Vulnerabilities > CVE-2015-1715 - Permissions, Privileges, and Access Controls vulnerability in Microsoft Silverlight

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(83353);
  script_version("1.10");
  script_cvs_date("Date: 2018/07/14  1:59:36");

  script_cve_id(
    "CVE-2015-1670",
    "CVE-2015-1671",
    "CVE-2015-1715"
  );
  script_bugtraq_id(
    74485,
    74490,
    74503
  );
  script_xref(name:"MSFT", value:"MS15-049");
  script_xref(name:"MSFT", value:"MS15-044");
  script_xref(name:"MSKB", value:"3056819");

  script_name(english:"Microsoft Silverlight < 5.1.40416.00 Multiple Vulnerabilities (MS15-044 / MS15-049) (Mac OS X)");
  script_summary(english:"Checks the version of Microsoft Silverlight.");

  script_set_attribute(attribute:"synopsis", value:
"A multimedia application framework installed on the remote Mac OS X
host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Microsoft Silverlight installed on the remote host is
affected by multiple vulnerabilities :

  - An information disclosure vulnerability exists due to
    improper handling of OpenType fonts by the Windows
    DirectWrite library. A remote attacker can exploit this
    vulnerability by convincing a user to open a file or
    visit a website containing a specially crafted OpenType
    font, resulting in the disclosure of sensitive
    information. (MS15-044 / CVE-2015-1670)

  - A remote code execution vulnerability exists due to
    improper handling of TrueType font files by the Windows
    DirectWrite library. A remote attacker can exploit this
    vulnerability by convincing a user to open a specially
    crafted document or visit a website containing a
    specially crafted TrueType font file, resulting in
    execution of arbitrary code in the context of the
    current user. (MS15-044 / CVE-2015-1671)

  - A flaw exists in Microsoft Silverlight that allows a
    remote attacker, via a specially crafted Silverlight
    application, to execute arbitrary code with the same or
    higher level of permissions as the currently logged on
    user. (MS15-049 / CVE-2015-1715)");
  script_set_attribute(attribute:"see_also", value:"http://technet.microsoft.com/en-us/security/bulletin/ms15-049");
  script_set_attribute(attribute:"see_also", value:"http://technet.microsoft.com/en-us/security/bulletin/ms15-044");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Silverlight 5.");
  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:"2015/05/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/05/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/05/12");

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

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

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

  script_dependencies("macosx_silverlight_installed.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "MacOSX/Silverlight/Installed");

  exit(0);
}

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

kb_base = "MacOSX/Silverlight";
get_kb_item_or_exit(kb_base+"/Installed");
path = get_kb_item_or_exit(kb_base+"/Path", exit_code:1);
version = get_kb_item_or_exit(kb_base+"/Version", exit_code:1);


bulletin = "MS15-049";
kb = "3056819";

fixed_version = "5.1.40416.00";
if (version =~ "^5\." && ver_compare(ver:version, fix:fixed_version, strict:FALSE) < 0)
{
  if (defined_func("report_xml_tag")) report_xml_tag(tag:bulletin, value:kb);

  if (report_verbosity > 0)
  {
    report =
      '\n  Path              : ' + path +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' +fixed_version +
      '\n';
    security_hole(port:0, extra:report);
  }
  else security_hole(0);
  exit(0);
}
else exit(0, "The Microsoft Silverlight "+version+" install is not reported to be affected.");

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(83354);
  script_version("1.9");
  script_cvs_date("Date: 2018/11/15 20:50:31");

  script_cve_id("CVE-2015-1715");
  script_bugtraq_id(74503);
  script_xref(name:"MSFT", value:"MS15-049");
  script_xref(name:"MSKB", value:"3056819");

  script_name(english:"MS15-049: Vulnerability in Silverlight Could Allow Elevation of Privilege (3058985)");
  script_summary(english:"Checks the version of Microsoft Silverlight.exe.");

  script_set_attribute(attribute:"synopsis", value:
"A multimedia application framework installed on the remote Windows
host is affected by a privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Microsoft Silverlight installed on the remote host is
affected by a privilege escalation vulnerability. A remote attacker
can exploit this flaw, via a specially crafted Silverlight
application, to execute arbitrary code with the same or higher level
of permissions as the currently logged on user.");
  script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2015/ms15-049");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Silverlight 5.");
  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:U/RL:OF/RC:C");
  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:"2015/05/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/05/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/05/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:silverlight");
  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("smb_hotfixes.nasl", "silverlight_detect.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_hotfixes_fcheck.inc");
include("smb_hotfixes.inc");
include("smb_func.inc");
include("misc_func.inc");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = 'MS15-049';
kb = "3056819";

kbs = make_list(kb);
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");

# Silverlight 5.x
ver = get_kb_item("SMB/Silverlight/Version");
if (isnull(ver)) audit(AUDIT_NOT_INST, "Silverlight");
if (ver !~ "^5\.") audit(AUDIT_NOT_INST, "Silverlight 5");

fix = "5.1.40416.00";
if (ver_compare(ver:ver, fix:fix) == -1)
{
  path = get_kb_item("SMB/Silverlight/Path");
  if (isnull(path)) path = 'n/a';

  report +=
    '\n  Path              : ' + path +
    '\n  Installed version : ' + ver +
    '\n  Fixed version     : ' + fix +
    '\n';
  hotfix_add_report(report, bulletin:bulletin, kb:kb);

  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');
}