GLSA-200408-04 : PuTTY: Pre-authentication arbitrary code execution

This script is Copyright (C) 2004-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200408-04
(PuTTY: Pre-authentication arbitrary code execution)

PuTTY contains a vulnerability allowing a malicious server to execute
arbitrary code on the connecting client before host key verification.

Impact :

When connecting to a server using the SSH2 protocol an attacker is able
to execute arbitrary code with the permissions of the user running
PuTTY by sending specially crafted packets to the client during the
authentication process but before host key verification.

Workaround :

There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of PuTTY.

See also :

http://www.coresecurity.com/common/showdoc.php?idx=417&idxseccion=10
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
http://www.gentoo.org/security/en/glsa/glsa-200408-04.xml

Solution :

All PuTTY users should upgrade to the latest version:
# emerge sync
# emerge -pv '>=net-misc/putty-0.55'
# emerge '>=net-misc/putty-0.55'

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 14560 (gentoo_GLSA-200408-04.nasl)

Bugtraq ID:

CVE ID: CVE-2004-1440