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nessusThis script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.NESSUS_TNS_2021_11.NASL
HistoryJun 15, 2021 - 12:00 a.m.

Tenable Nessus 8.x.x < 8.15.0 Multiple Vulnerabilities (TNS-2021-11)

2021-06-1500:00:00
This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
80

7.8 High

CVSS2

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.6 High

AI Score

Confidence

High

0.582 Medium

EPSS

Percentile

97.7%

According to its self-reported version, the Tenable Nessus application running on the remote host is prior to 8.15.0. It is, therefore, affected by multiple vulnerabilities:

  • Multiple local privilege escalation vulnerabilities. A local attacker can exploit these to gain administrator privileges to the system. (CVE-2021-20099, CVE-2021-20100)

  • In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks). (CVE-2018-20843)

  • In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read. (CVE-2019-15903)

  • In SQLite through 3.29.0, whereLoopAddBtreeIndex in sqlite3.c can crash a browser or other application because of missing validation of a sqlite_stat1 sz field, aka a ‘severe division by zero in the query planner.’ (CVE-2019-16168)

Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

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

if (description)
{
  script_id(150798);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/13");

  script_cve_id(
    "CVE-2018-20843",
    "CVE-2019-15903",
    "CVE-2019-16168",
    "CVE-2021-20099",
    "CVE-2021-20100"
  );
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");
  script_xref(name:"IAVB", value:"2021-B-0039-S");

  script_name(english:"Tenable Nessus 8.x.x < 8.15.0 Multiple Vulnerabilities (TNS-2021-11)");

  script_set_attribute(attribute:"synopsis", value:
"Tenable Nessus running on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Tenable Nessus application running on the remote host is prior to 
8.15.0. It is, therefore, affected by multiple vulnerabilities:

  - Multiple local privilege escalation vulnerabilities. A local attacker can exploit these to gain administrator
    privileges to the system. (CVE-2021-20099, CVE-2021-20100)

  - In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make
    the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for
    denial-of-service attacks). (CVE-2018-20843)

  - In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document
    parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in
    a heap-based buffer over-read. (CVE-2019-15903)

  - In SQLite through 3.29.0, whereLoopAddBtreeIndex in sqlite3.c can crash a browser or other application because of
    missing validation of a sqlite_stat1 sz field, aka a 'severe division by zero in the query planner.'
    (CVE-2019-16168)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version   
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.tenable.com/security/tns-2021-11");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Tenable Nessus version 8.15.0 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-20100");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/06/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/15");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:tenable:nessus");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("nessus_detect.nasl", "nessus_installed_win.nbin", "nessus_installed_linux.nbin", "macos_nessus_installed.nbin");
  script_require_keys("installed_sw/Tenable Nessus");

  exit(0);
}

include('vcf_extras.inc');

var app_info, constraints;

app_info = vcf::combined_get_app_info(app:'Tenable Nessus');

vcf::check_granularity(app_info:app_info, sig_segments:3);

constraints = [
  { 'min_version' : '8.0.0', 'fixed_version' : '8.15.0' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);

VendorProductVersionCPE
tenablenessuscpe:/a:tenable:nessus

7.8 High

CVSS2

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.6 High

AI Score

Confidence

High

0.582 Medium

EPSS

Percentile

97.7%