KB4577053: Windows 7 and Windows Server 2008 R2 September 2020 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(140422);
  script_version("1.15");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/17");

  script_cve_id(
    "CVE-2020-0648",
    "CVE-2020-0664",
    "CVE-2020-0718",
    "CVE-2020-0761",
    "CVE-2020-0782",
    "CVE-2020-0790",
    "CVE-2020-0836",
    "CVE-2020-0838",
    "CVE-2020-0856",
    "CVE-2020-0878",
    "CVE-2020-0911",
    "CVE-2020-0912",
    "CVE-2020-0921",
    "CVE-2020-0922",
    "CVE-2020-1012",
    "CVE-2020-1013",
    "CVE-2020-1030",
    "CVE-2020-1031",
    "CVE-2020-1038",
    "CVE-2020-1039",
    "CVE-2020-1052",
    "CVE-2020-1074",
    "CVE-2020-1083",
    "CVE-2020-1091",
    "CVE-2020-1097",
    "CVE-2020-1115",
    "CVE-2020-1228",
    "CVE-2020-1245",
    "CVE-2020-1250",
    "CVE-2020-1252",
    "CVE-2020-1256",
    "CVE-2020-1285",
    "CVE-2020-1319",
    "CVE-2020-1376",
    "CVE-2020-1491",
    "CVE-2020-1508",
    "CVE-2020-1559",
    "CVE-2020-1589",
    "CVE-2020-1593",
    "CVE-2020-1596",
    "CVE-2020-1598"
  );
  script_xref(name:"MSKB", value:"4577051");
  script_xref(name:"MSKB", value:"4577053");
  script_xref(name:"MSFT", value:"MS20-4577051");
  script_xref(name:"MSFT", value:"MS20-4577053");
  script_xref(name:"IAVA", value:"2020-A-0408-S");
  script_xref(name:"IAVA", value:"2020-A-0423-S");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");
  script_xref(name:"CEA-ID", value:"CEA-2020-0118");

  script_name(english:"KB4577053: Windows 7 and Windows Server 2008 R2 September 2020 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 4577053
or cumulative update 4577051. It is, therefore, affected by
multiple vulnerabilities :

  - An elevation of privilege vulnerability exists when the
    Windows RSoP Service Application improperly handles
    memory.  (CVE-2020-0648)

  - An elevation of privilege vulnerability exists when the
    Windows Print Spooler service improperly allows
    arbitrary writing to the file system. An attacker who
    successfully exploited this vulnerability could run
    arbitrary code with elevated system privileges. An
    attacker could then install programs; view, change, or
    delete data; or create new accounts with full user
    rights.  (CVE-2020-1030)

  - A denial of service vulnerability exists in Windows DNS
    when it fails to properly handle queries. An attacker
    who successfully exploited this vulnerability could
    cause the DNS service to become nonresponsive.
    (CVE-2020-0836, CVE-2020-1228)

  - An information disclosure vulnerability exists when the
    Microsoft Windows Graphics Component improperly handles
    objects in memory. An attacker who successfully
    exploited the vulnerability could obtain information to
    further compromise the users system.  (CVE-2020-0921,
    CVE-2020-1083)

  - A remote code execution vulnerability exists when Active
    Directory integrated DNS (ADIDNS) mishandles objects in
    memory. An authenticated attacker who successfully
    exploited the vulnerability could run arbitrary code in
    the context of the Local System Account  (CVE-2020-0718,
    CVE-2020-0761)

  - An elevation of privilege vulnerability exists in
    Windows when the Win32k component fails to properly
    handle objects in memory. An attacker who successfully
    exploited this vulnerability could run arbitrary code in
    kernel mode. An attacker could then install programs;
    view, change, or delete data; or create new accounts
    with full user rights.  (CVE-2020-1245)

  - A remote code execution vulnerability exists when
    Windows Media Audio Decoder improperly handles objects.
    An attacker who successfully exploited the vulnerability
    could take control of an affected system. There are
    multiple ways an attacker could exploit the
    vulnerability, such as by convincing a user to open a
    specially crafted document, or by convincing a user to
    visit a malicious webpage. The security update addresses
    the vulnerability by correcting how Windows Media Audio
    Decoder handles objects. (CVE-2020-1508, CVE-2020-1593)

  - A remote code execution vulnerability exists when the
    Windows Jet Database Engine improperly handles objects
    in memory. An attacker who successfully exploited this
    vulnerability could execute arbitrary code on a victim
    system. An attacker could exploit this vulnerability by
    enticing a victim to open a specially crafted file. The
    update addresses the vulnerability by correcting the way
    the Windows Jet Database Engine handles objects in
    memory. (CVE-2020-1039, CVE-2020-1074)

  - An information disclosure vulnerability exists when the
    win32k component improperly provides kernel information.
    An attacker who successfully exploited the vulnerability
    could obtain information to further compromise the users
    system.  (CVE-2020-1250)

  - An elevation of privilege vulnerability exists in the
    way that the ssdpsrv.dll handles objects in memory. An
    attacker who successfully exploited the vulnerability
    could execute code with elevated permissions.
    (CVE-2020-1052)

  - An elevation of privilege vulnerability exists when the
    Windows Function Discovery SSDP Provider improperly
    handles memory.  (CVE-2020-0912)

  - An elevation of privilege vulnerability exists when the
    Windows Universal Plug and Play (UPnP) service
    improperly handles objects in memory. An attacker who
    successfully exploited this vulnerability could run
    arbitrary code with elevated system privileges. An
    attacker could then install programs; view, change, or
    delete data; or create new accounts with full user
    rights.  (CVE-2020-1598)

  - An information disclosure vulnerability exists when the
    Windows kernel improperly handles objects in memory. An
    attacker who successfully exploited this vulnerability
    could obtain information to further compromise the users
    system.  (CVE-2020-1589)

  - A remote code execution vulnerability exists in the way
    that the Windows Graphics Device Interface (GDI) handles
    objects in the memory. An attacker who successfully
    exploited this vulnerability could take control of the
    affected system. An attacker could then install
    programs; view, change, or delete data; or create new
    accounts with full user rights.  (CVE-2020-1285)

  - A denial of service vulnerability exists when Windows
    Routing Utilities improperly handles objects in memory.
    An attacker who successfully exploited the vulnerability
    could cause a target system to stop responding.
    (CVE-2020-1038)

  - A local elevation of privilege vulnerability exists in
    how splwow64.exe handles certain calls. An attacker who
    successfully exploited the vulnerability could elevate
    privileges on an affected system from low-integrity to
    medium-integrity. This vulnerability by itself does not
    allow arbitrary code execution; however, it could allow
    arbitrary code to be run if the attacker uses it in
    combination with another vulnerability (such as a remote
    code execution vulnerability or another elevation of
    privilege vulnerability) that is capable of leveraging
    the elevated privileges when code execution is
    attempted. The security update addresses the
    vulnerability by ensuring splwow64.exe properly handles
    these calls.. (CVE-2020-0790)

  - An elevation of privilege vulnerability exists when the
    Windows Cryptographic Catalog Services improperly handle
    objects in memory. An attacker who successfully
    exploited this vulnerability could modify the
    cryptographic catalog.  (CVE-2020-0782)

  - A remote code execution vulnerability exists in the way
    that Microsoft Windows Codecs Library handles objects in
    memory. An attacker who successfully exploited this
    vulnerability could take control of the affected system.
    An attacker could then install programs; view, change,
    or delete data; or create new accounts with full user
    rights. Exploitation of the vulnerability requires that
    a program process a specially crafted image file. The
    update addresses the vulnerability by correcting how
    Microsoft Windows Codecs Library handles objects in
    memory. (CVE-2020-1319)

  - An information disclosure vulnerability exists in the
    way that the Windows Server DHCP service improperly
    discloses the contents of its memory.  (CVE-2020-1031)

  - A remote code execution vulnerability exists in the way
    that Microsoft COM for Windows handles objects in
    memory. An attacker who successfully exploited the
    vulnerability could execute arbitrary code on a target
    system.  (CVE-2020-0922)

  - A information disclosure vulnerability exists when TLS
    components use weak hash algorithms. An attacker who
    successfully exploited this vulnerability could obtain
    information to further compromise a users's encrypted
    transmission channel.  (CVE-2020-1596)

  - An elevation of privilege vulnerability exists in the
    way that fdSSDP.dll handles objects in memory. An
    attacker who successfully exploited the vulnerability
    could execute code with elevated permissions.
    (CVE-2020-1376)

  - An elevation of privilege vulnerability exists when
    Windows Modules Installer improperly handles objects in
    memory. An attacker who successfully exploited this
    vulnerability could run arbitrary code in an elevated
    context. An attacker could exploit this vulnerability by
    running a specially crafted application on the victim
    system. The update addresses the vulnerability by
    correcting the way the Windows Modules Installer handles
    objects in memory. (CVE-2020-0911)

  - An information disclosure vulnerability exists when the
    Windows GDI component improperly discloses the contents
    of its memory. An attacker who successfully exploited
    the vulnerability could obtain information to further
    compromise the users system. There are multiple ways an
    attacker could exploit the vulnerability, such as by
    convincing a user to open a specially crafted document,
    or by convincing a user to visit an untrusted webpage.
    The security update addresses the vulnerability by
    correcting how the Windows GDI component handles objects
    in memory. (CVE-2020-1256)

  - An elevation of privilege vulnerability exists when the
    Windows Common Log File System (CLFS) driver improperly
    handles objects in memory. An attacker who successfully
    exploited this vulnerability could run processes in an
    elevated context.  (CVE-2020-1115)

  - A remote code execution vulnerability exists when
    Windows improperly handles objects in memory.
    (CVE-2020-1252)

  - A remote code execution vulnerability exists in the way
    that Microsoft browsers access objects in memory. The
    vulnerability could corrupt memory in a way that could
    allow an attacker to execute arbitrary code in the
    context of the current user. An attacker who
    successfully exploited the vulnerability could gain the
    same user rights as the current user.  (CVE-2020-0878)

  - An elevation of privilege vulnerability exists in the
    way that the Wininit.dll handles objects in memory. An
    attacker who successfully exploited the vulnerability
    could execute code with elevated permissions. There are
    multiple ways an attacker could exploit the
    vulnerability:  (CVE-2020-1012)

  - An elevation of privilege vulnerability exists when
    Microsoft Windows processes group policy updates. An
    attacker who successfully exploited this vulnerability
    could potentially escalate permissions or perform
    additional privileged actions on the target machine.
    (CVE-2020-1013)

  - An elevation of privilege vulnerability exists in the
    way that the Windows Function Discovery Service handles
    objects in memory. An attacker who successfully
    exploited the vulnerability could execute code with
    elevated permissions.  (CVE-2020-1491)

  - An information disclosure vulnerability exists when the
    Windows GDI component improperly discloses the contents
    of its memory. An attacker who successfully exploited
    the vulnerability could obtain information to further
    compromise a users system. There are multiple ways an
    attacker could exploit the vulnerability, such as by
    convincing a user to open a specially crafted document
    or by convincing a user to visit an untrusted webpage.
    The update addresses the vulnerability by correcting how
    the Windows GDI component handles objects in memory.
    (CVE-2020-1091, CVE-2020-1097)

  - An elevation of privilege vulnerability exists when NTFS
    improperly checks access. An attacker who successfully
    exploited this vulnerability could run processes in an
    elevated context.  (CVE-2020-0838)

  - An information disclosure vulnerability exists when
    Active Directory integrated DNS (ADIDNS) mishandles
    objects in memory. An authenticated attacker who
    successfully exploited this vulnerability would be able
    to read sensitive information about the target system.
    (CVE-2020-0664, CVE-2020-0856)

  - An elevation of privilege vulnerability exists when the
    Windows Storage Services improperly handle file
    operations. An attacker who successfully exploited this
    vulnerability could gain elevated privileges.
    (CVE-2020-1559)");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4577051/windows-7-update");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4577053/windows-7-update");
  script_set_attribute(attribute:"solution", value:
"Apply Security Only update KB4577053 or Cumulative Update KB4577051.");
  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:N/AC:L/PR:N/UI:R/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-2020-1508");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-1012");

  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:"2020/09/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/09/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/08");

  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) 2020-2024 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');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-09';
kbs = make_list(
  '4577051',
  '4577053'
);

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_2020',
                   bulletin:bulletin,
                   rollup_kb_list:[4577051, 4577053])
)
{
  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());
}