP is corrupted, restoring a well known configuration from backup would be the only solution.
It is not required to be an authenticated user in order to mount an attack. Any remote or local user who can establish a RPC connection and follow a series of specific steps can exploit this vulnerability.
It is possible for a malicious user, to corrupt the Local Security Policy of a Windows 2000 machine which would effectively deny network services. The Local Security Policy identifies:
- the domains trusted to authenticate logon attempts.
- who may access the system and how (interactively, network, as a service).
- who is assigned privileges.
- what security auditing is to be performed.
- the establishment of default memory quotas. This controls how much paged and non-paged pool an individual may use.
If the LSP was successfully corrupted on a Windows 2000 client, a user would not be able to log onto the domain, download files from the server, share files, and so forth. If the the LSP was successfully corrupted on a domain controller, network services would be eliminated throughout the entire domain. In the case that a LSP is corrupted, restoring a well known configuration from backup would be the only solution.
It is not required to be an authenticated user in order to mount an attack. Any remote or local user who can establish a RPC connection and follow a series of specific steps can exploit this vulnerability.
Exploit / POC
Microsoft Windows 2000 Local Security Policy Corruption Vulnerability
Currently the SecurityFocus staff are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].
Currently the SecurityFocus staff are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].
Solution / Fix
Microsoft Windows 2000 Local Security Policy Corruption Vulnerability
Solution:
Users who have already applied Windows 2000 Service Pack 1 are not affected by this vulnerability. It is available for download at the following location:
http://www.microsoft.com/windows2000/downloads/recommended/sp1/x86Lang.asp
Microsoft has also made a patch available that eliminates this vulnerability for those that cannot deploy Windows 2000 Service Pack 1:
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Server
Solution:
Users who have already applied Windows 2000 Service Pack 1 are not affected by this vulnerability. It is available for download at the following location:
http://www.microsoft.com/windows2000/downloads/recommended/sp1/x86Lang.asp
Microsoft has also made a patch available that eliminates this vulnerability for those that cannot deploy Windows 2000 Service Pack 1:
Microsoft Windows 2000 Professional
-
Microsoft Q269609
http://www.microsoft.com/Downloads/Release.asp?ReleaseID=24019
Microsoft Windows 2000 Advanced Server
-
Microsoft Q269609
http://www.microsoft.com/Downloads/Release.asp?ReleaseID=24019
Microsoft Windows 2000 Server
-
Microsoft Q269609
http://www.microsoft.com/Downloads/Release.asp?ReleaseID=24019
References
Microsoft Windows 2000 Local Security Policy Corruption Vulnerability
References:
References: