Vulnerabilities > CVE-2015-2418 - Race Condition vulnerability in Microsoft Malicious Software Removal Tool

047910
CVSS 6.9 - MEDIUM
Attack vector
LOCAL
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
local
microsoft
CWE-362
nessus
NVD
Published: 2015-07-20
Updated: 2021-08-09

Summary

Race condition in Microsoft Malicious Software Removal Tool (MSRT) before 5.26 allows local users to gain privileges via a crafted DLL, aka "MSRT Race Condition Vulnerability."

Vulnerable Configurations

Part Description Count
Application
Microsoft
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leveraging Race Conditions
    This attack targets a race condition occurring when multiple processes access and manipulate the same resource concurrently and the outcome of the execution depends on the particular order in which the access takes place. The attacker can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance a race condition can occur while accessing a file, the attacker can trick the system by replacing the original file with his version and cause the system to read the malicious file.
  • Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
    This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. The typical example is the file access. The attacker can leverage a file access race condition by "running the race", meaning that he would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the attacker could do something such as replace the file and cause an escalation of privilege.

Nessus

NASL familyWindows
NASL idSMB_KB3074162.NASL
descriptionThe remote Windows host is affected by an elevation of privilege vulnerability due to the Malicious Software Removal Tool (MSRT) failing to properly handle a race condition involving DLL-planting. An authenticated attacker can exploit this vulnerability by placing a specially crafted DLL file in a local directory that is later run by MSRT, resulting in an elevation of privileges.
last seen2020-06-01
modified2020-06-02
plugin id84742
published2015-07-14
reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/84742
titleMS KB3074162: Vulnerability in Microsoft Malicious Software Removal Tool Could Allow Elevation of Privilege
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(84742);
  script_version("1.9");
  script_cvs_date("Date: 2019/11/22");

  script_cve_id("CVE-2015-2418");
  script_xref(name:"MSKB", value:"3074162");

  script_name(english:"MS KB3074162: Vulnerability in Microsoft Malicious Software Removal Tool Could Allow Elevation of Privilege");
  script_summary(english:"Checks the version of MSRT.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host has an antimalware application that is
affected by a privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote Windows host is affected by an elevation of privilege
vulnerability due to the Malicious Software Removal Tool (MSRT)
failing to properly handle a race condition involving DLL-planting.
An authenticated attacker can exploit this vulnerability by placing a
specially crafted DLL file in a local directory that is later run by
MSRT, resulting in an elevation of privileges.");
  script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityAdvisories/2015/3074162");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/2510781/microsoft-malware-protection-engine-deployment-information");
  script_set_attribute(attribute:"solution", value:
"Enable automatic updates to update the scan engine for the relevant
antimalware applications. Refer to KB2510781 for information on how to
verify MMPE (and the associated MSRT) has been updated.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-2418");

  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:"2015/07/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/07/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/07/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:malware_protection_engine");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("smb_mrt_installed.nasl");
  script_require_keys("SMB/MRT/Version");
  script_require_ports(139, 445);

  exit(0);
}

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

version = get_kb_item_or_exit('SMB/MRT/Version');
app = "Microsoft Malicious Software Removal Tool";

if (ver_compare(ver:version, fix:'5.26.0.0') == -1)
{
  port = get_kb_item("SMB/transport");
  if (isnull(port)) port = 445;

  if (report_verbosity > 0)
  {
    report =
      '\n  Product           : Microsoft Malicious Software Removal Tool' +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : 5.26\n';
    security_warning(port:port, extra:report);
  }
  else security_warning(port);
  exit(0);
}
else audit(AUDIT_INST_VER_NOT_VULN, app, version);

References