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nessusThis script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.SMB_NT_MS21_SEP_5005633.NASL
HistorySep 14, 2021 - 12:00 a.m.

KB5005615: Windows 7 and Windows Server 2008 R2 September 2021 Security Update

2021-09-1400:00:00
This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
38

9.3 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

8.8 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.1 High

AI Score

Confidence

Low

0.69 Medium

EPSS

Percentile

98.0%

The remote Windows host is missing security update 5005615 or cumulative update 5005633. It is, therefore, affected by multiple vulnerabilities :

  • An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges.
    (CVE-2021-36955, CVE-2021-36963, CVE-2021-36964, CVE-2021-36968, CVE-2021-38628, CVE-2021-38630, CVE-2021-38633, CVE-2021-38638, CVE-2021-38639, CVE-2021-38667, CVE-2021-38671, CVE-2021-40447)

  • An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-36960, CVE-2021-36962, CVE-2021-36969, CVE-2021-38629, CVE-2021-38635, CVE-2021-38636)

  • An memory corruption vulnerability exists. An attacker can exploit this to corrupt the memory and cause unexpected behaviors within the system/application.
    (CVE-2021-26435)

  • A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-36965, CVE-2021-36958)

  • A denial of service (DoS) vulnerability. An attacker can exploit this issue to cause the affected component to deny system or application services. (CVE-2021-36961)

  • A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2021-36959)

#%NASL_MIN_LEVEL 70300
#
# (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('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(153379);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/17");

  script_cve_id(
    "CVE-2021-26435",
    "CVE-2021-36955",
    "CVE-2021-36958",
    "CVE-2021-36959",
    "CVE-2021-36960",
    "CVE-2021-36961",
    "CVE-2021-36962",
    "CVE-2021-36963",
    "CVE-2021-36964",
    "CVE-2021-36965",
    "CVE-2021-36968",
    "CVE-2021-36969",
    "CVE-2021-38628",
    "CVE-2021-38629",
    "CVE-2021-38630",
    "CVE-2021-38633",
    "CVE-2021-38635",
    "CVE-2021-38636",
    "CVE-2021-38638",
    "CVE-2021-38639",
    "CVE-2021-38667",
    "CVE-2021-38671",
    "CVE-2021-40447"
  );
  script_xref(name:"MSKB", value:"5005615");
  script_xref(name:"MSKB", value:"5005633");
  script_xref(name:"MSFT", value:"MS21-5005615");
  script_xref(name:"MSFT", value:"MS21-5005633");
  script_xref(name:"IAVA", value:"2021-A-0431-S");
  script_xref(name:"IAVA", value:"2021-A-0429-S");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2021/11/17");

  script_name(english:"KB5005615: Windows 7 and Windows Server 2008 R2 September 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 5005615
or cumulative update 5005633. It is, therefore, affected by
multiple vulnerabilities :

  - An elevation of privilege vulnerability. An attacker can
    exploit this to gain elevated privileges.
    (CVE-2021-36955, CVE-2021-36963, CVE-2021-36964,
    CVE-2021-36968, CVE-2021-38628, CVE-2021-38630,
    CVE-2021-38633, CVE-2021-38638, CVE-2021-38639,
    CVE-2021-38667, CVE-2021-38671, CVE-2021-40447)

  - An information disclosure vulnerability. An attacker can
    exploit this to disclose potentially sensitive
    information. (CVE-2021-36960, CVE-2021-36962,
    CVE-2021-36969, CVE-2021-38629, CVE-2021-38635,
    CVE-2021-38636)

  - An memory corruption vulnerability exists. An attacker
    can exploit this to corrupt the memory and cause
    unexpected behaviors within the system/application.
    (CVE-2021-26435)

  - A remote code execution vulnerability. An attacker can
    exploit this to bypass authentication and execute
    unauthorized arbitrary commands. (CVE-2021-36965, CVE-2021-36958)

  - A denial of service (DoS) vulnerability. An attacker can
    exploit this issue to cause the affected component to
    deny system or application services. (CVE-2021-36961)

  - A session spoofing vulnerability exists. An attacker can
    exploit this to perform actions with the privileges of
    another user. (CVE-2021-36959)");
  # https://support.microsoft.com/en-us/topic/september-14-2021-kb5005615-security-only-update-78aa3b33-a4d9-49ad-bb28-1394943a3d7b
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?deeac612");
  # https://support.microsoft.com/en-us/topic/september-14-2021-kb5005633-monthly-rollup-cc6f560a-86da-4540-8bb1-df118fa45eb8
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c1c2d7a2");
  script_set_attribute(attribute:"solution", value:
"Apply Security Only update KB5005615 or Cumulative Update KB5005633.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-36958");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-36965");

  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:"vuln_publication_date", value:"2021/09/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/09/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/09/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows_server_2008:r2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows_7");
  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('audit.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_hotfixes.inc');
include('smb_func.inc');
include('misc_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = "MS21-09";
kbs = make_list('5005615', '5005633');

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(win7:'1') <= 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:"6.1",
                   sp:1,
                   rollup_date:'09_2021',
                   bulletin:bulletin,
                   rollup_kb_list:[5005615, 5005633])
)
{
  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());
}
VendorProductVersionCPE
microsoftwindows_7cpe:/o:microsoft:windows_7
microsoftwindows_server_2008r2cpe:/o:microsoft:windows_server_2008:r2

References

9.3 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

8.8 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.1 High

AI Score

Confidence

Low

0.69 Medium

EPSS

Percentile

98.0%