Debian OpenSSH/OpenSSL Package Random Number Generator Weakness

This script is Copyright (C) 2008-2011 Tenable Network Security, Inc.


Synopsis :

The remote SSH host keys are weak.

Description :

The remote SSH host key has been generated on a Debian
or Ubuntu system which contains a bug in the random number
generator of its OpenSSL library.

The problem is due to a Debian packager removing nearly all
sources of entropy in the remote version of OpenSSL.

An attacker can easily obtain the private part of the remote
key and use this to set up decipher the remote session or
set up a man in the middle attack.

See also :

http://www.nessus.org/u?5d01bdab
http://www.nessus.org/u?f14f4224

Solution :

Consider all cryptographic material generated on the remote host
to be guessable. In particuliar, all SSH, SSL and OpenVPN key
material should be re-generated.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 8.3
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Gain a shell remotely

Nessus Plugin ID: 32314 ()

Bugtraq ID: 29179

CVE ID: CVE-2008-0166