Cisco IOS Software TrustSec CLI Parser DoS (cisco-sa-trustsec-dos-7fuXDR2)

#TRUSTED 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
#TRUST-RSA-SHA256 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
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(154234);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/28");

  script_cve_id("CVE-2021-34699");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvx66699");
  script_xref(name:"CISCO-SA", value:"cisco-sa-trustsec-dos-7fuXDR2");
  script_xref(name:"IAVA", value:"2021-A-0441-S");

  script_name(english:"Cisco IOS Software TrustSec CLI Parser DoS (cisco-sa-trustsec-dos-7fuXDR2)");

  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, Cisco IOS is affected by a vulnerability in the TrustSec CLI parser that allows
an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to an improper
interaction between the web UI and the CLI parser. An attacker could exploit this vulnerability by requesting a
particular CLI command to be run through the web UI. A successful exploit could allow the attacker to cause the device
to reload, resulting in a denial of service (DoS) condition. Please see the included Cisco BIDs and Cisco Security
Advisory for more information.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-trustsec-dos-7fuXDR2
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c00ec9af");
  script_set_attribute(attribute:"see_also", value:"http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74581");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx66699");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvx66699");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/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:"cvss_score_source", value:"CVE-2021-34699");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(435);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/09/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/09/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/19");

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

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

  script_copyright(english:"This script is Copyright (C) 2021-2023 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('cisco_workarounds.inc');
include('ccf.inc');

var product_info = cisco::get_product_info(name:'Cisco IOS');

var version_list=make_list(
  '12.2(6)I1',
  '15.0(1)SY',
  '15.0(1)SY1',
  '15.0(1)SY2',
  '15.0(1)SY3',
  '15.0(1)SY4',
  '15.0(1)SY5',
  '15.0(1)SY6',
  '15.0(1)SY7',
  '15.0(1)SY7a',
  '15.0(1)SY8',
  '15.0(1)SY9',
  '15.0(1)SY10',
  '15.0(2)EJ',
  '15.0(2)EJ1',
  '15.0(2)EK',
  '15.0(2)EK1',
  '15.0(2)EX',
  '15.0(2)EX1',
  '15.0(2)EX2',
  '15.0(2)EX3',
  '15.0(2)EX4',
  '15.0(2)EX5',
  '15.0(2)EX6',
  '15.0(2)EX7',
  '15.0(2)EX8',
  '15.0(2)EX10',
  '15.0(2)EX11',
  '15.0(2)EX12',
  '15.0(2)EX13',
  '15.0(2)EY',
  '15.0(2)EY1',
  '15.0(2)EY2',
  '15.0(2)EY3',
  '15.0(2)EZ',
  '15.0(2)SE',
  '15.0(2)SE1',
  '15.0(2)SE2',
  '15.0(2)SE3',
  '15.0(2)SE4',
  '15.0(2)SE5',
  '15.0(2)SE6',
  '15.0(2)SE7',
  '15.0(2)SE8',
  '15.0(2)SE9',
  '15.0(2)SE10',
  '15.0(2)SE10a',
  '15.0(2)SE11',
  '15.0(2)SE12',
  '15.0(2)SE13',
  '15.0(2)SE13a',
  '15.0(2a)EX5',
  '15.0(2a)SE9',
  '15.1(1)SY',
  '15.1(1)SY1',
  '15.1(1)SY2',
  '15.1(1)SY3',
  '15.1(1)SY4',
  '15.1(1)SY5',
  '15.1(1)SY6',
  '15.1(2)SY',
  '15.1(2)SY1',
  '15.1(2)SY2',
  '15.1(2)SY3',
  '15.1(2)SY4',
  '15.1(2)SY4a',
  '15.1(2)SY5',
  '15.1(2)SY6',
  '15.1(2)SY7',
  '15.1(2)SY8',
  '15.1(2)SY9',
  '15.1(2)SY10',
  '15.1(2)SY11',
  '15.1(2)SY12',
  '15.1(2)SY13',
  '15.1(2)SY14',
  '15.1(2)SY15',
  '15.1(2)SY16',
  '15.1(3)SVR1',
  '15.1(3)SVR2',
  '15.1(3)SVR3',
  '15.1(3)SVS',
  '15.1(3)SVS1',
  '15.1(3)SVT1',
  '15.1(3)SVT2',
  '15.2(1)E',
  '15.2(1)E1',
  '15.2(1)E2',
  '15.2(1)E3',
  '15.2(1)EY',
  '15.2(1)SY',
  '15.2(1)SY0a',
  '15.2(1)SY1',
  '15.2(1)SY1a',
  '15.2(1)SY2',
  '15.2(1)SY3',
  '15.2(1)SY4',
  '15.2(1)SY5',
  '15.2(1)SY6',
  '15.2(1)SY7',
  '15.2(1)SY8',
  '15.2(2)E',
  '15.2(2)E1',
  '15.2(2)E2',
  '15.2(2)E3',
  '15.2(2)E4',
  '15.2(2)E5',
  '15.2(2)E5a',
  '15.2(2)E5b',
  '15.2(2)E6',
  '15.2(2)E7',
  '15.2(2)E7b',
  '15.2(2)E8',
  '15.2(2)E9',
  '15.2(2)E9a',
  '15.2(2)E10',
  '15.2(2)E10a',
  '15.2(2)EA',
  '15.2(2)EA1',
  '15.2(2)EA2',
  '15.2(2)EA3',
  '15.2(2)EB',
  '15.2(2)EB1',
  '15.2(2)EB2',
  '15.2(2)SY',
  '15.2(2)SY1',
  '15.2(2)SY2',
  '15.2(2)SY3',
  '15.2(2a)E1',
  '15.2(2a)E2',
  '15.2(2b)E',
  '15.2(3)E',
  '15.2(3)E1',
  '15.2(3)E2',
  '15.2(3)E3',
  '15.2(3)E4',
  '15.2(3)E5',
  '15.2(3)EA',
  '15.2(3a)E',
  '15.2(3m)E2',
  '15.2(3m)E7',
  '15.2(3m)E8',
  '15.2(4)E',
  '15.2(4)E1',
  '15.2(4)E2',
  '15.2(4)E3',
  '15.2(4)E4',
  '15.2(4)E5',
  '15.2(4)E5a',
  '15.2(4)E6',
  '15.2(4)E7',
  '15.2(4)E8',
  '15.2(4)E9',
  '15.2(4)E10',
  '15.2(4)E10a',
  '15.2(4)E10b',
  '15.2(4)EA',
  '15.2(4)EA1',
  '15.2(4)EA2',
  '15.2(4)EA3',
  '15.2(4)EA4',
  '15.2(4)EA5',
  '15.2(4)EA6',
  '15.2(4)EA7',
  '15.2(4)EA8',
  '15.2(4)EA9',
  '15.2(4)EA9a',
  '15.2(4)EC1',
  '15.2(4)EC2',
  '15.2(4m)E1',
  '15.2(4m)E2',
  '15.2(4m)E3',
  '15.2(4n)E2',
  '15.2(4o)E2',
  '15.2(4o)E3',
  '15.2(4p)E1',
  '15.2(4q)E1',
  '15.2(4s)E1',
  '15.2(5)E',
  '15.2(5)E1',
  '15.2(5)E2',
  '15.2(5)E2b',
  '15.2(5)E2c',
  '15.2(5)EA',
  '15.2(5)EX',
  '15.2(5a)E',
  '15.2(5a)E1',
  '15.2(5b)E',
  '15.2(5c)E',
  '15.2(6)E',
  '15.2(6)E0a',
  '15.2(6)E0c',
  '15.2(6)E1',
  '15.2(6)E1a',
  '15.2(6)E1s',
  '15.2(6)E2',
  '15.2(6)E2a',
  '15.2(6)E2b',
  '15.2(6)E3',
  '15.2(6)EB',
  '15.2(7)E',
  '15.2(7)E0a',
  '15.2(7)E0b',
  '15.2(7)E0s',
  '15.2(7)E1',
  '15.2(7)E1a',
  '15.2(7)E2',
  '15.2(7)E2a',
  '15.2(7)E2b',
  '15.2(7)E3',
  '15.2(7)E3a',
  '15.2(7)E3k',
  '15.2(7)E4',
  '15.2(7)E99',
  '15.2(7a)E0b',
  '15.2(7b)E0b',
  '15.2(8)E',
  '15.3(0)SY',
  '15.3(1)SY',
  '15.3(1)SY1',
  '15.3(1)SY2',
  '15.3(3)JD',
  '15.3(3)JD2',
  '15.3(3)JD3',
  '15.3(3)JD4',
  '15.3(3)JD5',
  '15.3(3)JD6',
  '15.3(3)JD7',
  '15.3(3)JD8',
  '15.3(3)JD9',
  '15.3(3)JD11',
  '15.3(3)JD12',
  '15.3(3)JD13',
  '15.3(3)JD14',
  '15.3(3)JD16',
  '15.3(3)JD17',
  '15.3(3)JE',
  '15.3(3)JF',
  '15.3(3)JF1',
  '15.3(3)JF2',
  '15.3(3)JF4',
  '15.3(3)JF5',
  '15.3(3)JF6',
  '15.3(3)JF7',
  '15.3(3)JF8',
  '15.3(3)JF9',
  '15.3(3)JF10',
  '15.3(3)JF11',
  '15.3(3)JF12',
  '15.3(3)JF12i',
  '15.3(3)JF14',
  '15.3(3)JF14i',
  '15.3(3)JG',
  '15.3(3)JG1',
  '15.3(3)JH',
  '15.3(3)JH1',
  '15.3(3)JI1',
  '15.3(3)JI3',
  '15.3(3)JI4',
  '15.3(3)JI5',
  '15.3(3)JI6',
  '15.3(3)JJ',
  '15.3(3)JJ1',
  '15.3(3)JK',
  '15.3(3)JK1',
  '15.3(3)JK1t',
  '15.3(3)JK2',
  '15.3(3)JK2a',
  '15.3(3)JK3',
  '15.3(3)JK4',
  '15.3(3)JK5',
  '15.3(3)JPI1',
  '15.3(3)JPI1t',
  '15.3(3)JPI4',
  '15.3(3)JPI5',
  '15.3(3)JPI5s',
  '15.3(3)JPI6a',
  '15.3(3)JPI7',
  '15.3(3)JPJ2',
  '15.3(3)JPJ2t',
  '15.3(3)JPJ3',
  '15.3(3)JPJ3a',
  '15.3(3)JPJ4',
  '15.3(3)JPJ5',
  '15.3(3)JPJ6',
  '15.3(3)JPK',
  '15.3(3)JPK1',
  '15.4(1)CG',
  '15.4(1)CG1',
  '15.4(1)S',
  '15.4(1)S1',
  '15.4(1)S2',
  '15.4(1)S3',
  '15.4(1)S4',
  '15.4(1)SY',
  '15.4(1)SY1',
  '15.4(1)SY2',
  '15.4(1)SY3',
  '15.4(1)SY4',
  '15.4(1)T',
  '15.4(1)T1',
  '15.4(1)T2',
  '15.4(1)T3',
  '15.4(1)T4',
  '15.4(2)CG',
  '15.4(2)S',
  '15.4(2)S1',
  '15.4(2)S2',
  '15.4(2)S3',
  '15.4(2)S4',
  '15.4(2)SN',
  '15.4(2)SN1',
  '15.4(2)T',
  '15.4(2)T1',
  '15.4(2)T2',
  '15.4(2)T3',
  '15.4(2)T4',
  '15.4(3)M',
  '15.4(3)M1',
  '15.4(3)M2',
  '15.4(3)M3',
  '15.4(3)M4',
  '15.4(3)M5',
  '15.4(3)M6',
  '15.4(3)M6a',
  '15.4(3)M7',
  '15.4(3)M7a',
  '15.4(3)M8',
  '15.4(3)M9',
  '15.4(3)M10',
  '15.4(3)S',
  '15.4(3)S0d',
  '15.4(3)S0e',
  '15.4(3)S0f',
  '15.4(3)S1',
  '15.4(3)S2',
  '15.4(3)S3',
  '15.4(3)S4',
  '15.4(3)S5',
  '15.4(3)S6',
  '15.4(3)S6a',
  '15.4(3)S7',
  '15.4(3)S8',
  '15.4(3)S9',
  '15.4(3)S10',
  '15.4(3)SN1',
  '15.4(3)SN1a',
  '15.5(1)S',
  '15.5(1)S1',
  '15.5(1)S2',
  '15.5(1)S3',
  '15.5(1)S4',
  '15.5(1)SN',
  '15.5(1)SN1',
  '15.5(1)SY',
  '15.5(1)SY1',
  '15.5(1)SY2',
  '15.5(1)SY3',
  '15.5(1)SY4',
  '15.5(1)SY5',
  '15.5(1)SY6',
  '15.5(1)SY7',
  '15.5(1)T',
  '15.5(1)T1',
  '15.5(1)T2',
  '15.5(1)T3',
  '15.5(1)T4',
  '15.5(2)S',
  '15.5(2)S1',
  '15.5(2)S2',
  '15.5(2)S3',
  '15.5(2)S4',
  '15.5(2)SN',
  '15.5(2)T',
  '15.5(2)T1',
  '15.5(2)T2',
  '15.5(2)T3',
  '15.5(2)T4',
  '15.5(2)XB',
  '15.5(3)M',
  '15.5(3)M0a',
  '15.5(3)M1',
  '15.5(3)M2',
  '15.5(3)M2a',
  '15.5(3)M3',
  '15.5(3)M4',
  '15.5(3)M4a',
  '15.5(3)M4b',
  '15.5(3)M4c',
  '15.5(3)M5',
  '15.5(3)M6',
  '15.5(3)M6a',
  '15.5(3)M7',
  '15.5(3)M8',
  '15.5(3)M9',
  '15.5(3)M10',
  '15.5(3)M11',
  '15.5(3)S',
  '15.5(3)S0a',
  '15.5(3)S1',
  '15.5(3)S1a',
  '15.5(3)S2',
  '15.5(3)S3',
  '15.5(3)S4',
  '15.5(3)S5',
  '15.5(3)S6',
  '15.5(3)S6a',
  '15.5(3)S6b',
  '15.5(3)S7',
  '15.5(3)S8',
  '15.5(3)S9',
  '15.5(3)S9a',
  '15.5(3)S10',
  '15.5(3)S10a',
  '15.5(3)S10b',
  '15.5(3)SN',
  '15.5(3)SN0a',
  '15.6(1)S',
  '15.6(1)S1',
  '15.6(1)S2',
  '15.6(1)S3',
  '15.6(1)S4',
  '15.6(1)SN',
  '15.6(1)SN1',
  '15.6(1)SN2',
  '15.6(1)SN3',
  '15.6(1)T',
  '15.6(1)T0a',
  '15.6(1)T1',
  '15.6(1)T2',
  '15.6(1)T3',
  '15.6(2)S',
  '15.6(2)S1',
  '15.6(2)S2',
  '15.6(2)S3',
  '15.6(2)S4',
  '15.6(2)SN',
  '15.6(2)SP',
  '15.6(2)SP1',
  '15.6(2)SP2',
  '15.6(2)SP3',
  '15.6(2)SP4',
  '15.6(2)SP5',
  '15.6(2)SP6',
  '15.6(2)SP7',
  '15.6(2)SP8',
  '15.6(2)SP8a',
  '15.6(2)SP9',
  '15.6(2)T',
  '15.6(2)T0a',
  '15.6(2)T1',
  '15.6(2)T2',
  '15.6(2)T3',
  '15.6(3)M',
  '15.6(3)M0a',
  '15.6(3)M1',
  '15.6(3)M1a',
  '15.6(3)M1b',
  '15.6(3)M2',
  '15.6(3)M2a',
  '15.6(3)M3',
  '15.6(3)M3a',
  '15.6(3)M4',
  '15.6(3)M5',
  '15.6(3)M6',
  '15.6(3)M6a',
  '15.6(3)M6b',
  '15.6(3)M7',
  '15.6(3)M8',
  '15.6(3)M9',
  '15.6(3)SN',
  '15.6(4)SN',
  '15.6(5)SN',
  '15.6(7)SN',
  '15.6(7)SN1',
  '15.6(7)SN2',
  '15.7(3)M',
  '15.7(3)M0a',
  '15.7(3)M1',
  '15.7(3)M2',
  '15.7(3)M3',
  '15.7(3)M4',
  '15.7(3)M4a',
  '15.7(3)M4b',
  '15.7(3)M5',
  '15.7(3)M6',
  '15.7(3)M7',
  '15.7(3)M8',
  '15.8(3)M',
  '15.8(3)M0a',
  '15.8(3)M0b',
  '15.8(3)M1',
  '15.8(3)M1a',
  '15.8(3)M2',
  '15.8(3)M2a',
  '15.8(3)M3',
  '15.8(3)M3a',
  '15.8(3)M3b',
  '15.8(3)M4',
  '15.8(3)M5',
  '15.8(3)M6',
  '15.9(3)M',
  '15.9(3)M0a',
  '15.9(3)M1',
  '15.9(3)M2',
  '15.9(3)M2a',
  '15.9(3)M3',
  '15.9(3)M3a',
  '15.9(3)M3b'
);

var workarounds = make_list(
  CISCO_WORKAROUNDS['generic_workaround']
);

var workaround_params = [
  WORKAROUND_CONFIG['HTTP_Server_iosxe'],
  WORKAROUND_CONFIG['active-session-modules'],
  WORKAROUND_CONFIG['subsys_cts_core'],
  {'require_all_generic_workarounds': TRUE}
];

var reporting = make_array(
  'port' , product_info['port'],
  'severity' , SECURITY_WARNING,
  'bug_id'   , 'CSCvx66699',
  'cmds'     , make_list('show running-config', 'show subsys'),
  'version'  , product_info['version']
);

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