Vulnerabilities > CVE-2020-0884 - Cleartext Transmission of Sensitive Information vulnerability in Microsoft Visual Studio 2017 and Visual Studio 2019

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-319
nessus

Summary

A spoofing vulnerability exists in Microsoft Visual Studio as it includes a reply URL that is not secured by SSL, aka 'Microsoft Visual Studio Spoofing Vulnerability'.

Vulnerable Configurations

Part Description Count
Application
Microsoft
75

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Session Sidejacking
    Session sidejacking takes advantage of an unencrypted communication channel between a victim and target system. The attacker sniffs traffic on a network looking for session tokens in unencrypted traffic. Once a session token is captured, the attacker performs malicious actions by using the stolen token with the targeted application to impersonate the victim. This attack is a specific method of session hijacking, which is exploiting a valid session token to gain unauthorized access to a target system or information. Other methods to perform a session hijacking are session fixation, cross-site scripting, or compromising a user or server machine and stealing the session token.
  • 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.
  • Harvesting Usernames or UserIDs via Application API Event Monitoring
    An attacker hosts an event within an application framework and then monitors the data exchanged during the course of the event for the purpose of harvesting any important data leaked during the transactions. One example could be harvesting lists of usernames or userIDs for the purpose of sending spam messages to those users. One example of this type of attack involves the attacker creating an event within the sub-application. Assume the attacker hosts a "virtual sale" of rare items. As other users enter the event, the attacker records via MITM proxy the user_ids and usernames of everyone who attends. The attacker would then be able to spam those users within the application using an automated script.
  • Signature Spoofing by Mixing Signed and Unsigned Content
    An attacker exploits the underlying complexity of a data structure that allows for both signed and unsigned content, to cause unsigned data to be processed as though it were signed data.
  • Passively Sniff and Capture Application Code Bound for Authorized Client
    Attackers can capture application code bound for the client and can use it, as-is or through reverse-engineering, to glean sensitive information or exploit the trust relationship between the client and server. Such code may belong to a dynamic update to the client, a patch being applied to a client component or any such interaction where the client is authorized to communicate with the server.

Nessus

NASL familyWindows : Microsoft Bulletins
NASL idSMB_NT_MS20_MAR_VISUAL_STUDIO.NASL
descriptionThe Microsoft Visual Studio Products are missing security updates. It is, therefore, affected by multiple vulnerabilities : - A spoofing vulnerability exists in Microsoft Visual Studio as it includes a reply URL that is not secured by SSL. An attacker who successfully exploited this vulnerability could compromise the access tokens, exposing security and privacy risks. (CVE-2020-0884) - An elevation of privilege vulnerability exists when the Diagnostics Hub Standard Collector or the Visual Studio Standard Collector allows file creation in arbitrary locations. (CVE-2020-0810) - An elevation of privilege vulnerability exists when the Diagnostics Hub Standard Collector Service improperly handles file operations. An attacker who successfully exploited this vulnerability could gain elevated privileges. An attacker with unprivileged access to a vulnerable system could exploit this vulnerability. The security update addresses the vulnerability by ensuring the Diagnostics Hub Standard Collector Service properly handles file operations. (CVE-2020-0793) - A denial of service vulnerability exists when the Visual Studio Extension Installer Service improperly handles hard links. An attacker who successfully exploited the vulnerability could cause a target system to stop responding. (CVE-2020-0789)
last seen2020-04-18
modified2020-03-10
plugin id134381
published2020-03-10
reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/134381
titleSecurity Updates for Microsoft Visual Studio Products (March 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(134381);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/17");

  script_cve_id(
    "CVE-2020-0789",
    "CVE-2020-0793",
    "CVE-2020-0810",
    "CVE-2020-0884"
  );
  script_xref(name:"MSKB", value:"4538032");
  script_xref(name:"MSFT", value:"MS20-4538032");

  script_name(english:"Security Updates for Microsoft Visual Studio Products (March 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Visual Studio Products are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Visual Studio Products are missing security
updates. It is, therefore, affected by multiple
vulnerabilities :

  - A spoofing vulnerability exists in Microsoft Visual
    Studio as it includes a reply URL that is not secured by
    SSL. An attacker who successfully exploited this
    vulnerability could compromise the access tokens,
    exposing security and privacy risks.  (CVE-2020-0884)

  - An elevation of privilege vulnerability exists when the
    Diagnostics Hub Standard Collector or the Visual Studio
    Standard Collector allows file creation in arbitrary
    locations.  (CVE-2020-0810)

  - An elevation of privilege vulnerability exists when the
    Diagnostics Hub Standard Collector Service improperly
    handles file operations. An attacker who successfully
    exploited this vulnerability could gain elevated
    privileges. An attacker with unprivileged access to a
    vulnerable system could exploit this vulnerability. The
    security update addresses the vulnerability by ensuring
    the Diagnostics Hub Standard Collector Service properly
    handles file operations. (CVE-2020-0793)

  - A denial of service vulnerability exists when the Visual
    Studio Extension Installer Service improperly handles
    hard links. An attacker who successfully exploited the
    vulnerability could cause a target system to stop
    responding.  (CVE-2020-0789)");
  # https://support.microsoft.com/en-us/help/4538032/march-10-2020-security-update-for-microsoft-visual-studio-2015
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?627290b1");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:
  - KB4538032
  - Update 15.9.21 for Visual Studio 2017
  - Update 16.0.12 for Visual Studio 2019
  - Update 16.4.6 for Visual Studio 2019");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/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:L/UI:N/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-2020-0793");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:visual_studio");
  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("ms_bulletin_checks_possible.nasl", "microsoft_visual_studio_installed.nbin");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible", "installed_sw/Microsoft Visual Studio");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

include('audit.inc');
include('misc_func.inc');
include('install_func.inc');
include('global_settings.inc');
include('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');

get_kb_item_or_exit('installed_sw/Microsoft Visual Studio');

port = kb_smb_transport();
appname = 'Microsoft Visual Studio';

installs = get_installs(app_name:appname, exit_if_not_found:TRUE);

report = '';

foreach install (installs[1])
{
  version = install['version'];
  path = install['path'];
  prod = install['Product'];

  fix = '';

  # VS 2015 Up3
  if (version =~ '^14\\.0\\.')
  {
    patch_installed = false;
    foreach name (get_kb_list('SMB/Registry/HKLM/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/*/DisplayName'))
      if ('4538032' >< name)
        patch_installed = true;

    if (!patch_installed)
      report +=
        '\nNote: The fix for this issue is available in the following update:\n' +
        '\n  - KB4538032 : Security update for Microsoft Visual Studio 2015 Update 3: March 10, 2020\n' +
        '\n';
  }
  # VS 2017 (15.9)
  else if (prod == '2017' && version =~ '^15\\.[1-9]\\.')
  {
    fix = '15.9.28307.1064';

    if (ver_compare(ver: version, fix: fix, strict:FALSE) < 0)
    {
      report +=
        '\n  Path              : ' + path +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix +
        '\n';
    }
  }
  # VS 2019 Version 16.0
  else if (prod == '2019' && version =~ '^16\\.0\\.')
  {
    fix = '16.0.28803.697';
    if (ver_compare(ver: version, fix: fix, strict:FALSE) < 0)
    {
      report +=
        '\n  Path              : ' + path +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix +
        '\n';
    }
  }
  # VS 2019 Version 16.4
  else if (prod == '2019' && version =~ '^16\\.4\\.')
  {
    fix = '16.4.29905.134';
    if (ver_compare(ver: version, fix: fix, strict:FALSE) < 0)
    {
      report +=
        '\n  Path              : ' + path +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix +
        '\n';
    }
  }
}

if (empty(report))
  audit(AUDIT_INST_VER_NOT_VULN, appname);

security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);