Security Updates for Microsoft Team Foundation Server and Azure DevOps Server (July 2020)

#
# (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(138472);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/11");

  script_cve_id("CVE-2020-1326");

  script_name(english:"Security Updates for Microsoft Team Foundation Server and Azure DevOps Server (July 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Team Foundation Server is affected by a cross-site scripting (XSS) vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Team Foundation Server or Azure DevOps Server is missing security updates. It is, therefore, affected by
a cross-site scripting (XSS) vulnerability due to not properly sanitizing user-provided input. An authenticated, remote
attacker can exploit this by sending a specially-crafted payload to the TFS or Azure DevOps server, which will get
executed in the context of the user every time a user visits the compromised page.");
  # https://devblogs.microsoft.com/devops/july-patches-for-azure-devops-server-and-team-foundation-server/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a7db314e");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following updates to address these issues:
  - Team Foundation Server 2018 Update 3.2 with patch 12
  - Azure DevOps Server 2019 Update 0.1 with patch 7
  - Azure DevOps Server 2019 Update 1.1 with patch 4

Please refer to the vendor guidance to determine the version and patch to apply.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/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:L/PR:L/UI:R/S:C/C:L/I:L/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-2020-1326");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/14");

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

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

  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("microsoft_team_foundation_server_installed.nasl", "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('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-07';

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();

port = kb_smb_transport();

installs = get_installs(app_name:'Microsoft Team Foundation Server', exit_if_not_found:TRUE);

foreach install (installs[1])
{
  vuln = FALSE;
  xss = FALSE;
  path = install['path'];
  update = install['Update'];
  release = install['Release'];

  spad_log(message: 'path: ' + path + '\n update: ' + update + '\n release: ' + release);
  # Those without update mappings
  if (empty_or_null(update) || !release)
    audit(AUDIT_HOST_NOT, 'affected');
  # 2018 Update 2 -> 2018 Update 3.2 (131)
  else if (release == '2018' && ver_compare(ver:update, fix:'3.2', minver:'2', strict:FALSE) <= 0 
    && !isnull(ver_compare(ver:update, fix:'3.2', minver:'2', strict:FALSE)))
  {
    path = hotfix_append_path(path:path, value:'Application Tier\\Web Services\\bin');
    if (hotfix_check_fversion(file:'Microsoft.TeamFoundation.WorkItemTracking.Web.dll',
                              version:'16.131.30229.4',
                              min_version:'16.131.0.0',
                              path:path,
                              product:'Microsoft Team Foundation Server 2018 Update 3.2') == HCF_OLDER)
    {
      xss = TRUE;
      vuln = TRUE;
      hotfix_add_report('Team Foundation Server 2018 prior to Update 3.2 patch 11 is vulnerable. Ensure\n' +
                        'the installation is updated to Update 3.2 patch 11', bulletin:bulletin);
     }
  }
  else if (release == '2019' && ver_compare(ver:update, fix:'0.1', minver:'0', strict:FALSE) <= 0)
  {
    path = hotfix_append_path(path:path, value:'Application Tier\\Web Services\\bin');
    if (hotfix_check_fversion(file:'Microsoft.TeamFoundation.WorkItemTracking.Server.DataServices.dll',
                              version:'17.143.30229.3',
                              min_version:'17.0.0.0',
                              path:path,
                              product:'Microsoft Azure DevOps Server 2019.0.1') == HCF_OLDER)
    {
      xss = TRUE;
      vuln = TRUE;
      hotfix_add_report('Azure DevOps Server 2019 prior to 2019.0.1 patch 7 is vulnerable. Ensure\n' +
                        'the installation is updated to 2019.0.1 patch 7.', bulletin:bulletin);
    }
  }
  else if (release == '2019' && ver_compare(ver:update, fix:'1.1', minver:'0', strict:FALSE) <= 0)
  {
    path = hotfix_append_path(path:path, value:'Application Tier\\Web Services\\bin');
    if (hotfix_check_fversion(file:'Microsoft.VisualStudio.Services.Feed.Server.dll',
                              version:'17.153.30229.2',
                              min_version:'17.0.0.0',
                              path:path,
                              product:'Microsoft Azure DevOps Server 2019.1.1') == HCF_OLDER)
    {
      xss = TRUE;
      vuln = TRUE;
      hotfix_add_report('Azure DevOps Server 2019 prior to 2019.1.1 patch 4 is vulnerable. Ensure\n' +
                        'the installation is updated to 2019.1.1 patch 4.', bulletin:bulletin);
    }
  }
}

if (vuln)
{
  if (xss) replace_kb_item(name:'www/'+port+'/XSS', value:TRUE);
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_note();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}