Vulnerabilities > CVE-2016-0149 - Information Exposure vulnerability in Microsoft .Net Framework

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: 2016-05-11
Updated: 2018-10-12

Summary

Microsoft .NET Framework 2.0 SP2, 3.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6, and 4.6.1 allows man-in-the-middle attackers to obtain sensitive cleartext information via vectors involving injection of cleartext data into the client-server data stream, aka "TLS/SSL Information Disclosure Vulnerability."

Vulnerable Configurations

Part Description Count
Application
Microsoft
7

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.

Msbulletin

bulletin_idMS16-065
bulletin_url
date2016-05-10T00:00:00
impactInformation Disclosure
knowledgebase_id3156757
knowledgebase_url
severityImportant
titleSecurity Update for .NET Framework

Nessus

NASL familyWindows : Microsoft Bulletins
NASL idSMB_NT_MS16-065.NASL
descriptionThe remote Windows host is missing a security update. It is, therefore, affected by an information disclosure vulnerability in the .NET Framework encryption component. A man-in-the-middle attacker can exploit this vulnerability by injecting unencrypted data into the secure channel between a targeted client and a legitimate server, allowing the attacker to decrypt encrypted SSL/TLS traffic.
last seen2020-05-16
modified2016-05-10
plugin id91014
published2016-05-10
reporterThis script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/91014
titleMS16-065: Security Update for .NET Framework (3156757)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(91014);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/15");

  script_cve_id("CVE-2016-0149");
  script_bugtraq_id(90026);
  script_xref(name:"MSFT", value:"MS16-065");
  script_xref(name:"MSKB", value:"3142023");
  script_xref(name:"MSKB", value:"3142024");
  script_xref(name:"MSKB", value:"3142025");
  script_xref(name:"MSKB", value:"3142026");
  script_xref(name:"MSKB", value:"3142030");
  script_xref(name:"MSKB", value:"3142032");
  script_xref(name:"MSKB", value:"3142033");
  script_xref(name:"MSKB", value:"3142035");
  script_xref(name:"MSKB", value:"3142036");
  script_xref(name:"MSKB", value:"3142037");
  script_xref(name:"MSKB", value:"3156387");
  script_xref(name:"MSKB", value:"3156421");
  script_xref(name:"IAVB", value:"2016-B-0087-S");

  script_name(english:"MS16-065: Security Update for .NET Framework (3156757)");
  script_summary(english:"Checks the file versions.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by an information disclosure
vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote Windows host is missing a security update. It is,
therefore, affected by an information disclosure vulnerability in the
.NET Framework encryption component. A man-in-the-middle attacker can
exploit this vulnerability by injecting unencrypted data into the
secure channel between a targeted client and a legitimate server,
allowing the attacker to decrypt encrypted SSL/TLS traffic.");
  # https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2016/ms16-065
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6fda3559");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Microsoft .NET Framework
2.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6, and 4.6.1.");
  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:H/PR:N/UI:N/S:U/C:H/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-2016-0149");

  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:"2016/05/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:.net_framework");
  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) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl", "microsoft_net_framework_installed.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");

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

global_var bulletin, vuln, arch;

arch = get_kb_item_or_exit('SMB/ARCH');
vuln = 0;
bulletin = 'MS16-065';

kbs = make_list(
  "3142023",
  "3142024",
  "3142025",
  "3142026",
  "3142030",
  "3142032",
  "3142033",
  "3142035",
  "3142036",
  "3142037",
  "3156387",
  "3156421"
);


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");
winver = get_kb_item_or_exit('SMB/WindowsVersion', exit_code:1);
if (hotfix_check_sp_range(vista:'2', win7:'1', win8:'0', win81:'0', win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN);

productname = get_kb_item_or_exit("SMB/ProductName", exit_code:1);
if ("Windows 8" >< productname && "Windows 8.1" >!< productname) audit(AUDIT_OS_SP_NOT_VULN);

share = hotfix_get_systemdrive(exit_on_fail:TRUE, as_share:TRUE);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);

# dotnet checks
function perform_dotnet_checks()
{
  local_var dotnet_452_installed, dotnet_46_installed, dotnet_461_installed, dotnet_35_installed;
  local_var ver, missing, count, installs, install;

  # Determine if .NET 4.5.2 or 4.6 is installed
  dotnet_452_installed = FALSE;
  dotnet_46_installed  = FALSE;
  dotnet_461_installed = FALSE;
  dotnet_35_installed  = FALSE;

  # Make sure to add dependency for microsoft_net_framework_installed.nasl
  count = get_install_count(app_name:'Microsoft .NET Framework');
  if (count > 0)
  {
    installs = get_installs(app_name:'Microsoft .NET Framework');
    foreach install(installs[1])
    {
      ver = install["version"];
      if (ver == "4.6.1") dotnet_461_installed = TRUE;
      if (ver == "4.6") dotnet_46_installed = TRUE;
      if (ver == "4.5.2") dotnet_452_installed = TRUE;
      if (ver == "3.5") dotnet_35_installed = TRUE;
    }
  }

  ########## KB3142023 #############
  # .NET Framework 2.0 SP2         #
  # Windows Vista SP2              #
  # Windows Server 2008 SP2        #
  ##################################
  missing = 0;
  missing += hotfix_is_vulnerable(os:"6.0", sp:2, file:"system.dll", version:"2.0.50727.4264", min_version:"2.0.50727.0",    dir:"\Microsoft.NET\Framework\v2.0.50727");
  missing += hotfix_is_vulnerable(os:"6.0", sp:2, file:"system.dll", version:"2.0.50727.8686", min_version:"2.0.50727.6500", dir:"\Microsoft.NET\Framework\v2.0.50727");

  if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142023");
  vuln += missing;

  if (dotnet_35_installed)
  {
    ########### KB3142024 #############
    # .NET Framework 3.5.1            #
    # Windows 7 SP1                   #
    # Windows Server 2008 R2 SP1      #
    ###################################
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.1", sp:1, file:"system.dll", version:"2.0.50727.8686", min_version:"2.0.50727.0", dir:"\Microsoft.NET\Framework\v2.0.50727");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142024");
    vuln += missing;

    ########### KB3142026 ###########
    # .NET Framework 3.5            #
    # Windows 8.1                   #
    # Windows Server 2012 R2        #
    #################################
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.3", sp:0, file:"system.dll", version:"2.0.50727.8686", min_version:"2.0.50727.0", dir:"\Microsoft.NET\Framework\v2.0.50727");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142026");
    vuln += missing;

    ########### KB3142025 ###########
    # .NET Framework 3.5            #
    # Windows Server 2012           #
    #################################
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.2", sp:0, file:"system.dll", version:"2.0.50727.8686", min_version:"2.0.50727.0", dir:"\Microsoft.NET\Framework\v2.0.50727");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142025");
    vuln += missing;
  }

  ############ KB3142030 ############
  # .NET Framework 4.5.2            #
  # Windows 8.1                     #
  # Windows Server 2012 R2          #
  ###################################
  if (dotnet_452_installed)
  {
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.3", sp:0, file:"system.dll", version:"4.0.30319.36350", min_version:"4.0.30319.34000", dir:"\Microsoft.NET\Framework\v4.0.30319");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142030");
    vuln += missing;
  }

  ########### KB3142032 ###########
  # .NET Framework 4.5.2          #
  # Windows Server 2012           #
  #################################
  if (dotnet_452_installed)
  {
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.2", sp:0, file:"system.dll", version:"4.0.30319.36350", min_version:"4.0.30319.34000", dir:"\Microsoft.NET\Framework\v4.0.30319");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142032");
    vuln += missing;
  }


  ########## KB3142033 #############
  # .NET Framework 4.5.2           #
  # Windows Vista SP2              #
  # Windows Server 2008 SP2        #
  # Windows 7 SP1                  #
  # Windows Server 2008 R2 SP1     #
  ##################################
  if (dotnet_452_installed)
  {
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.0", sp:2, file:"system.dll", version:"4.0.30319.34294", min_version:"4.0.30319.34000",     dir:"\Microsoft.NET\Framework\v4.0.30319");
    missing += hotfix_is_vulnerable(os:"6.0", sp:2, file:"system.dll", version:"4.0.30319.36351", min_version:"4.0.30319.35000", dir:"\Microsoft.NET\Framework\v4.0.30319");
    missing += hotfix_is_vulnerable(os:"6.1", sp:1, file:"system.dll", version:"4.0.30319.34294", min_version:"4.0.30319.34000",     dir:"\Microsoft.NET\Framework\v4.0.30319");
    missing += hotfix_is_vulnerable(os:"6.1", sp:1, file:"system.dll", version:"4.0.30319.36351", min_version:"4.0.30319.35000", dir:"\Microsoft.NET\Framework\v4.0.30319");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142033");
    vuln += missing;
  }

  ########### KB3142035 ###########
  # .NET Framework 4.6 / 4.6.1    #
  # Windows Server 2012           #
  #################################
  if (dotnet_46_installed || dotnet_461_installed)
  {
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.2", sp:0, file:"system.dll", version:"4.6.1075.0", min_version:"4.6.0.0", dir:"\Microsoft.NET\Framework\v4.0.30319");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142035");
    vuln += missing;
  }

  ############ KB3142036 ############
  # .NET Framework 4.6 / 4.6.1      #
  # Windows 8.1                     #
  # Windows Server 2012 R2          #
  ###################################
  if (dotnet_46_installed || dotnet_461_installed)
  {
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.3", sp:0, file:"system.dll", version:"4.6.1075.0", min_version:"4.6.0.0", dir:"\Microsoft.NET\Framework\v4.0.30319");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142036");
    vuln += missing;
  }

  ########## KB3142037 #############
  # .NET Framework 4.6             #
  # Windows Vista SP2              #
  # Windows Server 2008 SP2        #
  # Windows 7 SP1                  #
  #  Windows Server 2008 R2 SP1    #
  ##################################
  if (dotnet_46_installed || dotnet_461_installed)
  {
    missing = 0;
    missing += hotfix_is_vulnerable(os:"6.0", sp:2, file:"system.dll", version:"4.6.1075.0", min_version:"4.6.0.0", dir:"\Microsoft.NET\Framework\v4.0.30319");
    missing += hotfix_is_vulnerable(os:"6.1", sp:1, file:"system.dll", version:"4.6.1075.0", min_version:"4.6.0.0", dir:"\Microsoft.NET\Framework\v4.0.30319");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3142037");
    vuln += missing;
  }

  ############# KB3156387 #############
  #  .NET Framework                   #
  #  Windows 10                       #
  #####################################
  if (dotnet_35_installed)
  {
    #  3.5 is optional addon in 10
    missing = 0;
    missing += hotfix_is_vulnerable(os:"10", sp:0, file:"system.dll", version:"2.0.50727.8686", min_version:"2.0.50727.6500", dir:"\Microsoft.NET\Framework\v2.0.50727");

    if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3156387");
    vuln += missing;
  }
  missing = 0;
  missing += hotfix_is_vulnerable(os:"10", sp:0, file:"system.dll", version:"4.6.1075.0", min_version:"4.6.0.0", dir:"\Microsoft.NET\Framework\v4.0.30319");

  if (missing > 0) hotfix_add_report(bulletin:bulletin, kb:"3156387");
  vuln += missing;
}

perform_dotnet_checks();

if(vuln)
{
  set_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');
}

References