Vulnerabilities > CVE-2020-1229 - Information Exposure vulnerability in Microsoft 365 Apps, Office and Word

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
microsoft
CWE-200
nessus
NVD
Published: 2020-06-09
Updated: 2021-07-21

Summary

A security feature bypass vulnerability exists in Microsoft Outlook when Office fails to enforce security settings configured on a system, aka 'Microsoft Outlook Security Feature Bypass Vulnerability'.

Vulnerable Configurations

Part Description Count
Application
Microsoft
12

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_JUN_WORD.NASL
    descriptionThe Microsoft Word Products is missing a security update, and Therefore is affected by a security feature bypass vulnerability. An attacker who exploited this vulnerability could cause a system to load remote images which could disclose the IP address of the targeted system to the attacker.
    last seen2020-06-13
    modified2020-06-09
    plugin id137272
    published2020-06-09
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/137272
    titleSecurity Feature Bypass Vulnerability for Word (June 2020)
    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(137272);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/17");

  script_cve_id("CVE-2020-1229");
  script_xref(name:"MSKB", value:"4484380");
  script_xref(name:"MSKB", value:"4484396");
  script_xref(name:"MSKB", value:"4484361");
  script_xref(name:"MSFT", value:"MS20-4484380");
  script_xref(name:"MSFT", value:"MS20-4484396");
  script_xref(name:"MSFT", value:"MS20-4484361");
  script_xref(name:"IAVA", value:"2020-A-0255");

  script_name(english:"Security Feature Bypass Vulnerability for Word (June 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Word Products are affected by security feature bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Word Products is missing a security update, and Therefore is affected by 
a security feature bypass vulnerability. An attacker who exploited this vulnerability 
could cause a system to load remote images which could disclose the IP address of the 
targeted system to the attacker.");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484380");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484396");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484361");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4484380
  -KB4484396
  -KB4484361

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic updates are enabled or open any office app and 
manually perform an update.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1229");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  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) 2020 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('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 = 'MS20-06';
kbs = make_list(
  '4484380',
  '4484396',
  '4484361'
);

if (get_kb_item('Host/patch_management_checks'))
  hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_WARNING);

get_kb_item_or_exit('SMB/Registry/Enumerated', exit_code:1);

port = kb_smb_transport();

checks = make_array(

  '14.0', make_array('sp', 2, 'version', '14.0.7252.5000', 'kb', '4484380'),
  '15.0', make_array('sp', 1, 'version', '15.0.5249.1000', 'kb', '4484361'),
  '16.0', make_nested_list(make_array('sp', 0, 'version', '16.0.5017.1000', 'channel', 'MSI', 'kb', '4484396'),
    # C2R
    make_array('version', '16.0.11328.20602', 'channel', 'Deferred'),
    make_array('version', '16.0.11929.20838', 'channel', 'Deferred', 'channel_version', '1908'),
    make_array('version', '16.0.12527.20720', 'channel', 'First Release for Deferred'),
    make_array('version', '16.0.12827.20336', 'channel', 'Current'),
    # 2019
    make_array('version', '16.0.12827.20336', 'channel', '2019 Retail'),
    make_array('version', '16.0.10361.20002', 'channel', '2019 Volume')
    )
  );

if (hotfix_check_office_product(product:'Word', checks:checks, bulletin:bulletin))
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_warning();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_JUN_OFFICE.NASL
    descriptionThe Microsoft Office Products are missing a security update. It is, therefore, affected by the following vulnerability : - A security feature bypass vulnerability exists in Microsoft Outlook when Office fails to enforce security settings configured on a system. An attacker who successfully exploited this vulnerability could cause a system to load remote images. These images could disclose the IP address of the targeted system to the attacker. Exploitation of the vulnerability requires that a user open a specially crafted image with an affected version of Microsoft Office software. (CVE-2020-1229)
    last seen2020-06-13
    modified2020-06-09
    plugin id137267
    published2020-06-09
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/137267
    titleSecurity Updates for Microsoft Office Products (June 2020)
    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(137267);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/17");

  script_cve_id("CVE-2020-1229");
  script_xref(name:"MSKB", value:"4484342");
  script_xref(name:"MSKB", value:"4484351");
  script_xref(name:"MSKB", value:"4484373");
  script_xref(name:"MSKB", value:"4484378");
  script_xref(name:"MSFT", value:"MS20-4484342");
  script_xref(name:"MSFT", value:"MS20-4484351");
  script_xref(name:"MSFT", value:"MS20-4484373");
  script_xref(name:"MSFT", value:"MS20-4484378");
  script_xref(name:"IAVA", value:"2020-A-0255");

  script_name(english:"Security Updates for Microsoft Office Products (June 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office Products are missing a security update.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office Products are missing a security update.
It is, therefore, affected by the following vulnerability :

  - A security feature bypass vulnerability exists in
    Microsoft Outlook when Office fails to enforce security
    settings configured on a system. An attacker who
    successfully exploited this vulnerability could cause a
    system to load remote images. These images could
    disclose the IP address of the targeted system to the
    attacker. Exploitation of the vulnerability requires
    that a user open a specially crafted image with an
    affected version of Microsoft Office software.
    (CVE-2020-1229)");
  # https://support.microsoft.com/en-us/help/4484378/security-update-for-office-2010-june-9-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b4dcb740");
  # https://support.microsoft.com/en-us/help/4484373/security-update-for-office-2010-june-9-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?89263810");
  # https://support.microsoft.com/en-us/help/4484342/security-update-for-office-2016-june-9-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c31ba927");
  # https://support.microsoft.com/en-us/help/4484351/security-update-for-office-2013-june-9-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?de8b10ec");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4484342
  -KB4484351
  -KB4484373
  -KB4484378");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1229");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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) 2020 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('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 = 'MS20-06';
kbs = make_list(
  '4484342',
  '4484351',
  '4484373',
  '4484378'
);

if (get_kb_item('Host/patch_management_checks'))
  hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_WARNING);

get_kb_item_or_exit('SMB/Registry/Enumerated', exit_code:1);

vuln = FALSE;
port = kb_smb_transport();

office_vers = hotfix_check_office_version();

# Office 2010 SP2
if (office_vers['14.0'])
{
  office_sp = get_kb_item('SMB/Office/2010/SP');
  if (!isnull(office_sp) && office_sp == 2)
  {
    prod = 'Microsoft Office 2010 SP2';
    path = hotfix_get_officecommonfilesdir(officever:'14.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\Office14');

    if (
      hotfix_check_fversion(file:'mso.dll', version:'14.0.7252.5000', path:path, kb:'4484373', bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'wwlibcxm.dll', version:'14.0.7252.5000', path:path, kb:'4484378', bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;
  }
}

# Office 2013 SP1
if (office_vers['15.0'])
{
  office_sp = get_kb_item('SMB/Office/2013/SP');
  if (!isnull(office_sp) && office_sp == 1)
  {
    prod = 'Microsoft Office 2013 SP1';
    path = hotfix_get_officecommonfilesdir(officever:'15.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\Office15');
    kb = '4484351';
    file = 'mso.dll';
    version = '15.0.5249.1001';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER )
      vuln = TRUE;
  }
}

# Office 2016
if (office_vers['16.0'])
{
  office_sp = get_kb_item('SMB/Office/2016/SP');
  if (!isnull(office_sp) && office_sp == 0)
  {
    prod = 'Microsoft Office 2016';
    path = hotfix_get_officecommonfilesdir(officever:'16.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\Office16');
    kb = '4484342';
    file = 'mso.dll';
    version = '16.0.5017.1000';
    if (hotfix_check_fversion(file:file, version:version, channel:'MSI', channel_product:'Office', path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    prod2019 = 'Microsoft Office 2019';
    path = hotfix_get_officeprogramfilesdir(officever:'16.0');
    path = hotfix_append_path(path:path, value:'Microsoft Office\\root\\Office16');

    if (
      hotfix_check_fversion(file:'graph.exe', version:'16.0.11328.20602', channel:'Deferred', channel_product:'Office', path:path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.11929.20838', channel:'Deferred', channel_version:'1908', channel_product:'Office', path:path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12527.20720', channel:'First Release for Deferred', channel_product:'Office', path:path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12827.20336', channel:'Current', channel_product:'Office', path:path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      # 2019
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12827.20336', channel:'2019 Retail', channel_product:'Office', path:path, bulletin:bulletin, product:prod2019) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.10361.20002', channel:'2019 Volume', channel_product:'Office', path:path, bulletin:bulletin, product:prod2019) == HCF_OLDER
    )
    vuln = TRUE;
  }
}

if (vuln)
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_warning();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}

The Hacker News

idTHN:882595A940E5AB15E8B9C472154ACA45
last seen2020-06-10
modified2020-06-10
published2020-06-09
reporterThe Hacker News
sourcehttps://thehackernews.com/2020/06/windows-update-june.html
titleMicrosoft Releases June 2020 Security Patches For 129 Vulnerabilities

References