Vulnerabilities > CVE-2015-6177 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Microsoft Excel, Excel Viewer and Office Compatibility Pack

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: 2015-12-09
Updated: 2018-10-12

Summary

Microsoft Excel 2007 SP3, Office Compatibility Pack SP3, and Excel Viewer allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

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.

Msbulletin

bulletin_idMS15-131
bulletin_url
date2015-12-08T00:00:00
impactRemote Code Execution
knowledgebase_id3116111
knowledgebase_url
severityCritical
titleSecurity Update for Microsoft Office to Address Remote Code Execution

Nessus

NASL familyWindows : Microsoft Bulletins
NASL idSMB_NT_MS15-131.NASL
descriptionThe remote Windows host has a version of Microsoft Office, Word, Word Viewer, Excel, Excel Viewer, or Microsoft Office Compatibility Pack installed that is affected by multiple remote code execution vulnerabilities : - Multiple memory corruption issues exist due to improper handling of objects in memory. A remote attacker can exploit these issues by convincing a user to open a specially crafted file in an affected version of Office, resulting in the execution of arbitrary code in the context of the current user. (CVE-2015-6040, CVE-2015-6118, CVE-2015-6122, CVE-2015-6124, CVE-2015-6177) - A remote code execution vulnerability exists due to improper parsing of email messages. A remote attacker can exploit this vulnerability by convincing a user to open or preview a specially crafted email message, resulting in the execution of arbitrary code in the context of the current user. (CVE-2015-6172)
last seen2020-06-01
modified2020-06-02
plugin id87260
published2015-12-08
reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/87260
titleMS15-131: Security Update for Microsoft Office to Address Remote Code Execution (3116111)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(87260);
  script_version("1.12");
  script_cvs_date("Date: 2018/08/03 11:35:09");

  script_cve_id(
    "CVE-2015-6040",
    "CVE-2015-6118",
    "CVE-2015-6122",
    "CVE-2015-6124",
    "CVE-2015-6172",
    "CVE-2015-6177"
  );
  script_bugtraq_id(
    78543,
    78546,
    78547,
    78548,
    78549,
    78550
  );
  script_xref(name:"MSFT", value:"MS15-131");
  script_xref(name:"MSKB", value:"3085528");
  script_xref(name:"MSKB", value:"3085549");
  script_xref(name:"MSKB", value:"3101532");
  script_xref(name:"MSKB", value:"3114342");
  script_xref(name:"MSKB", value:"3114382");
  script_xref(name:"MSKB", value:"3114403");
  script_xref(name:"MSKB", value:"3114415");
  script_xref(name:"MSKB", value:"3114422");
  script_xref(name:"MSKB", value:"3114425");
  script_xref(name:"MSKB", value:"3114431");
  script_xref(name:"MSKB", value:"3114433");
  script_xref(name:"MSKB", value:"3114457");
  script_xref(name:"MSKB", value:"3114458");
  script_xref(name:"MSKB", value:"3114479");
  script_xref(name:"IAVA", value:"2015-A-0300");

  script_name(english:"MS15-131: Security Update for Microsoft Office to Address Remote Code Execution (3116111)");
  script_summary(english:"Checks the Office, SharePoint, and OWA versions.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by multiple remote code execution
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote Windows host has a version of Microsoft Office, Word, Word
Viewer, Excel, Excel Viewer, or Microsoft Office Compatibility Pack
installed that is affected by multiple remote code execution
vulnerabilities :

  - Multiple memory corruption issues exist due to improper
    handling of objects in memory. A remote attacker can
    exploit these issues by convincing a user to open a
    specially crafted file in an affected version of Office,
    resulting in the execution of arbitrary code in the
    context of the current user. (CVE-2015-6040,
    CVE-2015-6118, CVE-2015-6122, CVE-2015-6124,
    CVE-2015-6177)

  - A remote code execution vulnerability exists due to
    improper parsing of email messages. A remote attacker
    can exploit this vulnerability by convincing a user to
    open or preview a specially crafted email message,
    resulting in the execution of arbitrary code in the
    context of the current user. (CVE-2015-6172)");
  script_set_attribute(attribute:"see_also", value:"https://technet.microsoft.com/library/security/ms15-131");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Office 2007, 2010, 2013,
2013 RT, 2016, Word, Word Viewer, Excel, Excel Viewer, and Microsoft
Office Compatibility Pack.");
  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_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:"2015/12/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/12/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/12/08");

  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");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word_viewer");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel_viewer");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_compatibility_pack");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2015-2018 Tenable Network Security, Inc.");

  script_dependencies("office_installed.nasl", "microsoft_owa_installed.nbin" , "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

include("audit.inc");
include("smb_func.inc");
include("smb_hotfixes.inc");
include("smb_hotfixes_fcheck.inc");
include("smb_reg_query.inc");
include("misc_func.inc");
include("install_func.inc");

global_var bulletin, vuln;

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = 'MS15-131';
kbs = make_list(
  3085528,  # Office 2010 SP2
  3085549,  # Office 2007 SP3
  3101532,  # Office 2010 SP2
  3114342,  # Office 2013 SP1 / RT SP1
  3114382,  # Office 2016
  3114403,  # Office 2010 SP2
  3114415,  # Office 2010 SP2
  3114422,  # Office 2007 SP3
  3114425,  # Office 2007 SP3
  3114431,  # Office Compatibility Pack SP3
  3114433,  # Excel Viewer
  3114457,  # Office Compatibility Pack SP3
  3114458,  # Office 2007 SP3
  3114479   # Word Viewer
);

if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE);

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

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

# Generic Office Checks
function perform_office_checks()
{
  local_var office_vers, office_sp, path;
  office_vers = hotfix_check_office_version();
  if (office_vers["12.0"])
  {
    office_sp = get_kb_item("SMB/Office/2007/SP");
    if (!isnull(office_sp) && office_sp == 3)
    {
      path = hotfix_append_path(path:hotfix_get_officecommonfilesdir(officever:"12.0"), value:"Microsoft Shared\Office12");
      if (
        hotfix_check_fversion(file:"mso.dll",       version: "12.0.6739.5000" , path:path, bulletin:bulletin, kb:"3114425", product:"Microsoft Office 2007 SP3") == HCF_OLDER ||
        hotfix_check_fversion(file:"msptls.dll",    version: "12.0.6739.5000" , path:path, bulletin:bulletin, kb:"3085549", product:"Microsoft Office 2007 SP3") == HCF_OLDER
      )
        vuln = TRUE;
    }
  }

  if (office_vers["14.0"])
  {
    office_sp = get_kb_item("SMB/Office/2010/SP");
    if (!isnull(office_sp) && office_sp == 2)
    {
      path = hotfix_append_path(path:hotfix_get_officeprogramfilesdir(officever:"14.0"), value:"Microsoft Office\Office14");
      if (
        hotfix_check_fversion(file:"msptls.dll",   version: "14.0.7164.5000", path:path, bulletin:bulletin, kb:"3085528", product:"Microsoft Office 2010 SP2") == HCF_OLDER ||
        hotfix_check_fversion(file:"wwlibcxm.dll", version: "14.0.7164.5001", path:path, bulletin:bulletin, kb:"3114403", product:"Microsoft Office 2010 SP2") == HCF_OLDER
      )
        vuln = TRUE;
    }
  }
}

function perform_office_product_checks()
{
  local_var excel_checks, word_checks, word_vwr_checks, vwr_checks, compat_checks;

  local_var installs, install, path; # For DLL checks

  ######################################################################
  # Excel Checks
  ######################################################################
  excel_checks = make_array(
    "12.0", make_array("sp", 3, "version", "12.0.6739.5000", "kb", "3114422"),
    "14.0", make_array("sp", 2, "version", "14.0.7164.5000", "kb", "3114415")
  );
  if (hotfix_check_office_product(product:"Excel", checks:excel_checks, bulletin:bulletin))
    vuln = TRUE;

  ######################################################################
  # Word
  ######################################################################
  word_checks = make_array(
    "12.0", make_array("sp", 3, "version", "12.0.6740.5000", "kb", "3114458"),
    "14.0", make_array("sp", 2, "version", "14.0.7164.5001", "kb", "3101532"),
    "15.0", make_array("sp", 1, "version", "15.0.4779.1001", "kb", "3114342"),
    "16.0", make_nested_list(
       make_array("sp", 0, "version", "16.0.4312.1001", "channel", "MSI", "kb", "3114382"),
       make_array("sp", 0, "version", "16.0.6001.1043", "channel", "Current", "kb", "3114382")
    )
  );
  if (hotfix_check_office_product(product:"Word", checks:word_checks, bulletin:bulletin))
    vuln = TRUE;

  ######################################################################
  # Word Viewer  KB: 3114479
  ######################################################################
  installs = get_kb_list("SMB/Office/WordViewer/*/ProductPath");
  if(!isnull(installs))
  {
    word_vwr_checks = make_array(
      "11.0", make_array("version", "11.0.8422.0", "kb", "3114479")
    );
    if (hotfix_check_office_product(product:"WordViewer", display_name:"Word Viewer", checks:word_vwr_checks, bulletin:bulletin))
      vuln = TRUE;
  }

  ######################################################################
  # Excel Viewer KB: 3114433
  ######################################################################
  vwr_checks = make_array(
    "12.0", make_array("version", "12.0.6739.5000", "kb", "3114433")
  );
  if (hotfix_check_office_product(product:"ExcelViewer", display_name:"Excel Viewer", checks:vwr_checks, bulletin:bulletin))
    vuln = TRUE;

  ######################################################################
  # Excel Compatibility pack  KB: 3114431
  ######################################################################
  compat_checks = make_array(
    "12.0", make_array("sp", 3, "version", "12.0.6739.5000", "kb", "3114431")
  );
  if (hotfix_check_office_product(product:"ExcelCnv", display_name:"Office Compatibility Pack SP3", checks:compat_checks, bulletin:bulletin))
    vuln = TRUE;

  ######################################################################
  # Word Compatibility pack   KB: 3114457
  ######################################################################
  installs = get_kb_list("SMB/Office/WordCnv/*/ProductPath");
  foreach install (keys(installs))
  {
    path = installs[install];
    path = ereg_replace(pattern:'^(.+)\\\\[^\\\\]+\\.exe$', replace:"\1\", string:path, icase:TRUE);
    if(hotfix_check_fversion(path:path, file:"wordcnv.dll",  version:"12.0.6740.5000", kb: "3114457", bulletin:bulletin, min_version:"12.0.0.0", product:"Microsoft Office Compatibility Pack") == HCF_OLDER)
      vuln = TRUE;
  }
}

perform_office_checks();
perform_office_product_checks();

if (vuln)
{
  set_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