Vulnerabilities > CVE-2017-8743 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Microsoft Office Online Server, Powerpoint and Sharepoint Server

047910
CVSS 9.3 - CRITICAL
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
microsoft
CWE-119
critical
nessus
NVD
Published: 2017-09-13
Updated: 2017-09-21

Summary

A remote code execution vulnerability exists in Microsoft PowerPoint 2016, Microsoft SharePoint Enterprise Server 2016, and Office Online Server when they fail to properly handle objects in memory, aka "PowerPoint Remote Code Execution Vulnerability". This CVE ID is unique from CVE-2017-8742.

Vulnerable Configurations

Part Description Count
Application
Microsoft
3

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS17_SEP_POWERPOINT.NASL
    descriptionThe Microsoft Powerpoint Products are missing security updates. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists in Microsoft Office 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. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file designed to exploit the vulnerability. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file. Note that the Preview Pane is not an attack vector for this vulnerability. The security update addresses the vulnerability by correcting how Office handles objects in memory. (CVE-2017-8742, CVE-2017-8743)
    last seen2020-06-01
    modified2020-06-02
    plugin id103136
    published2017-09-12
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103136
    titleSecurity Updates for Microsoft Powerpoint Products (September 2017)
    code
    #
# (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(103136);
  script_version("1.8");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id("CVE-2017-8742", "CVE-2017-8743");
  script_bugtraq_id(100741, 100746);
  script_xref(name:"MSKB", value:"4011041");
  script_xref(name:"MSKB", value:"3128027");
  script_xref(name:"MSKB", value:"4011069");
  script_xref(name:"MSFT", value:"MS17-3213642");
  script_xref(name:"MSFT", value:"MS17-4011041");
  script_xref(name:"MSFT", value:"MS17-3128027");
  script_xref(name:"MSFT", value:"MS17-4011069");
  script_xref(name:"IAVA", value:"2017-A-0274");

  script_name(english:"Security Updates for Microsoft Powerpoint Products (September 2017)");
  script_summary(english:"Checks for Microsoft security updates.");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Powerpoint Products are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Powerpoint Products are missing security
updates. It is, therefore, affected by multiple
vulnerabilities :

  - A remote code execution vulnerability exists in
    Microsoft Office 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. Users whose accounts are configured to have
    fewer user rights on the system could be less impacted
    than users who operate with administrative user rights.
    Exploitation of the vulnerability requires that a user
    open a specially crafted file with an affected version
    of Microsoft Office software. In an email attack
    scenario, an attacker could exploit the vulnerability by
    sending the specially crafted file to the user and
    convincing the user to open the file. In a web-based
    attack scenario, an attacker could host a website (or
    leverage a compromised website that accepts or hosts
    user-provided content) that contains a specially crafted
    file designed to exploit the vulnerability. An attacker
    would have no way to force users to visit the website.
    Instead, an attacker would have to convince users to
    click a link, typically by way of an enticement in an
    email or instant message, and then convince them to open
    the specially crafted file. Note that the Preview Pane
    is not an attack vector for this vulnerability. The
    security update addresses the vulnerability by
    correcting how Office handles objects in memory.
    (CVE-2017-8742, CVE-2017-8743)");
  # https://support.microsoft.com/en-us/help/4011041/descriptionofthesecurityupdateforpowerpoint2016september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?acec2355");
  # https://support.microsoft.com/en-us/help/3128027/descriptionofthesecurityupdateforpowerpoint2010september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8d9bf308");
  # https://support.microsoft.com/en-us/help/4011069/descriptionofthesecurityupdateforpowerpoint2013september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7e2fc194");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4011041
  -KB3128027
  -KB4011069");
  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-2017-8743");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:powerpoint");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2019 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");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS17-09";
kbs = make_list(
  '3213642', # PowerPoint 2007 SP3
  '3128027', # PowerPoint 2010 SP2
  '4011069', # PowerPoint 2013 SP1
  '4011041' # PowerPoint 2016
);


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);

port = kb_smb_transport();

vuln = FALSE;

checks = make_array(
    "12.0", make_array("sp", 3, "version", "12.0.6775.5000", "kb", "3213642"),
    "14.0", make_array("sp", 2, "version", "14.0.7188.5000", "kb", "3128027"),
    "15.0", make_array("sp", 1, "version", "15.0.4963.1000", "kb", "4011069"),
    "16.0", make_nested_list(
      make_array("sp", 0, "version", "16.0.4588.1000", "kb", "4011041", "channel", "MSI"),
      make_array("sp", 0, "version", "16.0.7766.2116", "kb", "4011041", "channel", "Deferred", "channel_version", "1701"),
      make_array("sp", 0, "version", "16.0.8201.2193", "kb", "4011041", "channel", "Deferred", "channel_version", "1705"),
      make_array("sp", 0, "version", "16.0.8431.2079", "kb", "4011041", "channel", "First Release for Deferred"),
      make_array("sp", 0, "version", "16.0.8326.2107", "kb", "4011041", "channel", "Current")
      )
    );

if(hotfix_check_office_product(product:"PowerPoint", checks:checks, bulletin:bulletin))
{
  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');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS17_SEP_OFFICE_SHAREPOINT.NASL
    descriptionThe Microsoft Sharepoint Server installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists in Microsoft Office software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user. Exploitation of this vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file. The security update addresses the vulnerability by correcting how Microsoft Office handles files in memory. (CVE-2017-8631) - A remote code execution vulnerability exists in Microsoft Office 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. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file designed to exploit the vulnerability. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file. Note that the Preview Pane is not an attack vector for this vulnerability. The security update addresses the vulnerability by correcting how Office handles objects in memory. (CVE-2017-8742, CVE-2017-8743) - An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server. The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim
    last seen2020-06-01
    modified2020-06-02
    plugin id103141
    published2017-09-12
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103141
    titleSecurity Updates for Microsoft Sharepoint Server (September 2017)
    code
    #
# (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(103141);
  script_version("1.8");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2017-8629",
    "CVE-2017-8631",
    "CVE-2017-8742",
    "CVE-2017-8743",
    "CVE-2017-8745"
  );
  script_bugtraq_id(
    100725,
    100741,
    100746,
    100751,
    100753
  );
  script_xref(name:"MSKB", value:"4011056");
  script_xref(name:"MSKB", value:"4011117");
  script_xref(name:"MSKB", value:"3213560");
  script_xref(name:"MSKB", value:"4011113");
  script_xref(name:"MSKB", value:"4011127");
  script_xref(name:"MSKB", value:"3191831");
  script_xref(name:"MSFT", value:"MS17-4011056");
  script_xref(name:"MSFT", value:"MS17-4011117");
  script_xref(name:"MSFT", value:"MS17-3213560");
  script_xref(name:"MSFT", value:"MS17-4011113");
  script_xref(name:"MSFT", value:"MS17-4011127");
  script_xref(name:"MSFT", value:"MS17-3191831");
  script_xref(name:"IAVA", value:"2017-A-0274");

  script_name(english:"Security Updates for Microsoft Sharepoint Server (September 2017)");
  script_summary(english:"Checks for Microsoft security updates.");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Sharepoint Server installation on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Sharepoint Server installation on the remote
host is missing security updates. It is, therefore, affected
by multiple vulnerabilities :

  - A remote code execution vulnerability exists in
    Microsoft Office software when it fails to properly
    handle objects in memory. An attacker who successfully
    exploited the vulnerability could use a specially
    crafted file to perform actions in the security context
    of the current user. For example, the file could then
    take actions on behalf of the logged-on user with the
    same permissions as the current user. Exploitation of
    this vulnerability requires that a user open a specially
    crafted file with an affected version of Microsoft
    Office software. In an email attack scenario, an
    attacker could exploit the vulnerability by sending the
    specially crafted file to the user and convincing the
    user to open the file. In a web-based attack scenario,
    an attacker could host a website (or leverage a
    compromised website that accepts or hosts user-provided
    content) that contains a specially crafted file that is
    designed to exploit the vulnerability. However, an
    attacker would have no way to force the user to visit
    the website. Instead, an attacker would have to convince
    the user to click a link, typically by way of an
    enticement in an email or Instant Messenger message, and
    then convince the user to open the specially crafted
    file. The security update addresses the vulnerability by
    correcting how Microsoft Office handles files in memory.
    (CVE-2017-8631)

  - A remote code execution vulnerability exists in
    Microsoft Office 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. Users whose accounts are configured to have
    fewer user rights on the system could be less impacted
    than users who operate with administrative user rights.
    Exploitation of the vulnerability requires that a user
    open a specially crafted file with an affected version
    of Microsoft Office software. In an email attack
    scenario, an attacker could exploit the vulnerability by
    sending the specially crafted file to the user and
    convincing the user to open the file. In a web-based
    attack scenario, an attacker could host a website (or
    leverage a compromised website that accepts or hosts
    user-provided content) that contains a specially crafted
    file designed to exploit the vulnerability. An attacker
    would have no way to force users to visit the website.
    Instead, an attacker would have to convince users to
    click a link, typically by way of an enticement in an
    email or instant message, and then convince them to open
    the specially crafted file. Note that the Preview Pane
    is not an attack vector for this vulnerability. The
    security update addresses the vulnerability by
    correcting how Office handles objects in memory.
    (CVE-2017-8742, CVE-2017-8743)

  - An elevation of privilege vulnerability exists when
    Microsoft SharePoint Server does not properly sanitize a
    specially crafted web request to an affected SharePoint
    server. An authenticated attacker could exploit the
    vulnerability by sending a specially crafted request to
    an affected SharePoint server. The attacker who
    successfully exploited the vulnerability could then
    perform cross-site scripting attacks on affected systems
    and run script in the security context of the current
    user. These attacks could allow the attacker to read
    content that the attacker is not authorized to read, use
    the victim's identity to take actions on the SharePoint
    site on behalf of the user, such as change permissions
    and delete content, and inject malicious content in the
    browser of the user. The security update addresses the
    vulnerability by helping to ensure that SharePoint
    Server properly sanitizes web requests. (CVE-2017-8629)

  - A cross-site scripting (XSS) vulnerability exists when
    Microsoft SharePoint Server does not properly sanitize a
    specially crafted web request to an affected SharePoint
    server. An authenticated attacker could exploit the
    vulnerability by sending a specially crafted request to
    an affected SharePoint server. The attacker who
    successfully exploited the vulnerability could then
    perform cross-site scripting attacks on affected systems
    and run script in the security context of the current
    user. The attacks could allow the attacker to read
    content that the attacker is not authorized to read, use
    the victim's identity to take actions on the SharePoint
    site on behalf of the user, such as change permissions
    and delete content, and inject malicious content in the
    browser of the user. The security update addresses the
    vulnerability by helping to ensure that SharePoint
    Server properly sanitizes web requests. (CVE-2017-8745)");
  # https://support.microsoft.com/en-us/help/4011056/descriptionofthesecurityupdateforsharepointserver2010september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?604636cb");
  # https://support.microsoft.com/en-us/help/4011117/descriptionofthesecurityupdateforsharepointfoundation2013september12-2
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a44abe21");
  # https://support.microsoft.com/en-us/help/3213560/descriptionofthesecurityupdateforsharepointserver2013september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?af7fb55b");
  # https://support.microsoft.com/en-us/help/4011113/descriptionofthesecurityupdateforsharepointserver2013september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d79043bd");
  # https://support.microsoft.com/en-us/help/4011127/descriptionofthesecurityupdateforsharepointserver2016september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5cbef33e");
  # https://support.microsoft.com/en-us/help/3191831/descriptionofthesecurityupdateforsharepointserver2007september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?eb6ab180");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4011056
  -KB4011117
  -KB3213560
  -KB4011113
  -KB4011127
  -KB3191831");
  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-2017-8743");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sharepoint");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("microsoft_sharepoint_installed.nbin", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl", "microsoft_office_compatibility_pack_installed.nbin");
  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");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS17-09";
kbs = make_list(
  '3191831', # Excel Services for SharePoint Server 2007 SP3
  '4011056', # Excel Services for SharePoint Server 2010 SP2
  '3213560', # SharePoint Server 2013 SP1
  '4011113', # SharePoint Server 2013 SP1
  '4011117', # SharePoint Foundation 2013 SP1
  '4011127' # SharePoint Enterprise Server 2016
);

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);

# Get path information for Windows.
windir = hotfix_get_systemroot();
if (isnull(windir)) exit(1, "Failed to determine the location of %windir%.");

registry_init();

var sps_2007_path, sps_2007_sp, sps_2007_edition;
var sps_2010_path, sps_2010_sp, sps_2010_edition;
var sps_2013_path, sps_2013_sp, sps_2013_edition;
var sps_2016_path, sps_2016_sp, sps_2016_edition;

xss = FALSE;
vuln = FALSE;
port = kb_smb_transport();

installs = get_installs(app_name:"Microsoft SharePoint Server", exit_if_not_found:TRUE);

foreach install (installs[1])
{
  if (install["Product"] == "2007")
  {
    sps_2007_path = install['path'];
    sps_2007_sp = install['SP'];
    sps_2007_edition = install['Edition'];
  }
  else if (install["Product"] == "2010")
  {
    sps_2010_path = install['path'];
    sps_2010_sp = install['SP'];
    sps_2010_edition = install['Edition'];
  }
  else if (install["Product"] == "2016")
  {
    sps_2016_path = install['path'];
    sps_2016_sp = install['SP'];
    sps_2016_edition = install['Edition'];
  }
  else if (install["Product"] == "2013")
  {
    sps_2013_path = install['path'];
    sps_2013_sp = install['SP'];
    sps_2013_edition = install['Edition'];
  }

}


######################################################################
# SharePoint Server 2007 SP3
######################################################################
if (sps_2007_path && sps_2007_sp == "3" && sps_2007_edition == "Server")
{
  path = hotfix_append_path(path:sps_2007_path, value:"Bin");
  if (hotfix_check_fversion(file:"xlsrv.dll", version:"12.0.6776.5000", min_version:"12.0.0.0", path:path, kb:"3191831", product:"Excel Services for SharePoint Server 2007 SP3") == HCF_OLDER)
    {
      vuln = TRUE;
    }

}

######################################################################
# SharePoint Server 2010 SP2
######################################################################
if (sps_2010_path && sps_2010_sp == "2" && sps_2010_edition == "Server")
{
    path = hotfix_append_path(path:sps_2010_path, value:"Bin");
    if (hotfix_check_fversion(file:"xlsrv.dll", version:"14.0.7188.5000", min_version:"14.0.0.0", path:path, kb:"4011056", product:"Excel Services for SharePoint Server 2010 SP2") == HCF_OLDER)
      vuln = TRUE;
}

######################################################################
# Sharepoint Server 2013 SP1
######################################################################
if (sps_2013_path && sps_2013_sp == "1")
{
  if(sps_2013_edition == "Server")
  {
    path = hotfix_append_path(path:sps_2013_path, value:"WebServices\ConversionServices");
    if (hotfix_check_fversion(file:"ppserver.dll", version:"15.0.4961.1000", min_version:"15.0.0.0", path:path, kb:"3213560", product:"Microsoft SharePoint Server 2013 Service Pack 1 ") == HCF_OLDER)
      vuln = TRUE;

    if (hotfix_check_fversion(file:"htmlutil.dll", version:"15.0.4936.1000", min_version:"15.0.0.0", path:path, kb:"4011113", product:"Microsoft SharePoint Server 2013 Service Pack 1") == HCF_OLDER)
    {
      vuln = TRUE;
      xss  = TRUE;
    }
  }

  if(sps_2013_edition == "Foundation")
  {
    commonfiles = hotfix_get_commonfilesdir();
    if (!commonfiles) commonfiles = hotfix_get_commonfilesdirx86();

    if(commonfiles) path = hotfix_append_path(path:commonfiles, value:"Microsoft Shared\Web Server Extensions\15\BIN");
    else path = hotfix_append_path(path:sps_2013_path, value:"BIN");
    if (hotfix_check_fversion(file:"onetutil.dll", version:"15.0.4963.1000", min_version:"15.0.0.0", path:path, kb:"4011117", product:"Microsoft Sharepoint Foundation 2013 Service Pack 1") == HCF_OLDER)
    {
      vuln = TRUE;
      xss  = TRUE;
    }
  }
}
######################################################################
# SharePoint Server 2016
######################################################################
if (sps_2016_path && sps_2016_sp == "0" && sps_2016_edition == "Server")
{
  path = hotfix_append_path(path:sps_2016_path, value:"WebServices\ConversionServices");
  if (hotfix_check_fversion(file:"sword.dll", version:"16.0.4588.1000", min_version:"16.0.0.0", path:path, kb:"4011127", product:"Microsoft SharePoint Server 2016") == HCF_OLDER)
    vuln = TRUE;
}



if (vuln)
{
  if(xss) replace_kb_item(name:'www/'+port+'/XSS', value:TRUE);

  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');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS17_SEP_OFFICE_WEB.NASL
    descriptionThe Microsoft Office Online Server or Microsoft Office Web Apps installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists in Microsoft Office software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user. Exploitation of this vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file. The security update addresses the vulnerability by correcting how Microsoft Office handles files in memory. (CVE-2017-8631) - A remote code execution vulnerability exists in Microsoft Office 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. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file designed to exploit the vulnerability. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file. Note that the Preview Pane is not an attack vector for this vulnerability. The security update addresses the vulnerability by correcting how Office handles objects in memory. (CVE-2017-8742, CVE-2017-8743) - A remote code execution vulnerability exists due to the way Windows Uniscribe 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. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. There are multiple ways an attacker could exploit this vulnerability: In a web-based attack scenario, an attacker could host a specially crafted website designed to exploit this vulnerability and then convince a user to view the website. An attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically by getting them to click a link in an email or instant message that takes users to the attacker
    last seen2020-06-01
    modified2020-06-02
    plugin id103192
    published2017-09-13
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103192
    titleSecurity Update for Microsoft Office Online Server and Office Web Apps (September 2017)
    code
    #
# (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(103192);
  script_version("1.9");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2017-8631",
    "CVE-2017-8696",
    "CVE-2017-8742",
    "CVE-2017-8743"
  );
  script_bugtraq_id(
    100741,
    100746,
    100751,
    100780
  );
  script_xref(name:"MSKB", value:"3213562");
  script_xref(name:"MSFT", value:"MS17-3213562");
  script_xref(name:"MSKB", value:"3213632");
  script_xref(name:"MSFT", value:"MS17-3213632");
  script_xref(name:"MSKB", value:"3213658");
  script_xref(name:"MSFT", value:"MS17-3213658");
  script_xref(name:"IAVA", value:"2017-A-0274");

  script_name(english:"Security Update for Microsoft Office Online Server and Office Web Apps (September 2017)");
  script_summary(english:"Checks the file versions.");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote Windows host is affected by
multiple remote code execution vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office Online Server or Microsoft Office Web
Apps installation on the remote host is missing security
updates. It is, therefore, affected by multiple
vulnerabilities :

  - A remote code execution vulnerability exists in
    Microsoft Office software when it fails to properly
    handle objects in memory. An attacker who successfully
    exploited the vulnerability could use a specially
    crafted file to perform actions in the security context
    of the current user. For example, the file could then
    take actions on behalf of the logged-on user with the
    same permissions as the current user. Exploitation of
    this vulnerability requires that a user open a specially
    crafted file with an affected version of Microsoft
    Office software. In an email attack scenario, an
    attacker could exploit the vulnerability by sending the
    specially crafted file to the user and convincing the
    user to open the file. In a web-based attack scenario,
    an attacker could host a website (or leverage a
    compromised website that accepts or hosts user-provided
    content) that contains a specially crafted file that is
    designed to exploit the vulnerability. However, an
    attacker would have no way to force the user to visit
    the website. Instead, an attacker would have to convince
    the user to click a link, typically by way of an
    enticement in an email or Instant Messenger message, and
    then convince the user to open the specially crafted
    file. The security update addresses the vulnerability by
    correcting how Microsoft Office handles files in memory.
    (CVE-2017-8631)

  - A remote code execution vulnerability exists in
    Microsoft Office 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. Users whose accounts are configured to have
    fewer user rights on the system could be less impacted
    than users who operate with administrative user rights.
    Exploitation of the vulnerability requires that a user
    open a specially crafted file with an affected version
    of Microsoft Office software. In an email attack
    scenario, an attacker could exploit the vulnerability by
    sending the specially crafted file to the user and
    convincing the user to open the file. In a web-based
    attack scenario, an attacker could host a website (or
    leverage a compromised website that accepts or hosts
    user-provided content) that contains a specially crafted
    file designed to exploit the vulnerability. An attacker
    would have no way to force users to visit the website.
    Instead, an attacker would have to convince users to
    click a link, typically by way of an enticement in an
    email or instant message, and then convince them to open
    the specially crafted file. Note that the Preview Pane
    is not an attack vector for this vulnerability. The
    security update addresses the vulnerability by
    correcting how Office handles objects in memory.
    (CVE-2017-8742, CVE-2017-8743)

  - A remote code execution vulnerability exists due to the
    way Windows Uniscribe 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.
    Users whose accounts are configured to have fewer user
    rights on the system could be less impacted than users
    who operate with administrative user rights. There are
    multiple ways an attacker could exploit this
    vulnerability: In a web-based attack scenario, an
    attacker could host a specially crafted website designed
    to exploit this vulnerability and then convince a user
    to view the website. An attacker would have no way to
    force users to view the attacker-controlled content.
    Instead, an attacker would have to convince users to
    take action, typically by getting them to click a link
    in an email or instant message that takes users to the
    attacker's website, or by opening an attachment sent
    through email. In a file-sharing attack scenario, an
    attacker could provide a specially crafted document file
    designed to exploit this vulnerability and then convince
    a user to open the document file.The security update
    addresses the vulnerability by correcting how Windows
    Uniscribe handles objects in memory. (CVE-2017-8696)");
  # https://support.microsoft.com/en-us/help/3213658/descriptionofthesecurityupdateforofficeonlineserverseptember12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8f1bdca6");
  # https://support.microsoft.com/en-us/help/3213632/descriptionofthesecurityupdateforsharepointserver2010officewebappssept
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ab979819");
  # https://support.microsoft.com/en-us/help/3213562/descriptionofthesecurityupdateforofficewebappsserver2013september12-20
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?75d14528");
  script_set_attribute(attribute:"see_also", value:"https://portal.msrc.microsoft.com/en-us/security-guidance/summary");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Microsoft Office Online
Server, Office Web Apps Server 2013, Office 2010 Web Apps, and Office
2013 Web Apps.");
  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-2017-8743");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_web_apps");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_online_server");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("office_installed.nasl", "microsoft_owa_installed.nbin", "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");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS17-09";
kbs = make_list(
  "3213562",
  "3213632",
  "3213658"
);

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);

registry_init();
hklm = registry_hive_connect(hive:HKEY_LOCAL_MACHINE, exit_on_fail:TRUE);
global_var office_online_server_path = get_registry_value(
  handle : hklm,
  item   : "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Office16.WacServer\InstallLocation"
);
RegCloseKey(handle:hklm);
close_registry(close:FALSE);

port = kb_smb_transport();

######################################################################
# Office Web Apps 2010, 2013
######################################################################
function perform_owa_checks()
{
  var owa_installs, owa_install;
  var owa_2010_path, owa_2010_sp;
  var owa_2013_path, owa_2013_sp;
  var path;
  var vuln;

  # Get installs of Office Web Apps
  owa_installs = get_installs(app_name:"Microsoft Office Web Apps");
  if (!empty_or_null(owa_installs))
  {
    foreach owa_install (owa_installs[1])
    {
      if (owa_install["Product"] == "2010")
      {
        owa_2010_path = owa_install["path"];
        owa_2010_sp = owa_install["SP"];
      }
      else if (owa_install["Product"] == "2013")
      {
        owa_2013_path = owa_install["path"];
        owa_2013_sp = owa_install["SP"];
      }
    }
  }

  ####################################################################
  # Office Web Apps 2010 SP2
  ####################################################################
  if (owa_2010_path && (!isnull(owa_2010_sp) && owa_2010_sp == "2"))
  {
    path = hotfix_append_path(path:owa_2010_path, value:"14.0\WebServices\WordServer\Core");
    if (hotfix_check_fversion(file:"msoserver.dll", version:"14.0.7188.5000", min_version:"14.0.0.0", path:path, kb:"3213632", product:"Office Web Apps 2010") == HCF_OLDER)

      vuln = TRUE;
  }

  ####################################################################
  # Office Web Apps 2013 SP1
  ####################################################################
  if (owa_2013_path && (!isnull(owa_2013_sp) && owa_2013_sp == "1"))
  {
    path = hotfix_append_path(path:owa_2013_path, value:"WordConversionService\bin\Converter");
    if (hotfix_check_fversion(file:"sword.dll", version:"15.0.4963.1000", min_version:"15.0.4569.1500", path:path, kb:"3213562", product:"Office Web Apps 2013") == HCF_OLDER)

      vuln = TRUE;
  }
  return vuln;
}


######################################################################
# Office Online Server
######################################################################
function perform_oos_checks()
{
  var vuln, path;

  if (office_online_server_path)
  {
    path = hotfix_append_path(path:office_online_server_path, value:"WordConversionService\bin\Converter");
    if (hotfix_check_fversion(file:"sword.dll", version:"16.0.7726.1056", min_version:"16.0.6000.0", path:path, kb:"3213658", product:"Office Online Server") == HCF_OLDER)

      vuln = TRUE;
  }
  return vuln;
}

global_var vuln = 0;
vuln += perform_owa_checks();
vuln += perform_oos_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');
}

References