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
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.15 Low
EPSS
Percentile
95.9%
The Microsoft Office Viewer / Office Compatibility Products are missing security updates. It is, therefore, affected by multiple vulnerabilities :
A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker 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-2018-8375)
An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the users computer or data. (CVE-2018-8382)
An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory. An attacker who successfully exploited the vulnerability could view out of bound memory. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. The security update addresses the vulnerability by properly initializing the affected variable. (CVE-2018-8378)
#
# (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(111698);
script_version("1.5");
script_cvs_date("Date: 2019/11/04");
script_cve_id("CVE-2018-8375", "CVE-2018-8378", "CVE-2018-8382");
script_bugtraq_id(104989, 104996, 105000);
script_xref(name:"MSKB", value:"4032212");
script_xref(name:"MSKB", value:"4032213");
script_xref(name:"MSKB", value:"4092433");
script_xref(name:"MSKB", value:"4022195");
script_xref(name:"MSKB", value:"4092434");
script_xref(name:"MSFT", value:"MS18-4032212");
script_xref(name:"MSFT", value:"MS18-4032213");
script_xref(name:"MSFT", value:"MS18-4092433");
script_xref(name:"MSFT", value:"MS18-4022195");
script_xref(name:"MSFT", value:"MS18-4092434");
script_name(english:"Security Updates for Microsoft Office Viewer Products / Office Compatibility Products (August 2018)");
script_summary(english:"Checks for Microsoft security updates.");
script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office Viewer / Office Compatibility Office Products are affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The Microsoft Office Viewer / Office Compatibility Products are missing security
updates. It is, therefore, affected by multiple
vulnerabilities :
- A remote code execution vulnerability exists in
Microsoft Excel software when the software fails to
properly handle objects in memory. An attacker who
successfully exploited the vulnerability could run
arbitrary code in the context of the current user. If
the current user is logged on with administrative user
rights, an attacker 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-2018-8375)
- An information disclosure vulnerability exists when
Microsoft Excel improperly discloses the contents of its
memory. An attacker who exploited the vulnerability
could use the information to compromise the users
computer or data. (CVE-2018-8382)
- An information disclosure vulnerability exists when
Microsoft Office software reads out of bound memory due
to an uninitialized variable, which could disclose the
contents of memory. An attacker who successfully
exploited the vulnerability could view out of bound
memory. Exploitation of the vulnerability requires that
a user open a specially crafted file with an affected
version of Microsoft Office software. The security
update addresses the vulnerability by properly
initializing the affected variable. (CVE-2018-8378)");
# https://support.microsoft.com/en-us/help/4032212/description-of-the-security-update-for-microsoft-office-compatibility
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?044626c2");
# https://support.microsoft.com/en-us/help/4032213/description-of-the-security-update-for-excel-viewer-2007-august-14
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?242a4c69");
# https://support.microsoft.com/en-us/help/4092433/description-of-the-security-update-for-word-viewer-august-14-2018
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ec324acb");
# https://support.microsoft.com/en-us/help/4022195/description-of-the-security-update-for-microsoft-office-viewers-and-of
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?aa676634");
# https://support.microsoft.com/en-us/help/4092434/description-of-the-security-update-for-word-viewer-august-14-2018
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c214da08");
script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:
-KB4032212
-KB4032213
-KB4092433
-KB4022195
-KB4092434");
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:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-2018-8375");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/14");
script_set_attribute(attribute:"patch_publication_date", value:"2018/08/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/14");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word_viewer");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel_viewer");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_compatibility_pack");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows : Microsoft Bulletins");
script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("office_installed.nasl", "microsoft_office_compatibility_pack_installed.nbin", "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_func.inc");
include("smb_hotfixes.inc");
include("smb_hotfixes_fcheck.inc");
include("smb_reg_query.inc");
include("misc_func.inc");
include("install_func.inc");
global_var vuln;
get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");
bulletin = "MS18-08";
kbs = make_list(
'4032212', # Office Compatibility Pack Service Pack 3
'4022195', # Office Compatibility Pack Service Pack 3 - Excel Viewer
'4032213', # Office Excel Viewer
'4092433', # Office Word Viewer
'4092434' # Office Word Viewer
);
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", exit_code:1);
vuln = FALSE;
port = kb_smb_transport();
######################################################################
# Office Compatibility Pack
######################################################################
function perform_compatibility_checks()
{
var install, installs, path;
installs = get_kb_list("SMB/Office/ExcelCnv/*/ProductPath");
foreach install (keys(installs))
{
path = installs[install];
path = ereg_replace(pattern:'^(.+)\\\\[^\\\\]+\\.exe$', replace:"\1\", string:path, icase:TRUE);
if(hotfix_check_fversion(path:path, file:"excelcnv.exe", version:"12.0.6802.5000", kb:"4032212", min_version:"12.0.0.0", product:"Microsoft Office Compatibility Pack") == HCF_OLDER)
{
vuln = TRUE;
break;
}
}
}
######################################################################
# Excel Viewer
######################################################################
function perform_excel_viewer_checks()
{
var install, installs, path, prod, prod_exel, common_path;
prod = "Microsoft Excel Viewer and Office Compatibility Products";
prod_exel = "Microsoft Excel Viewer";
installs = get_kb_list("SMB/Office/ExcelViewer/*/ProductPath");
foreach install (keys(installs))
{
common_path = installs[install];
common_path = ereg_replace(pattern:"^([A-Za-z]:.*)\\Microsoft Office.*", replace:"\1\Common Files", string:common_path);
path = hotfix_append_path(
path : common_path,
value : "Microsoft Shared\Office12"
);
if (hotfix_check_fversion(file:"mso.dll", version:"12.0.6802.5000", path:path, kb:"4022195", product:prod) == HCF_OLDER)
vuln = TRUE;
if (hotfix_check_fversion(file:"xlview.exe", version:"12.0.6802.5000", path:path, kb:"4032213", product:prod_exel) == HCF_OLDER)
vuln = TRUE;
}
}
######################################################################
# Word Viewer
######################################################################
function perform_word_viewer_checks()
{
var install, installs, path, prod;
prod = "Microsoft Word Viewer";
installs = get_kb_list("SMB/Office/WordViewer/*/ProductPath");
foreach install (keys(installs))
{
path = installs[install];
path = ereg_replace(pattern:"^([A-Za-z]:.*)\\[wW]ordview.exe", replace:"\1", string:path);
if (hotfix_check_fversion(file:"Wordview.exe", version:"11.0.8450.0", path:path, kb:"4092433", product:prod) == HCF_OLDER)
vuln = TRUE;
if (hotfix_check_fversion(file:"Mso.dll", version:"11.0.8450.0", path:path, kb:"4092434", product:prod) == HCF_OLDER)
vuln = TRUE;
}
}
######################################################################
# MAIN
######################################################################
perform_compatibility_checks();
perform_excel_viewer_checks();
perform_word_viewer_checks();
if (vuln)
{
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, 'affected');
}
Vendor | Product | Version | CPE |
---|---|---|---|
microsoft | word_viewer | cpe:/a:microsoft:word_viewer | |
microsoft | excel_viewer | cpe:/a:microsoft:excel_viewer | |
microsoft | office_compatibility_pack | cpe:/a:microsoft:office_compatibility_pack |
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
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.15 Low
EPSS
Percentile
95.9%