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

high Nessus Plugin ID 14560

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.

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'

See Also

https://www.secureauth.com/?idx=417&idxseccion=10

https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html

https://security.gentoo.org/glsa/200408-04

Plugin Details

Severity: High

ID: 14560

File Name: gentoo_GLSA-200408-04.nasl

Version: 1.18

Type: local

Published: 8/30/2004

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:putty, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 8/5/2004

Reference Information

CVE: CVE-2004-1440

GLSA: 200408-04