Linux 2.4 NFSv3 knfsd Malformed GETATTR Request Remote DoS

This script is Copyright (C) 2003-2014 Tenable Network Security, Inc.


Synopsis :

The remote NFS daemon is prone to a denial of service attack.

Description :

The remote host is running knfsd, a kernel NFS daemon.

There is a vulnerability in this version that may allow an attacker to
cause a kernel panic on the remote host by sending a malformed GETATTR
request with an invalid length field.

See also :

http://archives.neohapsis.com/archives/bugtraq/2003-07/0379.html

Solution :

Upgrade to Linux kernel version 2.4.21 (or later) as the issue
reportedly has been silently patched in that version.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 6.4
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Denial of Service

Nessus Plugin ID: 11813 (knfs_dos.nasl)

Bugtraq ID: 8298

CVE ID: CVE-2003-0619