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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.

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Vulnerability Assessment Details

User Mountable NFS shares

Vulnerability Assessment Summary
Checks for User Mountable NFS

Detailed Explanation for this Vulnerability Assessment

Summary :

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

Description :

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

Note that root rights 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.

Network Security Threat Level:

Medium / CVSS Base Score : 5
(AV:R/AC:L/Au:NR/C:P/A:N/I:P/B:C)

Networks Security ID:

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

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