Vulnerabilities > CVE-2017-8571 - Improper Input Validation vulnerability in Microsoft Outlook

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
microsoft
CWE-20
nessus
NVD
Published: 2017-08-01
Updated: 2021-08-30

Summary

Microsoft Outlook 2007 SP3, Outlook 2010 SP2, Outlook 2013 SP1, Outlook 2013 RT SP1, and Outlook 2016 as packaged in Microsoft Office allows a security feature bypass vulnerability due to the way that it handles input, aka "Microsoft Office Outlook Security Feature Bypass Vulnerability".

Vulnerable Configurations

Part Description Count
Application
Microsoft
4

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.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS17_SEP_OUTLOOK.NASL
    descriptionThe version of Microsoft Outlook installed on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists in the way that Microsoft Outlook parses specially crafted email messages. An attacker who successfully exploited the vulnerability could take control of an affected system to then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2017-0106) - A security feature bypass vulnerability exists in Microsoft Office software when it improperly handles the parsing of file formats. To exploit the vulnerability, an attacker would have to convince a user to open a specially crafted file. (CVE-2017-0204) - A remote code execution vulnerability exists when Microsoft Office improperly validates input before loading dynamic link library (DLL) files. An attacker who successfully exploited this vulnerability could take control of an affected system to then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2017-8506) - A remote code execution vulnerability exists in the way that Microsoft Outlook parses specially crafted email messages. An attacker who successfully exploited this vulnerability could take control of an affected system. (CVE-2017-8507) - A security feature bypass vulnerability exists in Microsoft Office software when it improperly handles the parsing of file formats. (CVE-2017-8508) - A security feature bypass vulnerability exists when Microsoft Office Outlook improperly handles input. An attacker who successfully exploited the vulnerability could execute arbitrary commands. (CVE-2017-8571) - An information disclosure vulnerability exists when Microsoft Outlook fails to properly validate authentication requests. (CVE-2017-8572) - A remote code execution vulnerability exists in the way that Microsoft Outlook parses specially crafted email messages. An attacker who successfully exploited the vulnerability could take control of an affected system. (CVE-2017-8663)
    last seen2020-06-01
    modified2020-06-02
    plugin id103456
    published2017-09-25
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103456
    titleSecurity Updates for Outlook (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(103456);
  script_version("1.8");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2017-0106",
    "CVE-2017-0204",
    "CVE-2017-8506",
    "CVE-2017-8507",
    "CVE-2017-8508",
    "CVE-2017-8571",
    "CVE-2017-8572",
    "CVE-2017-8663"
  );
  script_bugtraq_id(
    97413,
    97458,
    98811,
    98827,
    98828,
    99452,
    99453,
    100004
  );
  script_xref(name:"MSKB", value:"4011089");
  script_xref(name:"MSFT", value:"MS17-4011089");
  script_xref(name:"MSKB", value:"4011110");
  script_xref(name:"MSFT", value:"MS17-4011110");
  script_xref(name:"MSKB", value:"4011091");
  script_xref(name:"MSFT", value:"MS17-4011091");
  script_xref(name:"MSKB", value:"4011090");
  script_xref(name:"MSFT", value:"MS17-4011090");

  script_name(english:"Security Updates for Outlook (September 2017)");
  script_summary(english:"Checks the file versions.");

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

  - A remote code execution vulnerability exists in the
    way that Microsoft Outlook parses specially crafted
    email messages. An attacker who successfully exploited
    the vulnerability could take control of an affected
    system to then install programs; view, change, or
    delete data; or create new accounts with full user
    rights. (CVE-2017-0106)

  - A security feature bypass vulnerability exists in
    Microsoft Office software when it improperly handles the
    parsing of file formats. To exploit the vulnerability,
    an attacker would have to convince a user to open a
    specially crafted file. (CVE-2017-0204)

  - A remote code execution vulnerability exists when
    Microsoft Office improperly validates input before
    loading dynamic link library (DLL) files. An attacker
    who successfully exploited this vulnerability could take
    control of an affected system to then install programs;
    view, change, or delete data; or create new accounts
    with full user rights. (CVE-2017-8506)

  - A remote code execution vulnerability exists in the way
    that Microsoft Outlook parses specially crafted email
    messages. An attacker who successfully exploited this
    vulnerability could take control of an affected system.
   (CVE-2017-8507)

  - A security feature bypass vulnerability exists in
    Microsoft Office software when it improperly handles the
    parsing of file formats. (CVE-2017-8508)

  - A security feature bypass vulnerability exists when
    Microsoft Office Outlook improperly handles input.
    An attacker who successfully exploited the vulnerability
    could execute arbitrary commands. (CVE-2017-8571)

  - An information disclosure vulnerability exists when
    Microsoft Outlook fails to properly validate
    authentication requests. (CVE-2017-8572)

  - A remote code execution vulnerability exists in the way
    that Microsoft Outlook parses specially crafted email
    messages. An attacker who successfully exploited the 
    vulnerability could take control of an affected system.
    (CVE-2017-8663)");
  # https://support.microsoft.com/en-us/help/4011089/descriptionofthesecurityupdateforoutlook2010september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8ac9b313");
  # https://support.microsoft.com/en-us/help/4011086/descriptionofthesecurityupdateforoutlook2007september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8f4ab525");
  # https://support.microsoft.com/en-nz/help/4011110/descriptionofthesecurityupdateforoutlook2007september19-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?16a66c3d");
  # https://support.microsoft.com/en-us/help/4011091/descriptionofthesecurityupdateforoutlook2016september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e5d09682");
  # https://support.microsoft.com/en-us/help/4011090/descriptionofthesecurityupdateforoutlook2013september12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?92c027cb");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Outlook 2007, 2010, 2013,
and 2016.");
  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-2017-8663");

  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:"2017/09/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:outlook");
  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", "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 = "MS17-09";
kbs = make_list(
  '4011110', # 2007 / 12.0
  '4011089', # 2010 / 14.0
  '4011090', # 2013 / 15.0
  '4011091'  # 2016 / 16.0
);
kb16 = '4011091';

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();

######################################################################
# Outlook 2007, 2010, 2013, 2016
######################################################################
function perform_outlook_checks()
{
  local_var vuln, checks, path;
  vuln = 0;
  checks = make_array(
    "12.0", make_array("version", "12.0.6776.5000", "kb", "4011110"), # 2007
    "14.0", make_array("version", "14.0.7187.5000", "kb", "4011089"), # 2010
    "15.0", make_array("version", "15.0.4963.1000", "kb", "4011090"), # 2013
    "16.0", make_nested_list(
      make_array("version", "16.0.4588.1000", "channel", "MSI", "kb", kb16),
      make_array("version", "16.0.8326.2107", "channel", "Current", "kb", kb16),
      make_array("version", "16.0.8201.2193", "channel", "Deferred", "channel_version", "1705", "kb", kb16),
      make_array("version", "16.0.7766.2116", "channel", "Deferred", "kb", kb16),
      make_array("version", "16.0.8431.2079", "channel", "First Release for Deferred", "kb", kb16)
    )
  );
  if (hotfix_check_office_product(product:"Outlook", checks:checks, bulletin:bulletin))
    vuln += 1;

  return vuln;
}


######################################################################
# MAIN
######################################################################
vuln = perform_outlook_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');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS17_JUL_OUTLOOK.NASL
    descriptionThe Microsoft Office or Outlook application installed on the remote Windows host is missing a security update. It is, therefore, affected by multiple vulnerabilities : - A security feature bypass vulnerability exists in Microsoft Office due to improper handling of user-supplied input. An unauthenticated, remote attacker can exploit this, by convincing a user to open and interact with a specially crafted document file, to bypass security measures and execute arbitrary commands. (CVE-2017-8571) - An information disclosure vulnerability exists in Microsoft Office due to improper handling of objects in memory. An unauthenticated, remote attacker can exploit this, by convincing a user to open a specially crafted document file, to disclose the contents of memory. (CVE-2017-8572) - A remote code execution vulnerability exists in Microsoft Outlook due to improper parsing of email messages. An unauthenticated, remote attacker can exploit this, with a specially crafted email message with a malicious attachment, to execute arbitrary code in the context of the current user. (CVE-2017-8663)
    last seen2020-06-01
    modified2020-06-02
    plugin id102035
    published2017-07-28
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102035
    titleSecurity Updates for Outlook (July 2017)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(102035);
  script_version("1.8");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id("CVE-2017-8571", "CVE-2017-8572", "CVE-2017-8663");
  script_bugtraq_id(99452, 99453, 100004);
  script_xref(name:"MSKB", value:"2956078");
  script_xref(name:"MSFT", value:"MS17-2956078");
  script_xref(name:"MSKB", value:"3213643");
  script_xref(name:"MSFT", value:"MS17-3213643");
  script_xref(name:"MSKB", value:"4011052");
  script_xref(name:"MSFT", value:"MS17-4011052");
  script_xref(name:"MSKB", value:"4011078");
  script_xref(name:"MSFT", value:"MS17-4011078");

  script_name(english:"Security Updates for Outlook (July 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 vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office or Outlook application installed on the remote
Windows host is missing a security update. It is, therefore, affected
by multiple vulnerabilities :

  - A security feature bypass vulnerability exists in
    Microsoft Office due to improper handling of
    user-supplied input. An unauthenticated, remote attacker
    can exploit this, by convincing a user to open and
    interact with a specially crafted document file, to
    bypass security measures and execute arbitrary commands.
    (CVE-2017-8571)

  - An information disclosure vulnerability exists in
    Microsoft Office due to improper handling of objects in
    memory. An unauthenticated, remote attacker can exploit
    this, by convincing a user to open a specially crafted
    document file, to disclose the contents of memory.
    (CVE-2017-8572)

  - A remote code execution vulnerability exists in
    Microsoft Outlook due to improper parsing of email
    messages. An unauthenticated, remote attacker can
    exploit this, with a specially crafted email message
    with a malicious attachment, to execute arbitrary code
    in the context of the current user. (CVE-2017-8663)");
  script_set_attribute(attribute:"see_also", value:"https://portal.msrc.microsoft.com/en-us/security-guidance/summary");
  # https://blogs.technet.microsoft.com/office_sustained_engineering/2017/07/27/new-updates-are-available-for-outlook/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0a682ddf");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Outlook 2007, 2010, 2013,
and 2016.");
  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-2017-8663");

  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:"2017/07/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/07/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:outlook");
  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", "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 = "MS17-07";
kbs = make_list(
  '2956078', # Outlook 2010 SP2
  '3213643', # Outlook 2007 SP3
  '4011052', # Outlook 2016
  '4011078'  # Outlook 2013 SP1
);

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();

######################################################################
# Outlook 2007, 2010, 2013, 2016
######################################################################
function perform_outlook_checks()
{
  local_var checks, kb16;

  kb16 = "4011052";
  checks = make_array(
    "12.0", make_array("version", "12.0.6774.5000", "kb", "3213643"),
    "14.0", make_array("version", "14.0.7187.5000", "kb", "2956078"),
    "15.0", make_array("version", "15.0.4953.1001", "kb", "4011078"),
    "16.0", make_nested_list(
      make_array("sp", 0, "version", "16.0.4573.1001", "channel", "MSI", "kb", kb16),

      make_array("sp", 0, "version", "16.0.7369.2154", "channel", "Deferred", "kb", kb16),
      make_array("sp", 0, "version", "16.0.7766.2099", "channel", "Deferred", "channel_version", "1701", "kb", kb16),
      make_array("sp", 0, "version", "16.0.8201.2158", "channel", "First Release for Deferred", "kb", kb16),
      make_array("sp", 0, "version", "16.0.8326.2058", "channel", "Current", "kb", kb16)
    )
  );
  if (hotfix_check_office_product(product:"Outlook", checks:checks, bulletin:bulletin))
    vuln = TRUE;
}

######################################################################
# MAIN
######################################################################
perform_outlook_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