Vulnerabilities > CVE-2018-0151 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Cisco IOS XE 16.5.1

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
cisco
CWE-119
critical
nessus
NVD
Published: 2018-03-28
Updated: 2019-12-02

Summary

A vulnerability in the quality of service (QoS) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges. The vulnerability is due to incorrect bounds checking of certain values in packets that are destined for UDP port 18999 of an affected device. An attacker could exploit this vulnerability by sending malicious packets to an affected device. When the packets are processed, an exploitable buffer overflow condition may occur. A successful exploit could allow the attacker to execute arbitrary code on the affected device with elevated privileges. The attacker could also leverage this vulnerability to cause the device to reload, causing a temporary DoS condition while the device is reloading. The malicious packets must be destined to and processed by an affected device. Traffic transiting a device will not trigger the vulnerability. Cisco Bug IDs: CSCvf73881.

Vulnerable Configurations

Part Description Count
OS
Cisco
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyCISCO
    NASL idCISCO-SA-20180328-QOS-IOSXE.NASL
    descriptionAccording to its self-reported version, the IOS XE is affected by one or more vulnerabilities. Please see the included Cisco BIDs and the Cisco Security Advisory for more information.
    last seen2020-06-01
    modified2020-06-02
    plugin id108721
    published2018-03-29
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108721
    titleCisco IOS XE Software Quality of Service Remote Code Execution Vulnerability
    code
    #TRUSTED 40f033780ed059ea8fc0ca1b2cbbd23cf8785fec0d25e5c4bde95380ebac7aa324d9ee86be5d0b3260ce50d7b658cc6e174b8d4068c86d9673b1c54e74ea99aa18e3db3ddd4896907703b9d58fd85cc79edd0081d2bbce3e92fd07cb76b8dd8f79478efe6d1eebc20575a518949e41279b6ae80caa63c4f9e18992d91d3bfb94fd8e8a54433a332c57eb49783e0a320997f7199c226304a3237d03d34a2f5cd2e0fe59842089a7b09298ceb14466078e3e7badf57dcb8d6f4c0d055aab72fb9e299871f2b041210d2a1ffc8db1d488c3477430095ae341a4532f03a40b2fb702212abd7917aa42ce96fbec63e8bf0dbcec6b679d10702f74d76c28d9fd3389ddfaff51486e21fc0126da99d1f3c0c23695f2c524f617956a50e4aa3c024aa2d2706aa4b6809f1740b1a44b1cc644e6939c4dbe62c674fbb1f388128ff0cef7063ef073dd091cb2f0a5bde4e37446f9cc3e3a2137b92b2badd95e2a1159f3492a04e3d88636a31612d5d62fe55f74846414e9ba4f176316c8274e3d8ca9c71e763ab6cb850ff325095ca442cced8aa3b5c4402152b78ab36295a2eba102cdd98c2dbb19e942fb7fba1495dd87fa9dc32383f750f85ce4f94810842c6b52cc73e427b25c640f966a31f28755614c73ee5861e687ebdb5ab9c0bc612d39e587b9e3e8196497893d22771ceeabb7d2805acb9876621ba3ac0a5331c39711d5c2e1ca
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(108721);
  script_version("1.12");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id("CVE-2018-0151");
  script_bugtraq_id(103540);
  script_xref(name:"CISCO-BUG-ID", value:"CSCvf73881");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20180328-qos");

  script_name(english:"Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability");
  script_summary(english:"Checks the IOS XE 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 IOS XE is affected
by one or more vulnerabilities. Please see the included Cisco BIDs
and the Cisco Security Advisory for more information.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-qos
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?10160b36");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvf73881");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID(s)
CSCvf73881.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/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:U/C:H/I:H/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:"2018/03/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cpe:/o:cisco:ios_xe");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_ios_xe_version.nasl");
  script_require_keys("Host/Cisco/IOS-XE/Version");

  exit(0);
}

include("audit.inc");
include("cisco_workarounds.inc");
include("ccf.inc");

product_info = cisco::get_product_info(name:"Cisco IOS XE Software");

version_list = make_list(
  "15.2(2)E5b",
  "15.2(5a)E1",
  "15.2(6)E0b",
  "3.14.0S",
  "3.15.0S",
  "3.14.1S",
  "3.16.0S",
  "3.14.2S",
  "3.14.3S",
  "3.15.1S",
  "3.15.2S",
  "3.16.1S",
  "3.16.1aS",
  "3.15.3S",
  "3.16.2S",
  "15.5(3)S0a",
  "3.16.3S",
  "3.14.4S",
  "15.5(2)S4",
  "15.5(3)S4",
  "3.16.5S",
  "3.16.6S",
  "15.5(3)S6a",
  "15.5(3)S6b",
  "15.5(1)T",
  "15.5(2)T",
  "15.5(1)T3",
  "15.5(2)T1",
  "15.5(2)T2",
  "15.5(2)T3",
  "15.5(2)T4",
  "15.5(1)T4",
  "15.5(3)M",
  "15.5(3)M1",
  "15.5(3)M0a",
  "15.5(3)M2",
  "15.5(3)M3",
  "15.5(3)M4",
  "15.5(3)M4a",
  "15.5(3)M5",
  "15.5(3)M6",
  "15.5(3)M6a",
  "15.5(3)SN",
  "3.17.0S",
  "3.18.0S",
  "15.6(2)S1",
  "3.17.1S",
  "3.17.2S",
  "15.6(2)S0a",
  "15.6(2)S2",
  "3.17.3S",
  "15.6(2)S3",
  "3.17.4S",
  "15.6(2)S4",
  "15.6(1)T",
  "15.6(2)T",
  "15.6(1)T0a",
  "15.6(1)T1",
  "15.6(2)T1",
  "15.6(1)T2",
  "15.6(2)T2",
  "15.6(1)T3",
  "15.6(2)T3",
  "15.3(1)SY3",
  "15.6(2)SP",
  "15.6(2)SP1",
  "15.6(2)SP2",
  "15.6(2)SP3",
  "15.6(2)SN",
  "15.3(3)JD8",
  "15.6(3)M",
  "15.6(3)M1",
  "15.6(3)M0a",
  "15.6(3)M1b",
  "15.6(3)M2",
  "15.6(3)M2a",
  "15.6(3)M3",
  "15.6(3)M3a",
  "15.3(3)JDA8",
  "15.3(3)JF2",
  "15.7(3)M",
  "15.7(3)M0a"
  );

workarounds = make_list(CISCO_WORKAROUNDS['show_udp_dmvpn']);
workaround_params = make_list();

reporting = make_array(
  'port'     , 0,
  'severity' , SECURITY_HOLE,
  'version'  , product_info['version'],
  'bug_id'   , "CSCvf73881",
  'cmds'     , make_list("show udp")
);

cisco::check_and_report(product_info:product_info, workarounds:workarounds, workaround_params:workaround_params, reporting:reporting, vuln_versions:version_list);
  • NASL familyCISCO
    NASL idCISCO-SA-20180328-QOS-IOS.NASL
    descriptionAccording to its self-reported version, the IOS is affected by one or more vulnerabilities. Please see the included Cisco BIDs and the Cisco Security Advisory for more information.
    last seen2020-06-01
    modified2020-06-02
    plugin id108720
    published2018-03-29
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108720
    titleCisco IOS Software Quality of Service Remote Code Execution Vulnerability
    code
    #TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(108720);
  script_version("1.12");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id("CVE-2018-0151");
  script_bugtraq_id(103540);
  script_xref(name:"CISCO-BUG-ID", value:"CSCvf73881");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20180328-qos");

  script_name(english:"Cisco IOS Software Quality of Service Remote Code Execution Vulnerability");
  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 IOS is affected
by one or more vulnerabilities. Please see the included Cisco BIDs
and the Cisco Security Advisory for more information.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-qos
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?10160b36");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvf73881");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID(s)
CSCvf73881.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/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:U/C:H/I:H/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:"2018/03/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cpe:/o:cisco:ios");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2018-2019 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_workarounds.inc");
include("ccf.inc");

product_info = cisco::get_product_info(name:"Cisco IOS");

version_list = make_list(
  "15.2(2)E5b",
  "15.2(5a)E1",
  "15.2(6)E0b",
  "15.5(1)S",
  "15.5(2)S",
  "15.5(1)S1",
  "15.5(3)S",
  "15.5(1)S2",
  "15.5(1)S3",
  "15.5(2)S1",
  "15.5(2)S2",
  "15.5(3)S1",
  "15.5(3)S1a",
  "15.5(2)S3",
  "15.5(3)S2",
  "15.5(3)S0a",
  "15.5(3)S3",
  "15.5(1)S4",
  "15.5(2)S4",
  "15.5(3)S4",
  "15.5(3)S5",
  "15.5(3)S6",
  "15.5(3)S6a",
  "15.5(3)S6b",
  "15.5(1)T",
  "15.5(2)T",
  "15.5(1)T3",
  "15.5(2)T1",
  "15.5(2)T2",
  "15.5(2)T3",
  "15.5(2)T4",
  "15.5(1)T4",
  "15.5(3)M",
  "15.5(3)M1",
  "15.5(3)M0a",
  "15.5(3)M2",
  "15.5(3)M3",
  "15.5(3)M4",
  "15.5(3)M4a",
  "15.5(3)M5",
  "15.5(3)M6",
  "15.5(3)M6a",
  "15.5(3)SN",
  "15.6(1)S",
  "15.6(2)S",
  "15.6(2)S1",
  "15.6(1)S1",
  "15.6(1)S2",
  "15.6(2)S0a",
  "15.6(2)S2",
  "15.6(1)S3",
  "15.6(2)S3",
  "15.6(1)S4",
  "15.6(2)S4",
  "15.6(1)T",
  "15.6(2)T",
  "15.6(1)T0a",
  "15.6(1)T1",
  "15.6(2)T1",
  "15.6(1)T2",
  "15.6(2)T2",
  "15.6(1)T3",
  "15.6(2)T3",
  "15.3(1)SY3",
  "15.6(2)SP",
  "15.6(2)SP1",
  "15.6(2)SP2",
  "15.6(2)SP3",
  "15.6(2)SN",
  "15.3(3)JD8",
  "15.6(3)M",
  "15.6(3)M1",
  "15.6(3)M0a",
  "15.6(3)M1b",
  "15.6(3)M2",
  "15.6(3)M2a",
  "15.6(3)M3",
  "15.6(3)M3a",
  "15.3(3)JDA8",
  "15.3(3)JF2",
  "15.7(3)M",
  "15.7(3)M0a"
  );

workarounds = make_list(CISCO_WORKAROUNDS['show_udp_dmvpn']);
workaround_params = make_list();

reporting = make_array(
  'port'     , 0,
  'severity' , SECURITY_HOLE,
  'version'  , product_info['version'],
  'bug_id'   , "CSCvf73881",
  'cmds'     , make_list("show udp")
);

cisco::check_and_report(product_info:product_info, workarounds:workarounds, workaround_params:workaround_params, reporting:reporting, vuln_versions:version_list);

Related news

References