KB5000809: Windows 10 Version 1803 March 2021 Security Update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the Microsoft Security Updates API. The text
# itself is copyright (C) Microsoft Corporation.
#

include('compat.inc');

if (description)
{
  script_id(147224);
  script_version("1.19");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/17");

  script_cve_id(
    "CVE-2021-1640",
    "CVE-2021-1729",
    "CVE-2021-24095",
    "CVE-2021-24107",
    "CVE-2021-26411",
    "CVE-2021-26861",
    "CVE-2021-26862",
    "CVE-2021-26863",
    "CVE-2021-26866",
    "CVE-2021-26868",
    "CVE-2021-26869",
    "CVE-2021-26870",
    "CVE-2021-26871",
    "CVE-2021-26872",
    "CVE-2021-26873",
    "CVE-2021-26875",
    "CVE-2021-26876",
    "CVE-2021-26878",
    "CVE-2021-26879",
    "CVE-2021-26880",
    "CVE-2021-26881",
    "CVE-2021-26882",
    "CVE-2021-26884",
    "CVE-2021-26885",
    "CVE-2021-26886",
    "CVE-2021-26889",
    "CVE-2021-26892",
    "CVE-2021-26898",
    "CVE-2021-26899",
    "CVE-2021-26901",
    "CVE-2021-27077",
    "CVE-2021-27085"
  );
  script_xref(name:"MSKB", value:"5000809");
  script_xref(name:"MSFT", value:"MS21-5000809");
  script_xref(name:"IAVA", value:"2021-A-0129-S");
  script_xref(name:"IAVA", value:"2021-A-0130-S");
  script_xref(name:"IAVA", value:"2021-A-0134-S");
  script_xref(name:"IAVA", value:"2021-A-0131-S");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2021/11/17");
  script_xref(name:"CEA-ID", value:"CEA-2021-0015");

  script_name(english:"KB5000809: Windows 10 Version 1803 March 2021 Security Update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote Windows host is missing security update 5000809.
It is, therefore, affected by multiple vulnerabilities :

  - An information disclosure vulnerability. An attacker can
    exploit this to disclose potentially sensitive
    information. (CVE-2021-24107, CVE-2021-26869,
    CVE-2021-26884)

  - An memory corruption vulnerability exists. An attacker
    can exploit this to corrupt the memory and cause
    unexpected behaviors within the system/application.
    (CVE-2021-26411)

  - A denial of service (DoS) vulnerability. An attacker can
    exploit this issue to cause the affected component to
    deny system or application services. (CVE-2021-26879,
    CVE-2021-26886)

  - An elevation of privilege vulnerability. An attacker can
    exploit this to gain elevated privileges.
    (CVE-2021-1640, CVE-2021-1729, CVE-2021-24095,
    CVE-2021-26862, CVE-2021-26863, CVE-2021-26866,
    CVE-2021-26868, CVE-2021-26870, CVE-2021-26871,
    CVE-2021-26872, CVE-2021-26873, CVE-2021-26875,
    CVE-2021-26878, CVE-2021-26880, CVE-2021-26882,
    CVE-2021-26885, CVE-2021-26889, CVE-2021-26898,
    CVE-2021-26899, CVE-2021-26901, CVE-2021-27077)

  - A remote code execution vulnerability. An attacker can
    exploit this to bypass authentication and execute
    unauthorized arbitrary commands. (CVE-2021-26861,
    CVE-2021-26876, CVE-2021-26881, CVE-2021-27085)

  - A security feature bypass vulnerability exists. An
    attacker can exploit this and bypass the security
    feature and perform unauthorized actions compromising
    the integrity of the system/application.
    (CVE-2021-26892)");
  # https://support.microsoft.com/en-us/topic/march-9-2021-kb5000809-os-build-17134-2087-2601a686-8e12-449d-913c-a63a9b73e2eb
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4ef7d4b2");
  script_set_attribute(attribute:"solution", value:
"Apply Cumulative Update KB5000809.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-27085");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/03/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/03/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows_10_1803");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("smb_check_rollup.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

include('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS21-03';
kbs = make_list(
  '5000809'
);

if (get_kb_item('Host/patch_management_checks')) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE);

get_kb_item_or_exit('SMB/Registry/Enumerated');
get_kb_item_or_exit('SMB/WindowsVersion', exit_code:1);

if (hotfix_check_sp_range(win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN);

share = hotfix_get_systemdrive(as_share:TRUE, exit_on_fail:TRUE);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);

if (
  smb_check_rollup(os:'10',
                   sp:0,
                   os_build:'17134',
                   rollup_date:'03_2021',
                   bulletin:bulletin,
                   rollup_kb_list:[5000809])
)
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_hole();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, hotfix_get_audit_report());
}