BlackBerry Enterprise Server / Attachment Service PDF Distiller Unspecified Vulnerabilities (KB19860)

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

include("compat.inc");

if (description)
{
  script_id(43007);
  script_version("1.14");
  script_cvs_date("Date: 2018/11/15 20:50:26");

  script_cve_id("CVE-2009-4778");
  script_bugtraq_id(37167);
  script_xref(name:"Secunia", value:"37562");

  script_name(english:"BlackBerry Enterprise Server / Attachment Service PDF Distiller Unspecified Vulnerabilities (KB19860)");
  script_summary(english:"Checks version and looks for workaround");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host has an application that is affected by
unspecified vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of BlackBerry Enterprise Server on the remote host
reportedly contains several unspecified vulnerabilities in the PDF
distiller component of the BlackBerry Attachment Service. By sending a
specially crafted PDF file and having it opened on a Blackberry
smartphone, an attacker may be able to execute arbitrary code on the
system that runs the BlackBerry Attachment Service.");
  script_set_attribute(attribute:"see_also", value:"https://salesforce.services.blackberry.com/kbredirect/viewContent.do?externalID=KB19860");
  script_set_attribute(attribute:"solution", value:"Apply the vendor-supplied patches.");
  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:"2009/12/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2009/12/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/12/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:rim:blackberry_enterprise_server");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2009-2018 Tenable Network Security, Inc.");

  script_dependencies("blackberry_es_installed.nasl", "smb_hotfixes.nasl");
  script_require_keys("BlackBerry_ES/Product", "BlackBerry_ES/Path", "BlackBerry_ES/Version", "BlackBerry_ES/AttachmentServer", "SMB/Registry/Enumerated");
  script_require_ports(139, 445);

  exit(0);
}

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

prod = get_kb_item_or_exit("BlackBerry_ES/Product");
version = get_kb_item_or_exit("BlackBerry_ES/Version");
path = get_kb_item_or_exit("BlackBerry_ES/Path");
if (isnull(get_kb_item("BlackBerry_ES/AttachmentServer"))) exit(0, "The host is not affected because BlackBerry Attachment Server isn't installed.");

#Exit unless it looks like a vulnerable version
if (("Enterprise Server" >< prod && !ereg(pattern:"4\.1\.[3-7]|5\.0", string:version)) ||
     ("Professional Software" >< prod && (version =~ " 4\.1\.4"))
   ) exit(1, "Did not detect an affected version.");

BES4    = 0;
BES4Pro = 0;
BES5    = 0;

if      ("Enterprise Server" >< prod && version =~ "4\.1") BES4 = 1;
else if ("Enterprise Server" >< prod && version =~ "5\.0") BES5 = 1;
else if ("Professional Server" >< prod && version =~ "4\.1") BES4Pro = 1;

if (!get_kb_item("SMB/Registry/Enumerated")) exit(1, "The 'SMB/Registry/Enumerated' KB item is missing.");

#Connect to the appropriate share.
port    = kb_smb_transport();
login   = kb_smb_login();
pass    = kb_smb_password();
domain  = kb_smb_domain();

if(! smb_session_init()) audit(AUDIT_FN_FAIL, 'smb_session_init');
rc = NetUseAdd(login:login, password:pass, domain:domain, share:"IPC$");
if (rc != 1) {
  NetUseDel();
  exit(1, "Could not connect to IPC$ share.");
}

#Connect to remote registry
hklm = RegConnectRegistry(hkey:HKEY_LOCAL_MACHINE);
if (isnull(hklm))
{
  NetUseDel();
  exit(1, "Could not connect to the remote registry.");
}

#Determine whether the workaround has been implemented.
info = "";

if (report_paranoia > 1)
{
  info = 'Note, though that Nessus did not check whether the workaround has \n'+
  'been implemented because of the Report Paranoia setting in effect\n'+
  'when this scan was run.';
}
else
{
  if (BES4)
  {
    key = "SOFTWARE\Research In Motion\BBAttachServer\BBAttachBESEXtension";
    key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
    if (!isnull(key_h))
    {
      item = RegQueryValue(handle:key_h, item:"BBAttachFormatList");
      if (!isnull(item))
      {
        formats = item[1];
        if ("|pdf|" >< formats) info += "  - The format extensions field includes 'pdf'." + '\n';
      }
      RegCloseKey(handle:key_h);
    }
  }

  key = "SOFTWARE\Research In Motion\BBAttachEngine\Distillers\LoadPDFDistiller";
  key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
  if (!isnull(key_h))
  {
    item = RegQueryValue(handle:key_h, item:"Enabled");
    if (!isnull(item))
    {
      enabled = item[1];
      if (enabled) info += '  - The PDF distiller is enabled.\n';
    }
    RegCloseKey(handle:key_h);
  }

  if (info)
  {
    if (BES4 || max_index(split(info)) > 1)
    {
      info =
        "Nessus has determined that the workaround described in the" + '\n' +
        "vendor's advisory has not been implemented because :" + '\n' +
        '\n' +
        info;
    }
    else
    {
      info =
        "Nessus has determined that the workaround described in the" + '\n' +
        "vendor's advisory has only been partially implemented" + '\n' +
        "because :" + '\n' +
        '\n' +
        info;
    }
  }
}
RegCloseKey(handle:hklm);
if (!info)
{
  NetUseDel();
  exit(1, "Could not detect whether the workaround has been implemented.");
}

#Check if the patch for BlackBerry ES was applied.
vuln = FALSE;
if (!isnull(path))
{
  share = ereg_replace(pattern:"^([A-Za-z]):.*", replace:"\1$", string:path);
  path2 = ereg_replace(pattern:"^[A-Za-z]:(.*)", replace:"\1\", string:path);
  NetUseDel(close:FALSE);

  rc = NetUseAdd(login:login, password:pass, domain:domain, share:share);
  if (rc == 1)
  {
    dlls = make_list(
      "AttachServer\BBDecorator\BBRenderingDecorator.dll",
      "AttachServer\BBDecorator\BBXRenderingDecorator.dll",
      "AttachServer\BBDistiller\BBDM_PDF.dll"
    );

    dll_probs = "";
    foreach dll (dlls)
    {
      fh = CreateFile(
        file:path2+dll,
        desired_access:GENERIC_READ,
        file_attributes:FILE_ATTRIBUTE_NORMAL,
        share_mode:FILE_SHARE_READ,
        create_disposition:OPEN_EXISTING
      );
      if (!isnull(fh))
      {
        ver = GetFileVersion(handle:fh);
        if (ver)
        {
          if (( BES4 &&
              (ver[0]==4 && ver[1]==1 &&
                (
                  (ver[2] < 4) ||
                  (ver[2]==4 && ver[3] < 24) ||
                  (ver[2]==5) ||
                  (ver[2]==6 && ver[3] < 18) ||
                  (ver[2]==7 && ver[3] < 7)
                )
              )) ||
              ( BES5 &&
              (ver[0]==5 && ver[1]==0 &&
                (
                  (ver[2]==0 && ver[3] < 56) ||
                  (ver[2]==1 && ver[3] < 33)
                )
              )) ||
              ( BESPro && ((ver[0] < 4) ||
                          (ver[0]==4 && ver[1] < 1) ||
                          (ver[0]==4 && ver[1]==1 && ver[2] < 4) ||
                          (ver[0]==4 && ver[1]==1 && ver[2]==4 && ver[3] < 24)))
            )
          {
            file_version = ver[0] + "." + ver[1] + "." + ver[2] + "." + ver[3];
            dll_probs += '  - ' + dll + ' (version ' + file_version + ')\n';
            vuln = TRUE;
          }
        }
        else dll_probs += '  - ' + dll + ' (unknown version)\n';

        CloseFile(handle:fh);
      }
      else dll_probs += '  - ' + dll + ' (unable to open file)\n';
    }

    # There's no vulnerability if we could determine the DLLs have been patched.
    if (!dll_probs) info = "";
    # Otherwise if there's at least one patched file...
    else if (max_index(split(dll_probs)) < max_index(keys(dlls)))
    {
      if (max_index(split(dll_probs)) > 1) s = "s are";
      else s = " is";

      if (vuln)
      {
        info = info +
          '\n' +
          'In addition, it appears that the patch has not been\n' +
          'installed completely as the following file' + s + ' still\n' +
          'vulnerable :\n' +
          '\n' +
          dll_probs;
      }
      else exit(1, "There was an issue accessing at least one of the affected DLLs.");
    }
  }
}
NetUseDel();

#Report if an issue was found.
if (info)
{
  if (report_verbosity > 0)
  {
    report = '\n' +
      '  Product  : ' + prod + '\n' +
      '  Version  : ' + version + '\n' +
      '  Comments : ' + str_replace(find:'\n', replace:'\n              ', string:info);
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
}
else exit(0, "The installed " + prod + " version " + version + " is not affected.");