This host is installed with UltraVNC VNCViewer and is prone to
Buffer Overflow Vulnerability.
###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_ultravnc_cpp_file_mult_bof_vuln.nasl 5370 2017-02-20 15:24:26Z cfi $
#
# UltraVNC VNCViewer Multiple Buffer Overflow Vulnerabilities - Nov08
#
# Authors:
# Veerendra GG <[email protected]>
#
# Copyright:
# Copyright (c) 2008 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################
tag_impact = "Successful exploitation allows attackers to execute arbitrary code
by tricking a user into connecting to a malicious VNC server or by sending
specially crafted data to a vncviewer in LISTENING mode and can even cause
denial of service condition.
Impact Level: Application";
tag_affected = "UltraVNC VNCViewer Version 1.0.2 and 1.0.4 before RC11 on Windows (Any).";
tag_insight = "The flaw is due to multiple boundary errors within the
vncviewer/FileTransfer.cpp file, while processing malformed data.";
tag_solution = "Upgrade to latest Version or
Apply the available patch from below link,
http://downloads.sourceforge.net/ultravnc/UltraVNC-Viewer-104-Security-Update-2---Feb-8-2008.zip";
tag_summary = "This host is installed with UltraVNC VNCViewer and is prone to
Buffer Overflow Vulnerability.";
if(description)
{
script_xref(name : "URL" , value : "http://secunia.com/advisories/28804");
script_xref(name : "URL" , value : "http://forum.ultravnc.info/viewtopic.php?p=45150");
script_xref(name : "URL" , value : "http://www.frsirt.com/english/advisories/2008/0486/products");
script_xref(name : "URL" , value : "http://sourceforge.net/project/shownotes.php?release_id=571174;group_id=63887");
script_id(800131);
script_version("$Revision: 5370 $");
script_tag(name:"last_modification", value:"$Date: 2017-02-20 16:24:26 +0100 (Mon, 20 Feb 2017) $");
script_tag(name:"creation_date", value:"2008-11-14 10:43:16 +0100 (Fri, 14 Nov 2008)");
script_tag(name:"cvss_base", value:"9.3");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_cve_id("CVE-2008-5001");
script_bugtraq_id(27687);
script_name("UltraVNC VNCViewer Multiple Buffer Overflow Vulnerabilities - Nov08");
script_category(ACT_GATHER_INFO);
script_tag(name:"qod_type", value:"executable_version");
script_copyright("Copyright (C) 2008 Greenbone Networks GmbH");
script_family("Denial of Service");
script_dependencies("secpod_reg_enum.nasl");
script_mandatory_keys("SMB/WindowsVersion");
script_require_ports(139, 445);
script_tag(name : "impact" , value : tag_impact);
script_tag(name : "affected" , value : tag_affected);
script_tag(name : "insight" , value : tag_insight);
script_tag(name : "solution" , value : tag_solution);
script_tag(name : "summary" , value : tag_summary);
exit(0);
}
include("smb_nt.inc");
include("secpod_smb_func.inc");
if(!get_kb_item("SMB/WindowsVersion")){
exit(0);
}
key = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\";
if(!registry_key_exists(key:key)){
exit(0);
}
foreach item (registry_enum_keys(key:key))
{
vncName = registry_get_sz(item:"DisplayName", key:key +item);
if("UltraVNC" >!< vncName){
continue;
}
vncComp = registry_get_sz(item:"Inno Setup: Selected Components",
key:key + item);
if("viewer" >< vncComp)
{
vncPath = registry_get_sz(item:"InstallLocation", key:key +item);
if(!vncPath){
exit(0);
}
vncPath += "vncviewer.exe";
share = ereg_replace(pattern:"([A-Z]):.*", replace:"\1$", string:vncPath);
file = ereg_replace(pattern:"[A-Z]:(.*)", replace:"\1", string:vncPath);
vncVer = GetVer(file:file, share:share);
if(!vncVer){
exit(0);
}
if(vncVer == "1.1.0.2"){
security_message(0);
}
else if ("1.0.4" >< vncVer)
{
report = string("NOTE: Ignore this report if above " +
"mentioned patch is already applied.\n ***** \n");
security_message(data:report);
}
exit(0);
}
}