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alex.blackbit
Advocate
Joined: 26 Jul 2005
Posts: 2397
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 Posted: Fri Jan 05, 2007 1:05 am Post subject: ntfs-3g in fstab as user |
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hello everybody!
i used the kernel ntfs driver for a quite long time now to read data from a ntfs partition.
now i would like to use ntfs-3g to have write support.
i can do that, as root, but i would like to as a user like before.
what do i have to do to make that possible?
works: | Code: | ahuemer@xeon ~ % cat /etc/fstab|grep ntfs
/dev/sdf1 /mnt/maxtor ntfs noauto,user,uid=ahuemer,gid=users 0 0
ahuemer@xeon ~ % |
does not work: | Code: | ahuemer@xeon ~ % cat /etc/fstab|grep ntfs
/dev/sdf1 /mnt/maxtor ntfs-3g noauto,user,uid=ahuemer,gid=users 0 0
ahuemer@xeon ~ % mount /mnt/maxtor
Error opening partition device: Permission denied
Failed to startup volume: Permission denied
Failed to mount '/dev/sdf1': Permission denied
ahuemer@xeon ~ % |
thanks for your help
--alex |
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Vicchius
n00b
Joined: 26 Dec 2005
Posts: 12
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| Posted: Wed Jan 31, 2007 9:22 am Post subject: |
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emerge ntfs3g with use flag "suid": any non-root user will be able to mount ntfs partitions but:
| Quote: |
*
* You have chosen to install ntfs3g with the binary setuid root. This
* means that if there any undetected vulnerabilities in the binary,
* then local users may be able to gain root access on your machine.
*
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irgu
Tux's lil' helper
Joined: 25 Apr 2003
Posts: 131
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| Posted: Wed Jan 31, 2007 8:52 pm Post subject: |
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| The vulnerability must be during a very narrow time window because ntfs-3g unrecoverably drops the privilege after successful mount. The user space driver always runs with the user's privilege who mounted the partition. This gives much stronger security compared to in-kernel filesytems because a security compromise is not system-wide typically. See e.g. http://projects.info-pull.com/mokb/ |
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