Xerox WorkCentre Unspecified Remote Protocol Authorization Bypass (XRX13-008)

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

include("compat.inc");

if (description)
{
  script_id(70659);
  script_version("1.6");
  script_cvs_date("Date: 2019/01/02 16:37:55");

  script_bugtraq_id(63270);

  script_name(english:"Xerox WorkCentre Unspecified Remote Protocol Authorization Bypass (XRX13-008)");
  script_summary(english:"Checks system software version of Xerox WorkCentre devices");

  script_set_attribute(attribute:"synopsis",
    value:
"The remote multi-function device is affected by an authorization bypass
vulnerability."
  );
  script_set_attribute(
    attribute:"description",
    value:
"According to its model number and software version, the remote host is
a Xerox WorkCentre device that is affected by an unspecified, remote
protocol authorization bypass vulnerability."
  );
  # https://www.xerox.com/download/security/security-bulletin/148ae-4e940cfff7450/cert_XRX13-008_v1.0.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b0b8eade");
  script_set_attribute(
    attribute:"solution",
    value:
"Apply the appropriate cumulative update as described in the Xerox
security bulletin in the referenced URL."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:"2013/10/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/10/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/10/28");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:xerox:workcentre");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("xerox_workcentre_detect.nasl");
  script_require_keys("www/xerox_workcentre", "www/xerox_workcentre/model", "www/xerox_workcentre/ssw");

  exit(0);
}

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

# Get model and system software version
model = get_kb_item_or_exit("www/xerox_workcentre/model");
ssw_version = get_kb_item_or_exit("www/xerox_workcentre/ssw");

ssw = split(ssw_version, sep:".", keep:FALSE);

# Store version as a string with preceding 0's.
# ie: 071.030.100.06400
ssw_str = ssw;

# Store version as an integer without preceding 0's
# ie: 71.30.100.6400
for (i=0; i<max_index(ssw); i++)
   ssw[i] = int(ssw[i]);

# Variables
fix = NULL;
not_affected = FALSE;
patched = FALSE;

# WorkCentre 6400
# SSW Versions < 061.070.100.24201 are affected
if (model =~ "^6400")
{
  patch_ver = "061.070.100.24201";

  if (
    (ssw_str[0] =~ "^0" && ssw[0] < 61) ||
    (ssw_str[0] == '061' && (ssw_str[1] =~ "^0" && ssw[1] < 70)) ||
    (ssw_str[0] == '061' && ssw_str[1] == '070' && ssw[2] < 100) ||
    (ssw_str[0] == '061' && ssw_str[1] == '070' && ssw_str[2] == '100' && ssw[3] < 24201)
  )
  {
    fix = patch_ver;
  }

  else if (ssw_version == patch_ver)
  {
    patched = TRUE;
    patch = patch_ver;
  }
  else
  {
    not_affected = TRUE;
  }
}

# WorkCentre 7525/7530/7535/7545/7556
# SSW Versions < 061.121.222.06508 are affected
if (model =~ "^7525" || model =~ "^753[05]" || model =~ "^7545" || model =~ "^7556")
{
  patch_ver = "061.121.222.06508";

  if (
    (ssw_str[0] =~ "^0" && ssw[0] < 61) ||
    (ssw_str[0] == '061' && ssw[1] < 121) ||
    (ssw_str[0] == '061' && ssw_str[1] == '121' && ssw[2] < 222) ||
    (ssw_str[0] == '061' && ssw_str[1] == '121' && ssw_str[2] == '222' && ssw_str[3] =~ "^0" && ssw[3] < 6508)
  )
  {
    fix = patch_ver;
  }
  else if (ssw_version == patch_ver)
  {
    patched = TRUE;
    patch = patch_ver;
  }
  else
  {
    not_affected = TRUE;
  }
}

# WorkCentre 7755/7765/7775
# SSW Versions < 061.090.223.21400 are affected
if (model =~ "^77[567]5")
{
  patch_ver = "061.090.223.21400";

  if (
    (ssw_str[0] =~ "^0" && ssw[0] < 61) ||
    (ssw_str[0] == '061' && (ssw_str[1] =~ "^0" && ssw[1] < 90)) ||
    (ssw_str[0] == '061' && ssw_str[1] == '090' && ssw[2] < 223) ||
    (ssw_str[0] == '061' && ssw_str[1] == '090' && ssw_str[2] == '223' &&
    ssw[3] < 21400)
  )
  {
    fix = patch_ver;
  }
  else if (ssw_version == patch_ver)
  {
    patched = TRUE;
    patch = patch_ver;
  }
  else
  {
    not_affected = TRUE;
  }
}

if (patched) audit(AUDIT_PATCH_INSTALLED, "System SW Version " + patch + " for Xerox WorkCentre " + model);

if (not_affected) audit(AUDIT_INST_VER_NOT_VULN, "Xerox WorkCentre "+model +" System SW", ssw_version);

if (!isnull(fix))
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Model                             : Xerox WorkCentre ' + model +
      '\n  Installed System Software version : ' + ssw_version +
      '\n  Fixed System Software version     : ' + fix + '\n';
    security_hole(port:0, extra:report);
  }
  else security_hole(0);
}
else audit(AUDIT_HOST_NOT, "an affected Xerox WorkCentre model");