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User Mountable NFS shares

Article ID: 15984
Last updated: 27 Jan, 2009
Views: 924
Posted: 22 Jan, 2009
by: Tech Pubs S.
Updated: 27 Jan, 2009
by: Tech Pubs S.

User Mountable NFS shares

This script is Copyright (C) 2003 Renaud Deraison, modified 2004 Michael Stone

FamilyRemote file access
Plugin ID15984
Bugtraq ID
CVE ID

Description:

Synopsis :

It is possible to access the remote NFS shares without having root privileges.

Description :

Some of the NFS shares exported by the remote server could be
mounted by the scanning host. An attacker may exploit this problem
to gain read (and possibly write) access to files on remote host.

Note that root privileges were not required to mount the remote shares. That is,
the source port to mount the shares was bigger than 1024.

Solution :

Configure NFS on the remote host so that only authorized hosts can mount
the remote shares.

The remote NFS server should prevent mount requests originating from a non-privileged port.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
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