Debian OpenSSH/OpenSSL Package Random Number Generator Weakness

Critical Nessus Plugin ID 32314

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.

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.

See Also

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

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

Plugin Details

Severity: Critical

ID: 32314

File Name: ssh_debian_weak.nasl

Version: 1.16

Type: remote

Published: 2008/05/14

Modified: 2017/05/30

Dependencies: 10267

Risk Information

Risk Factor: Critical

CVSSv2

Base Score: 10

Temporal Score: 8.3

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Reference Information

CVE: CVE-2008-0166

BID: 29179

OSVDB: 45029, 45503

CWE: 310