freeSSHd Key Exchange Algorithm String Remote Overflow

High Nessus Plugin ID 21580


The remote SSH server is prone to a buffer overflow attack.


The remote host is using freeSSHd, a free SSH server for Windows.

The version of freeSSHd installed on the remote host does not validate the key exchange strings sent by a SSH client. This can result in a buffer overflow and possibly a compromise of the host if an unauthenticated attacker sends a long key exchange string.


Upgrade to FreeSSHd version 1.0.10 or later.

Plugin Details

Severity: High

ID: 21580

File Name: freesshd_key_exchange_overflow.nasl

Version: $Revision: 1.17 $

Type: remote

Published: 2006/05/22

Modified: 2011/03/11

Dependencies: 17975

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 6.2

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 2006/05/12

Exploitable With

Metasploit (FreeSSHd 1.0.9 Key Exchange Algorithm String Buffer Overflow)

Reference Information

CVE: CVE-2006-2407

BID: 17958

OSVDB: 25463

Secunia: 19846