Bugtraq mailing list archives
Re: Disk (over)quota in Windows 2000
From: pgut001 () CS AUCKLAND AC NZ (Peter Gutmann)
Date: Tue, 29 Feb 2000 17:55:40 -0800
Dave Tarbatt - ACS <D.A.Tarbatt () BOLTON AC UK> writes:
I've been looking into disk quotas under Windows 2000 and have uncovered a few anomalies. On top of a few peculiarities there appears to be a bug which allows a user to exceed their disk quota by as much as they wish. [...] I discovered by experiment that new files can be created upto a size of (Quota - UsedSpace + 2KB - 1byte), i.e. they can go overquota by up to 2047 bytes. Not too much of a problem. Extending existing files can be up to (Quota - UsedSpace +1KB -1byte) i.e. up to 1023 bytes overquota - nothing much to be worried about.
Isn't this just a cluster-size filling issue? It looks like accounting is being done on a bytes-used basis but files are managed on a per-cluster basis, so it's possible to extend files out to fill the cluster without coming into conflict with the quota system. Peter.
Current thread:
- Disk (over)quota in Windows 2000 Dave Tarbatt - ACS (Feb 28)
- <Possible follow-ups>
- Re: Disk (over)quota in Windows 2000 Peter Gutmann (Feb 29)