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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.

Home >> Browse Vulnerability Assessment Database >> Denial of Service >> FreeBSD nfsd Malformed NFS Mount Request Denial of Service Vulnerability

Vulnerability Assessment Details

FreeBSD nfsd Malformed NFS Mount Request Denial of Service Vulnerability

Vulnerability Assessment Summary
Tries to crash remote FreeBSD host

Detailed Explanation for this Vulnerability Assessment

Summary :

The remote host is affected by a denial of service vulnerability.

Description :

The NFS server on the remote host appears to be one from FreeBSD that
causes a kernel panic when it receives a malformed NFS mount request
via TCP. An unauthenticated remote attacker can leverage this flaw to
crash the remote host.

See also :

http://lists.immunitysec.com/pipermail/dailydave/2006-February/002982.html
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:10.nfs.asc

Solution :

Use a firewall to restrict access to the NFS server or upgrade / patch
the affected system as described in the vendor advisory above.

Network Security Threat Level:

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

Networks Security ID: 16838

Vulnerability Assessment Copyright: This script is Copyright (C) 2006 Tenable Network Security

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