AIX OpenSSH Advisory : openssh_advisory2.asc

This script is Copyright (C) 2014-2016 Tenable Network Security, Inc.


Synopsis :

The remote AIX host is running a vulnerable version of OpenSSH.

Description :

The version of OpenSSH running on the remote host is affected by a
denial of service vulnerability. The default configuration of OpenSSH
through 6.1 enforces a fixed time limit between establishing a TCP
connection and completing a login, which makes it easier for remote
attackers to cause a denial of service (connection-slot exhaustion)
by periodically making many new TCP connections.

See also :

http://aix.software.ibm.com/aix/efixes/security/openssh_advisory2.asc
https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp

Solution :

A fix is available, and it can be downloaded from the AIX website.

To extract the fixes from the tar file:
zcat OpenSSH_6.0.0.6102.tar.Z | tar xvf -

IMPORTANT: If possible, it is recommended that a mksysb backup of
the system be created. Verify it is both bootable and readable
before proceeding.

To preview the fix installation:
installp -apYd . OpenSSH_6.0.0.6102

To install the fix package:
installp -aXYd . OpenSSH_6.0.0.6102

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 4.3
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: AIX Local Security Checks

Nessus Plugin ID: 73558 ()

Bugtraq ID: 58162

CVE ID: CVE-2010-5107

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