FreeBSD nfsd Malformed NFS Mount Request Remote DoS

high Nessus Plugin ID 20989
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The remote host is affected by a denial of service vulnerability.


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.


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

See Also

Plugin Details

Severity: High

ID: 20989

File Name: freebsd_nfsd_dos.nasl

Version: 1.19

Type: remote

Published: 3/1/2006

Updated: 7/11/2018

Dependencies: os_fingerprint.nasl, rpcinfo.nasl

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

Vulnerability Information

CPE: cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*

Required KB Items: Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 2/26/2006

Reference Information

CVE: CVE-2006-0900

BID: 16838