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This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.CISCO-SA-20170322-DHCPC-IOS.NASLHistoryMar 28, 2017 - 12:00 a.m.
Cisco IOS DHCP Client DoS (cisco-sa-20170322-dhcpc)
2017-03-2800:00:00
This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
51
CVSS2
7.8
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS
0.002
Percentile
62.0%
According to its self-reported version, the Cisco IOS software running on the remote device is affected by a denial of service vulnerability in the DHCP client implementation when parsing DHCP packets. An unauthenticated, remote attacker can exploit this issue, via specially crafted DHCP packets, to cause the device to reload.
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(99026);
script_version("1.10");
script_cvs_date("Date: 2019/11/13");
script_cve_id("CVE-2017-3864");
script_bugtraq_id(97012);
script_xref(name:"CISCO-BUG-ID", value:"CSCuu43892");
script_xref(name:"CISCO-SA", value:"cisco-sa-20170322-dhcpc");
script_name(english:"Cisco IOS DHCP Client DoS (cisco-sa-20170322-dhcpc)");
script_summary(english:"Checks the IOS version.");
script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Cisco IOS software running
on the remote device is affected by a denial of service vulnerability
in the DHCP client implementation when parsing DHCP packets. An
unauthenticated, remote attacker can exploit this issue, via specially
crafted DHCP packets, to cause the device to reload.");
# https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-dhcpc
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0d54a2ce");
script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuu43892");
script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID
CSCuu43892.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/03/22");
script_set_attribute(attribute:"patch_publication_date", value:"2017/03/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/28");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CISCO");
script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("cisco_ios_version.nasl");
script_require_keys("Host/Cisco/IOS/Version");
exit(0);
}
include("audit.inc");
include("cisco_func.inc");
include("cisco_kb_cmd_func.inc");
flag = 0;
override = 0;
ver = get_kb_item_or_exit("Host/Cisco/IOS/Version");
# Check for vuln versions
if (
ver == '12.2(33)MRA' ||
ver == '12.2(33)MRB' ||
ver == '12.2(33)MRB1' ||
ver == '12.2(33)MRB2' ||
ver == '12.2(33)MRB3' ||
ver == '12.2(33)MRB4' ||
ver == '12.2(33)MRB5' ||
ver == '12.2(33)MRB6' ||
ver == '12.2(33)SRD' ||
ver == '12.2(33)SRD1' ||
ver == '12.2(33)SRD2' ||
ver == '12.2(33)SRD2a' ||
ver == '12.2(33)SRD3' ||
ver == '12.2(33)SRD4' ||
ver == '12.2(33)SRD5' ||
ver == '12.2(33)SRD6' ||
ver == '12.2(33)SRD7' ||
ver == '12.2(33)SRD8' ||
ver == '12.2(33)SRE' ||
ver == '12.2(33)SRE0a' ||
ver == '12.2(33)SRE1' ||
ver == '12.2(33)SRE2' ||
ver == '12.2(33)SXH5' ||
ver == '12.2(33)SXH6' ||
ver == '12.2(33)SXH7' ||
ver == '12.2(33)SXH8' ||
ver == '12.2(33)SXH8a' ||
ver == '12.2(33)SXH8b' ||
ver == '12.2(33)SXI' ||
ver == '12.2(33)SXI1' ||
ver == '12.2(33)SXI10' ||
ver == '12.2(33)SXI11' ||
ver == '12.2(33)SXI12' ||
ver == '12.2(33)SXI13' ||
ver == '12.2(33)SXI14' ||
ver == '12.2(33)SXI2' ||
ver == '12.2(33)SXI2a' ||
ver == '12.2(33)SXI3' ||
ver == '12.2(33)SXI4' ||
ver == '12.2(33)SXI4a' ||
ver == '12.2(33)SXI5' ||
ver == '12.2(33)SXI6' ||
ver == '12.2(33)SXI7' ||
ver == '12.2(33)SXI8' ||
ver == '12.2(33)SXI8a' ||
ver == '12.2(33)SXI9' ||
ver == '12.2(33)SXJ' ||
ver == '12.2(33)SXJ1' ||
ver == '12.2(33)SXJ10' ||
ver == '12.2(33)SXJ2' ||
ver == '12.2(33)SXJ3' ||
ver == '12.2(33)SXJ4' ||
ver == '12.2(33)SXJ5' ||
ver == '12.2(33)SXJ6' ||
ver == '12.2(33)SXJ7' ||
ver == '12.2(33)SXJ8' ||
ver == '12.2(33)SXJ9' ||
ver == '12.2(50)SY' ||
ver == '12.2(50)SY1' ||
ver == '12.2(50)SY2' ||
ver == '12.2(50)SY3' ||
ver == '12.2(50)SY4' ||
ver == '12.4(15)T10' ||
ver == '12.4(15)T11' ||
ver == '12.4(15)T12' ||
ver == '12.4(15)T13' ||
ver == '12.4(15)T14' ||
ver == '12.4(15)T15' ||
ver == '12.4(15)T16' ||
ver == '12.4(15)T17' ||
ver == '12.4(15)T9' ||
ver == '12.4(15)XZ' ||
ver == '12.4(15)XZ1' ||
ver == '12.4(15)XZ2' ||
ver == '12.4(19)MR' ||
ver == '12.4(19)MR1' ||
ver == '12.4(19)MR2' ||
ver == '12.4(19)MR3' ||
ver == '12.4(20)MR' ||
ver == '12.4(20)MR2' ||
ver == '12.4(20)MRB' ||
ver == '12.4(20)MRB1' ||
ver == '12.4(20)T' ||
ver == '12.4(20)T1' ||
ver == '12.4(20)T2' ||
ver == '12.4(20)T3' ||
ver == '12.4(20)T4' ||
ver == '12.4(20)T5' ||
ver == '12.4(20)T6' ||
ver == '12.4(20)YA' ||
ver == '12.4(20)YA1' ||
ver == '12.4(20)YA2' ||
ver == '12.4(20)YA3' ||
ver == '12.4(21)' ||
ver == '12.4(21a)' ||
ver == '12.4(21a)JA' ||
ver == '12.4(21a)JA1' ||
ver == '12.4(21a)JA2' ||
ver == '12.4(21a)JHA' ||
ver == '12.4(21a)JHC' ||
ver == '12.4(21a)JX' ||
ver == '12.4(21a)JY' ||
ver == '12.4(22)GC1' ||
ver == '12.4(22)MD' ||
ver == '12.4(22)MD1' ||
ver == '12.4(22)MD2' ||
ver == '12.4(22)MDA' ||
ver == '12.4(22)MDA1' ||
ver == '12.4(22)MDA2' ||
ver == '12.4(22)MDA3' ||
ver == '12.4(22)MDA4' ||
ver == '12.4(22)MDA5' ||
ver == '12.4(22)MDA6' ||
ver == '12.4(22)T' ||
ver == '12.4(22)T1' ||
ver == '12.4(22)T2' ||
ver == '12.4(22)T3' ||
ver == '12.4(22)T4' ||
ver == '12.4(22)T5' ||
ver == '12.4(22)XR1' ||
ver == '12.4(22)XR10' ||
ver == '12.4(22)XR11' ||
ver == '12.4(22)XR12' ||
ver == '12.4(22)XR2' ||
ver == '12.4(22)XR3' ||
ver == '12.4(22)XR4' ||
ver == '12.4(22)XR5' ||
ver == '12.4(22)XR6' ||
ver == '12.4(22)XR7' ||
ver == '12.4(22)XR8' ||
ver == '12.4(22)XR9' ||
ver == '12.4(22)YB' ||
ver == '12.4(22)YB1' ||
ver == '12.4(22)YB2' ||
ver == '12.4(22)YB3' ||
ver == '12.4(22)YB4' ||
ver == '12.4(22)YB5' ||
ver == '12.4(22)YB6' ||
ver == '12.4(22)YB7' ||
ver == '12.4(22)YB8' ||
ver == '12.4(22)YD' ||
ver == '12.4(22)YD1' ||
ver == '12.4(22)YD2' ||
ver == '12.4(22)YD3' ||
ver == '12.4(22)YD4' ||
ver == '12.4(22)YE' ||
ver == '12.4(22)YE1' ||
ver == '12.4(22)YE2' ||
ver == '12.4(22)YE3' ||
ver == '12.4(22)YE4' ||
ver == '12.4(22)YE5' ||
ver == '12.4(22)YE6' ||
ver == '12.4(23)' ||
ver == '12.4(23a)' ||
ver == '12.4(23b)' ||
ver == '12.4(23c)JA' ||
ver == '12.4(23c)JA1' ||
ver == '12.4(23c)JA10' ||
ver == '12.4(23c)JA2' ||
ver == '12.4(23c)JA3' ||
ver == '12.4(23c)JA4' ||
ver == '12.4(23c)JA5' ||
ver == '12.4(23c)JA6' ||
ver == '12.4(23c)JA7' ||
ver == '12.4(23c)JA8' ||
ver == '12.4(23c)JA9' ||
ver == '12.4(23c)JY' ||
ver == '12.4(23c)JZ' ||
ver == '12.4(24)GC1' ||
ver == '12.4(24)GC3' ||
ver == '12.4(24)GC3a' ||
ver == '12.4(24)GC4' ||
ver == '12.4(24)GC5' ||
ver == '12.4(24)MD' ||
ver == '12.4(24)MD1' ||
ver == '12.4(24)MD2' ||
ver == '12.4(24)MD3' ||
ver == '12.4(24)MD4' ||
ver == '12.4(24)MD5' ||
ver == '12.4(24)MD6' ||
ver == '12.4(24)MD7' ||
ver == '12.4(24)MDA1' ||
ver == '12.4(24)MDA10' ||
ver == '12.4(24)MDA11' ||
ver == '12.4(24)MDA12' ||
ver == '12.4(24)MDA13' ||
ver == '12.4(24)MDA2' ||
ver == '12.4(24)MDA3' ||
ver == '12.4(24)MDA4' ||
ver == '12.4(24)MDA5' ||
ver == '12.4(24)MDA6' ||
ver == '12.4(24)MDA7' ||
ver == '12.4(24)MDA8' ||
ver == '12.4(24)MDA9' ||
ver == '12.4(24)MDB' ||
ver == '12.4(24)MDB1' ||
ver == '12.4(24)MDB10' ||
ver == '12.4(24)MDB11' ||
ver == '12.4(24)MDB12' ||
ver == '12.4(24)MDB13' ||
ver == '12.4(24)MDB14' ||
ver == '12.4(24)MDB15' ||
ver == '12.4(24)MDB16' ||
ver == '12.4(24)MDB17' ||
ver == '12.4(24)MDB18' ||
ver == '12.4(24)MDB19' ||
ver == '12.4(24)MDB3' ||
ver == '12.4(24)MDB4' ||
ver == '12.4(24)MDB5' ||
ver == '12.4(24)MDB5a' ||
ver == '12.4(24)MDB6' ||
ver == '12.4(24)MDB7' ||
ver == '12.4(24)MDB8' ||
ver == '12.4(24)MDB9' ||
ver == '12.4(24)T' ||
ver == '12.4(24)T1' ||
ver == '12.4(24)T2' ||
ver == '12.4(24)T3' ||
ver == '12.4(24)T3e' ||
ver == '12.4(24)T3f' ||
ver == '12.4(24)T4' ||
ver == '12.4(24)T4a' ||
ver == '12.4(24)T4b' ||
ver == '12.4(24)T4c' ||
ver == '12.4(24)T4d' ||
ver == '12.4(24)T4e' ||
ver == '12.4(24)T4f' ||
ver == '12.4(24)T4l' ||
ver == '12.4(24)T5' ||
ver == '12.4(24)T6' ||
ver == '12.4(24)T7' ||
ver == '12.4(24)T8' ||
ver == '12.4(24)YE' ||
ver == '12.4(24)YE1' ||
ver == '12.4(24)YE2' ||
ver == '12.4(24)YE3' ||
ver == '12.4(24)YE3a' ||
ver == '12.4(24)YE3b' ||
ver == '12.4(24)YE3c' ||
ver == '12.4(24)YE3d' ||
ver == '12.4(24)YE3e' ||
ver == '12.4(24)YE4' ||
ver == '12.4(24)YE5' ||
ver == '12.4(24)YE6' ||
ver == '12.4(24)YE7' ||
ver == '12.4(24)YG1' ||
ver == '12.4(24)YG2' ||
ver == '12.4(24)YG3' ||
ver == '12.4(24)YG4' ||
ver == '12.4(25)' ||
ver == '12.4(25a)' ||
ver == '12.4(25b)' ||
ver == '12.4(25c)' ||
ver == '12.4(25d)' ||
ver == '12.4(25d)JA' ||
ver == '12.4(25d)JA1' ||
ver == '12.4(25d)JA2' ||
ver == '12.4(25d)JAX' ||
ver == '12.4(25d)JAX1' ||
ver == '12.4(25e)' ||
ver == '12.4(25e)JA' ||
ver == '12.4(25e)JA1' ||
ver == '12.4(25e)JAL' ||
ver == '12.4(25e)JAL1' ||
ver == '12.4(25e)JAL1a' ||
ver == '12.4(25e)JAL2' ||
ver == '12.4(25e)JAM' ||
ver == '12.4(25e)JAM2' ||
ver == '12.4(25e)JAM3' ||
ver == '12.4(25e)JAM4' ||
ver == '12.4(25e)JAM5' ||
ver == '12.4(25e)JAM6' ||
ver == '12.4(25e)JAN1' ||
ver == '12.4(25e)JAO' ||
ver == '12.4(25e)JAO1' ||
ver == '12.4(25e)JAO2' ||
ver == '12.4(25e)JAO3' ||
ver == '12.4(25e)JAO4' ||
ver == '12.4(25e)JAO5' ||
ver == '12.4(25e)JAO6' ||
ver == '12.4(25e)JAP' ||
ver == '12.4(25e)JAP1' ||
ver == '12.4(25e)JAP10' ||
ver == '12.4(25e)JAP100' ||
ver == '12.4(25e)JAP26' ||
ver == '12.4(25e)JAP4' ||
ver == '12.4(25e)JAP5' ||
ver == '12.4(25e)JAP6' ||
ver == '12.4(25e)JAP7' ||
ver == '12.4(25e)JAP8' ||
ver == '12.4(25e)JAP9' ||
ver == '12.4(25e)JAX' ||
ver == '12.4(25e)JAX1' ||
ver == '12.4(25e)JAX2' ||
ver == '12.4(25e)JAZ' ||
ver == '12.4(25e)JX' ||
ver == '12.4(25f)' ||
ver == '12.4(25g)' ||
ver == '15.0(1)M' ||
ver == '15.0(1)M1' ||
ver == '15.0(1)M10' ||
ver == '15.0(1)M2' ||
ver == '15.0(1)M3' ||
ver == '15.0(1)M4' ||
ver == '15.0(1)M5' ||
ver == '15.0(1)M6' ||
ver == '15.0(1)M7' ||
ver == '15.0(1)M8' ||
ver == '15.0(1)M9' ||
ver == '15.0(1)SY' ||
ver == '15.0(1)SY1' ||
ver == '15.0(1)SY10' ||
ver == '15.0(1)SY2' ||
ver == '15.0(1)SY3' ||
ver == '15.0(1)SY4' ||
ver == '15.0(1)SY5' ||
ver == '15.0(1)SY6' ||
ver == '15.0(1)SY7' ||
ver == '15.0(1)SY7a' ||
ver == '15.0(1)SY8' ||
ver == '15.0(1)SY9' ||
ver == '15.0(1)XA' ||
ver == '15.0(1)XA1' ||
ver == '15.0(1)XA2' ||
ver == '15.0(1)XA3' ||
ver == '15.0(1)XA4' ||
ver == '15.0(1)XA5' ||
ver == '15.0(2)EJ' ||
ver == '15.0(2)EJ1' ||
ver == '15.0(2)SE10' ||
ver == '15.0(2)SE3' ||
ver == '15.0(2)SE4' ||
ver == '15.0(2)SE5' ||
ver == '15.0(2)SE6' ||
ver == '15.0(2)SE7' ||
ver == '15.0(2)SE8' ||
ver == '15.0(2)SE9' ||
ver == '15.0(2a)SE9' ||
ver == '15.1(1)SY' ||
ver == '15.1(1)SY1' ||
ver == '15.1(1)SY2' ||
ver == '15.1(1)SY3' ||
ver == '15.1(1)SY4' ||
ver == '15.1(1)SY5' ||
ver == '15.1(1)SY6' ||
ver == '15.1(1)T' ||
ver == '15.1(1)T1' ||
ver == '15.1(1)T2' ||
ver == '15.1(1)T3' ||
ver == '15.1(1)T4' ||
ver == '15.1(1)T5' ||
ver == '15.1(1)XB' ||
ver == '15.1(2)GC' ||
ver == '15.1(2)GC1' ||
ver == '15.1(2)GC2' ||
ver == '15.1(2)SY' ||
ver == '15.1(2)SY1' ||
ver == '15.1(2)SY2' ||
ver == '15.1(2)SY3' ||
ver == '15.1(2)SY4' ||
ver == '15.1(2)SY4a' ||
ver == '15.1(2)SY5' ||
ver == '15.1(2)SY6' ||
ver == '15.1(2)SY7' ||
ver == '15.1(2)T' ||
ver == '15.1(2)T0a' ||
ver == '15.1(2)T1' ||
ver == '15.1(2)T2' ||
ver == '15.1(2)T2a' ||
ver == '15.1(2)T3' ||
ver == '15.1(2)T4' ||
ver == '15.1(2)T5' ||
ver == '15.1(3)T' ||
ver == '15.1(3)T1' ||
ver == '15.1(3)T2' ||
ver == '15.1(3)T3' ||
ver == '15.1(3)T4' ||
ver == '15.1(4)GC' ||
ver == '15.1(4)GC1' ||
ver == '15.1(4)GC2' ||
ver == '15.1(4)M' ||
ver == '15.1(4)M1' ||
ver == '15.1(4)M10' ||
ver == '15.1(4)M2' ||
ver == '15.1(4)M3' ||
ver == '15.1(4)M3a' ||
ver == '15.1(4)M4' ||
ver == '15.1(4)M5' ||
ver == '15.1(4)M6' ||
ver == '15.1(4)M7' ||
ver == '15.1(4)M8' ||
ver == '15.1(4)M9' ||
ver == '15.2(1)E' ||
ver == '15.2(1)E1' ||
ver == '15.2(1)E2' ||
ver == '15.2(1)E3' ||
ver == '15.2(1)EY' ||
ver == '15.2(1)GC' ||
ver == '15.2(1)GC1' ||
ver == '15.2(1)GC2' ||
ver == '15.2(1)SY' ||
ver == '15.2(1)SY0a' ||
ver == '15.2(1)SY1' ||
ver == '15.2(1)SY1a' ||
ver == '15.2(1)SY2' ||
ver == '15.2(1)T' ||
ver == '15.2(1)T1' ||
ver == '15.2(1)T2' ||
ver == '15.2(1)T3' ||
ver == '15.2(1)T3a' ||
ver == '15.2(1)T4' ||
ver == '15.2(2)E' ||
ver == '15.2(2)E1' ||
ver == '15.2(2)E2' ||
ver == '15.2(2)E4' ||
ver == '15.2(2)EB' ||
ver == '15.2(2)EB1' ||
ver == '15.2(2)EB2' ||
ver == '15.2(2)GC' ||
ver == '15.2(2)JA' ||
ver == '15.2(2)JA1' ||
ver == '15.2(2)JAX' ||
ver == '15.2(2)JAX1' ||
ver == '15.2(2)JB' ||
ver == '15.2(2)JB2' ||
ver == '15.2(2)JB3' ||
ver == '15.2(2)JB4' ||
ver == '15.2(2)JB5' ||
ver == '15.2(2)JB6' ||
ver == '15.2(2)SY' ||
ver == '15.2(2)SY1' ||
ver == '15.2(2)T' ||
ver == '15.2(2)T1' ||
ver == '15.2(2)T2' ||
ver == '15.2(2)T3' ||
ver == '15.2(2)T4' ||
ver == '15.2(2a)E1' ||
ver == '15.2(3)E' ||
ver == '15.2(3)E1' ||
ver == '15.2(3)E2' ||
ver == '15.2(3)E3' ||
ver == '15.2(3)GC' ||
ver == '15.2(3)GC1' ||
ver == '15.2(3)T' ||
ver == '15.2(3)T1' ||
ver == '15.2(3)T2' ||
ver == '15.2(3)T3' ||
ver == '15.2(3)T4' ||
ver == '15.2(3a)E' ||
ver == '15.2(3m)E2' ||
ver == '15.2(4)GC' ||
ver == '15.2(4)GC1' ||
ver == '15.2(4)GC2' ||
ver == '15.2(4)GC3' ||
ver == '15.2(4)JA' ||
ver == '15.2(4)JA1' ||
ver == '15.2(4)JB' ||
ver == '15.2(4)JB1' ||
ver == '15.2(4)JB2' ||
ver == '15.2(4)JB3' ||
ver == '15.2(4)JB3a' ||
ver == '15.2(4)JB3b' ||
ver == '15.2(4)JB3h' ||
ver == '15.2(4)JB3s' ||
ver == '15.2(4)JB4' ||
ver == '15.2(4)JB5' ||
ver == '15.2(4)JB5h' ||
ver == '15.2(4)JB5m' ||
ver == '15.2(4)JB6' ||
ver == '15.2(4)JN' ||
ver == '15.2(4)M' ||
ver == '15.2(4)M1' ||
ver == '15.2(4)M10' ||
ver == '15.2(4)M11' ||
ver == '15.2(4)M2' ||
ver == '15.2(4)M3' ||
ver == '15.2(4)M4' ||
ver == '15.2(4)M5' ||
ver == '15.2(4)M6' ||
ver == '15.2(4)M6a' ||
ver == '15.2(4)M7' ||
ver == '15.2(4)M8' ||
ver == '15.2(4)M9' ||
ver == '15.3(1)SY' ||
ver == '15.3(1)T' ||
ver == '15.3(1)T1' ||
ver == '15.3(1)T2' ||
ver == '15.3(1)T3' ||
ver == '15.3(1)T4' ||
ver == '15.3(2)T' ||
ver == '15.3(2)T1' ||
ver == '15.3(2)T2' ||
ver == '15.3(2)T3' ||
ver == '15.3(2)T4' ||
ver == '15.3(3)JA' ||
ver == '15.3(3)JA1' ||
ver == '15.3(3)JA10' ||
ver == '15.3(3)JA1m' ||
ver == '15.3(3)JA1n' ||
ver == '15.3(3)JA4' ||
ver == '15.3(3)JA5' ||
ver == '15.3(3)JA6' ||
ver == '15.3(3)JA7' ||
ver == '15.3(3)JA76' ||
ver == '15.3(3)JA77' ||
ver == '15.3(3)JA78' ||
ver == '15.3(3)JA8' ||
ver == '15.3(3)JA9' ||
ver == '15.3(3)JAA' ||
ver == '15.3(3)JAB' ||
ver == '15.3(3)JAX' ||
ver == '15.3(3)JAX1' ||
ver == '15.3(3)JAX2' ||
ver == '15.3(3)JB' ||
ver == '15.3(3)JB75' ||
ver == '15.3(3)JBB' ||
ver == '15.3(3)JBB1' ||
ver == '15.3(3)JBB2' ||
ver == '15.3(3)JBB4' ||
ver == '15.3(3)JBB5' ||
ver == '15.3(3)JBB6' ||
ver == '15.3(3)JBB8' ||
ver == '15.3(3)JC' ||
ver == '15.3(3)JC1' ||
ver == '15.3(3)JC2' ||
ver == '15.3(3)JC3' ||
ver == '15.3(3)JC4' ||
ver == '15.3(3)JD' ||
ver == '15.3(3)JN3' ||
ver == '15.3(3)JN4' ||
ver == '15.3(3)JN7' ||
ver == '15.3(3)JN8' ||
ver == '15.3(3)JN9' ||
ver == '15.3(3)JNB' ||
ver == '15.3(3)JNB1' ||
ver == '15.3(3)JNB2' ||
ver == '15.3(3)JNB3' ||
ver == '15.3(3)JNB4' ||
ver == '15.3(3)JNC' ||
ver == '15.3(3)JNC1' ||
ver == '15.3(3)JNC2' ||
ver == '15.3(3)JNC3' ||
ver == '15.3(3)JND' ||
ver == '15.3(3)JNP' ||
ver == '15.3(3)JNP1' ||
ver == '15.3(3)JNP2' ||
ver == '15.3(3)JNP3' ||
ver == '15.3(3)JPB' ||
ver == '15.3(3)JPB1' ||
ver == '15.3(3)JPB2' ||
ver == '15.3(3)JPC' ||
ver == '15.3(3)JPC1' ||
ver == '15.3(3)JPC2' ||
ver == '15.3(3)M' ||
ver == '15.3(3)M1' ||
ver == '15.3(3)M2' ||
ver == '15.3(3)M3' ||
ver == '15.3(3)M4' ||
ver == '15.3(3)M5' ||
ver == '15.3(3)M6' ||
ver == '15.3(3)M7' ||
ver == '15.3(3)M8' ||
ver == '15.4(1)CG' ||
ver == '15.4(1)CG1' ||
ver == '15.4(1)T' ||
ver == '15.4(1)T1' ||
ver == '15.4(1)T2' ||
ver == '15.4(1)T3' ||
ver == '15.4(1)T4' ||
ver == '15.4(2)CG' ||
ver == '15.4(2)T' ||
ver == '15.4(2)T1' ||
ver == '15.4(2)T2' ||
ver == '15.4(2)T3' ||
ver == '15.4(2)T4' ||
ver == '15.4(3)M' ||
ver == '15.4(3)M1' ||
ver == '15.4(3)M2' ||
ver == '15.4(3)M3' ||
ver == '15.4(3)M4' ||
ver == '15.4(3)M5' ||
ver == '15.4(3)M6' ||
ver == '15.4(3)M6a' ||
ver == '15.5(1)T' ||
ver == '15.5(1)T1' ||
ver == '15.5(1)T2' ||
ver == '15.5(1)T3' ||
ver == '15.5(1)T4' ||
ver == '15.5(2)T' ||
ver == '15.5(2)T1' ||
ver == '15.5(2)T2' ||
ver == '15.5(2)T3' ||
ver == '15.5(2)T4' ||
ver == '15.5(3)M' ||
ver == '15.5(3)M0a' ||
ver == '15.5(3)M1' ||
ver == '15.5(3)M2' ||
ver == '15.6(1)T' ||
ver == '15.6(1)T0a' ||
ver == '15.6(1)T1' ||
ver == '15.6(1)T2' ||
ver == '15.6(2)T' ||
ver == '15.6(2)T1' ||
ver == '15.6(3)M' ||
ver == '15.6(3)M0a'
) flag++;
cmds = make_list();
# Check that device is configured as a DHCP client
if (flag && get_kb_item("Host/local_checks_enabled"))
{
flag = 0;
buf = cisco_command_kb_item("Host/Cisco/Config/show running-config | include dhcp", "show running-config | include dhcp");
if (check_cisco_result(buf))
{
if (preg(string:buf, pattern:"ip address dhcp", multiline:TRUE))
{
cmds = make_list(cmds, "show running-config | include dhcp");
# Check if device is configured as a DHCP server or DHCP relay agent
buf2 = cisco_command_kb_item("Host/Cisco/Config/show running-config | include helper|(ip dhcp pool)", "show running-config | include helper|(ip dhcp pool)");
if (check_cisco_result(buf2))
{
if (preg(multiline:TRUE, pattern:"ip dhcp pool |ip helper-address [0-9\.]+", string:buf2))
{
cmds = make_list(cmds,"show running-config | include helper|(ip dhcp pool)");
# Check if device is configured to send DHCP Inform/Discover messages
# If device is configured to send DHCP Inform and Discover messages
# then not vuln
buf3 = cisco_command_kb_item("Host/Cisco/Config/show running-config | include (ip dhcp-client network-discovery)", "show running-config | include (ip dhcp-client network-discovery)");
if (empty(buf3) || check_cisco_result(buf3))
{
if (preg(multiline:TRUE, pattern:"ip dhcp-client network-discovery informs .* discovers .*", string:buf3))
{
flag = 0;
}
else
{
flag = 1;
cmds = make_list(cmds,"show running-config | include (ip dhcp-client network-discovery)");
}
}
}
}
}
}
else if (cisco_needs_enable(buf))
override = 1;
if (!flag && !override) audit(AUDIT_OS_CONF_NOT_VULN, "Cisco IOS", ver);
}
if (flag || override)
{
security_report_cisco(
port : 0,
severity : SECURITY_HOLE,
override : override,
version : ver,
bug_id : "CSCuu43892",
cmds : cmds
);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Related
cvelist
cvelist
CVE-2017-3864
2017-03-22 19:00:00
nessus
nessus
Cisco IOS XE DHCP Client DoS (cisco-sa-20170322-dhcpc)
2017-03-28 00:00:00
openvas
openvas
Cisco IOS XE Software DHCP Client Denial of Service Vulnerability
2017-03-23 00:00:00
Cisco IOS and IOS XE Software DHCP Client Denial of Service Vulnerability
2017-03-23 00:00:00
cve
cve
CVE-2017-3864
2017-03-22 19:59:00
prion
prion
Race condition
2017-03-22 19:59:00
nvd
nvd
CVE-2017-3864
2017-03-22 19:59:00
cisco
cisco
Cisco IOS and IOS XE Software DHCP Client Denial of Service Vulnerability
2017-03-22 16:00:00
threatpost
threatpost
Cisco Patches Critical IOx Vulnerability
2017-03-23 15:24:47
CVSS2
7.8
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS
0.002
Percentile
62.0%
Related for CISCO-SA-20170322-DHCPC-IOS.NASL