Vulnerabilities > CVE-2016-7300 - Untrusted Search Path vulnerability in Microsoft Auto Updater for mac

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
microsoft
CWE-426
nessus

Summary

Untrusted search path vulnerability in Microsoft Auto Updater for Mac allows local users to gain privileges via a Trojan horse executable file, aka "Microsoft (MAU) Office Elevation of Privilege Vulnerability."

Vulnerable Configurations

Part Description Count
Application
Microsoft
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leveraging/Manipulating Configuration File Search Paths
    This attack loads a malicious resource into a program's standard path used to bootstrap and/or provide contextual information for a program like a path variable or classpath. J2EE applications and other component based applications that are built from multiple binaries can have very long list of dependencies to execute. If one of these libraries and/or references is controllable by the attacker then application controls can be circumvented by the attacker. A standard UNIX path looks similar to this If the attacker modifies the path variable to point to a locale that includes malicious resources then the user unwittingly can execute commands on the attackers' behalf: This is a form of usurping control of the program and the attack can be done on the classpath, database resources, or any other resources built from compound parts. At runtime detection and blocking of this attack is nearly impossible, because the configuration allows execution.

Msbulletin

bulletin_idMS16-148
bulletin_url
date2016-12-13T00:00:00
impactRemote Code Execution
knowledgebase_id3204068
knowledgebase_url
severityCritical
titleSecurity Update for Microsoft Office

Nessus

NASL familyMacOS X Local Security Checks
NASL idMACOSX_MS16-148_OFFICE.NASL
descriptionThe Microsoft Office application installed on the remote macOS or Mac OS X host is missing a security update. It is, therefore, affected by multiple vulnerabilities : - An information disclosure vulnerability exists in the Graphics Device Interface (GDI) component due to improper handling of objects in memory. A local attacker can exploit this, via a specially crafted application, to circumvent the Address Space Layout Randomization (ASLR) feature and disclose sensitive memory information. (CVE-2016-7257) - Multiple remote code execution vulnerabilities exist in Microsoft Office software due to a failure to properly handle objects in memory. An unauthenticated, remote attacker can exploit these vulnerabilities by convincing a user to open a specially crafted Office file, resulting in the execution of arbitrary code in the context of the current user. (CVE-2016-7263, CVE-2016-7298) - Multiple information disclosure vulnerabilities exist in Microsoft Office software due to an out-of-bounds memory read error. An unauthenticated, remote attacker can exploit these vulnerabilities by convincing a user to open a specially crafted Office file, resulting in the disclosure of memory contents. (CVE-2016-7264, CVE-2016-7268, CVE-2016-7276, CVE-2016-7290, CVE-2016-7291) - An arbitrary command execution vulnerability exists in Microsoft Office due to improper validation of registry settings when running embedded content. An unauthenticated, remote attacker can exploit this by convincing a user to open a specially crafted document file multiple times, resulting in a bypass of security restrictions and the execution of arbitrary commands. (CVE-2016-7266) - An elevation of privilege vulnerability exists in the Microsoft AutoUpdate (MAU) application due to improper validation of updates. A local attacker can exploit this by placing a specially crafted application in a location used by the update application, resulting in the ability to execute arbitrary code in a privileged context. (CVE-2016-7300)
last seen2020-06-01
modified2020-06-02
plugin id95810
published2016-12-14
reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/95810
titleMS16-148: Security Update for Microsoft Office (3204068) (macOS)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(95810);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2016-7257",
    "CVE-2016-7263",
    "CVE-2016-7264",
    "CVE-2016-7266",
    "CVE-2016-7268",
    "CVE-2016-7276",
    "CVE-2016-7290",
    "CVE-2016-7291",
    "CVE-2016-7298",
    "CVE-2016-7300"
  );
  script_bugtraq_id(
    94662,
    94668,
    94670,
    94671,
    94672,
    94720,
    94755,
    94769,
    94784
  );
  script_xref(name:"MSFT", value:"MS16-148");
  script_xref(name:"IAVA", value:"2016-A-0345");
  script_xref(name:"MSKB", value:"3198800");
  script_xref(name:"MSKB", value:"3198808");

  script_name(english:"MS16-148: Security Update for Microsoft Office (3204068) (macOS)");
  script_summary(english:"Checks the version of Microsoft Office.");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote macOS or Mac OS X host is
affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office application installed on the remote macOS or Mac
OS X host is missing a security update. It is, therefore, affected by
multiple vulnerabilities :

  - An information disclosure vulnerability exists in the
    Graphics Device Interface (GDI) component due to
    improper handling of objects in memory. A local attacker
    can exploit this, via a specially crafted application,
    to circumvent the Address Space Layout Randomization
    (ASLR) feature and disclose sensitive memory
    information. (CVE-2016-7257)

  - Multiple remote code execution vulnerabilities exist in
    Microsoft Office software due to a failure to properly
    handle objects in memory. An unauthenticated, remote
    attacker can exploit these vulnerabilities by convincing
    a user to open a specially crafted Office file,
    resulting in the execution of arbitrary code in the
    context of the current user. (CVE-2016-7263,
    CVE-2016-7298)

  - Multiple information disclosure vulnerabilities exist in
    Microsoft Office software due to an out-of-bounds memory
    read error. An unauthenticated, remote attacker can
    exploit these vulnerabilities by convincing a user to
    open a specially crafted Office file, resulting in the
    disclosure of memory contents. (CVE-2016-7264,
    CVE-2016-7268, CVE-2016-7276, CVE-2016-7290,
    CVE-2016-7291)

  - An arbitrary command execution vulnerability exists in
    Microsoft Office due to improper validation of registry
    settings when running embedded content. An
    unauthenticated, remote attacker can exploit this by
    convincing a user to open a specially crafted document
    file multiple times, resulting in a bypass of security
    restrictions and the execution of arbitrary commands.
    (CVE-2016-7266)

  - An elevation of privilege vulnerability exists in the
    Microsoft AutoUpdate (MAU) application due to improper
    validation of updates. A local attacker can exploit this
    by placing a specially crafted application in a location
    used by the update application, resulting in the ability
    to execute arbitrary code in a privileged context.
    (CVE-2016-7300)");
  script_set_attribute(attribute:"see_also", value:"https://technet.microsoft.com/library/security/MS16-148");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Microsoft Office for Mac
2011, Microsoft Office 2016 for Mac, Microsoft Excel for Mac 2011,
Microsoft Excel 2016 for Mac, Microsoft Word for Mac 2011, Microsoft
Word 2016 for Mac, and Microsoft Auto Updater for Mac.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-7298");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/12/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/14");

  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:word_for_mac");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel_for_mac");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:auto_updater_for_mac");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_office_installed.nbin");
  script_require_keys("Host/MacOSX/Version");
  script_require_ports("installed_sw/Office for Mac 2011", "installed_sw/Microsoft Outlook", "installed_sw/Microsoft Excel", "installed_sw/Microsoft Word", "installed_sw/Microsoft PowerPoint", "installed_sw/Microsoft OneNote");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("install_func.inc");

os = get_kb_item("Host/MacOSX/Version");
if (!os) audit(AUDIT_OS_NOT, "Mac OS X");

# Office 2011
apps = make_list(
  "Office for Mac 2011",
  "Microsoft Outlook",
  "Microsoft Excel",
  "Microsoft Word",
  "Microsoft PowerPoint",
  "Microsoft OneNote"
);

report = "";

foreach app (apps)
{
  installs = get_installs(app_name:app);
  if (isnull(installs[1])) continue;
  foreach install (installs[1])
  {
    version = install['version'];
    path    = install['path'];
    app_label = app;
    if (version =~ "^14\.")
    {
      if (app !~ " for Mac 2011$") app_label += " for Mac 2011";
      fix = '14.7.1';
    }
    else
    {
      if (version =~ "^15\.") app_label += " for Mac 2016";
      fix = '15.29';
      fix_disp = '15.29 (161209)';
    }

    if (ver_compare(ver:version, fix:fix, strict:FALSE) < 0)
    {
      report +=
        '\n  Product           : ' + app_label +
        '\n  Installed version : ' + version;

      if (!empty_or_null(fix_disp))
      {
        report += '\n  Fixed version     : ' + fix_disp;
        fix_disp = '';
      }
      else report += '\n  Fixed version     : ' + fix;

      os = get_kb_item("Host/MacOSX/Version");

      if (os =~ "^Mac OS X 10\.[0-9](\.|$)" && app_label =~ " for Mac 2016$")
        report += '\n  Note              : Update will require Mac OS X 10.10.0 or later.\n';
      else report += '\n';
    }
  }
}

# Report findings.
if (!empty(report))
{
  if (report_verbosity > 0) security_hole(port:0, extra:report);
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");