CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
AI Score
Confidence
High
EPSS
Percentile
94.2%
ISC DHCP Client is prone to a buffer overflow vulnerability.
# Copyright (C) 2009 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# 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.
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.900694");
script_version("2022-05-09T13:48:18+0000");
script_tag(name:"last_modification", value:"2022-05-09 13:48:18 +0000 (Mon, 09 May 2022)");
script_tag(name:"creation_date", value:"2009-07-23 21:05:26 +0200 (Thu, 23 Jul 2009)");
script_tag(name:"cvss_base", value:"10.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
script_cve_id("CVE-2009-0692");
script_name("ISC DHCP Client Buffer Overflow Vulnerability");
script_xref(name:"URL", value:"https://www.isc.org/node/468");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/35668");
script_xref(name:"URL", value:"http://secunia.com/advisories/35785");
script_xref(name:"URL", value:"http://www.kb.cert.org/vuls/id/410676");
script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2009/1891");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"executable_version_unreliable");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2009 Greenbone Networks GmbH");
script_family("Buffer overflow");
script_dependencies("secpod_isc_dhcp_client_detect.nasl", "gather-package-list.nasl");
script_mandatory_keys("ISC/DHCP-Client/Ver");
script_tag(name:"impact", value:"Successful exploitation allows attackers to run arbitrary code, corrupt memory,
and can cause denial of service.");
script_tag(name:"affected", value:"ISC DHCP dhclient 4.1 before 4.1.0p1
ISC DHCP dhclient 4.0 before 4.0.1p1
ISC DHCP dhclient 3.1 before 3.1.2p1
ISC DHCP dhclient all versions in 3.0
and 2.0 series.");
script_tag(name:"insight", value:"The flaw is due to a boundary error within the 'script_write_params()'
function in 'client/dhclient.c' which can be exploited to cause a stack-based
buffer overflow by sending an overly long subnet-mask option.");
script_tag(name:"solution", value:"Upgrade to version 4.1.0p1, 4.0.1p1, or 3.1.2p1 or later.");
script_tag(name:"summary", value:"ISC DHCP Client is prone to a buffer overflow vulnerability.");
exit(0);
}
include("version_func.inc");
release = get_kb_item("ssh/login/release");
#RHEL 5 not affected by this vulnerability
if(release && release == "RHENT_5"){
exit(0);
}
dhcpVer = get_kb_item("ISC/DHCP-Client/Ver");
if(!dhcpVer){
exit(0);
}
if(dhcpVer =~ "^4\.1")
{
if(version_is_less(version:dhcpVer, test_version:"4.1.0.p1")){
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
}
else if(dhcpVer =~ "^4\.0")
{
if(version_is_less(version:dhcpVer, test_version:"4.0.1.p1")){
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
}
else if(dhcpVer =~ "^3\.1")
{
if(version_is_less(version:dhcpVer, test_version:"3.1.2.p1")){
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
}
else if((dhcpVer =~ "^3\.0") || (dhcpVer =~ "^2\.0")){
security_message( port: 0, data: "The target host was found to be vulnerable" );
}