Vulnerabilities > CVE-2018-6250 - NULL Pointer Dereference vulnerability in Nvidia GPU Driver

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

include("compat.inc");

if (description)
{
  script_id(111107);
  script_version("1.4");
  script_cvs_date("Date: 2019/11/04");

  script_cve_id(
    "CVE-2018-6247",
    "CVE-2018-6248",
    "CVE-2018-6249",
    "CVE-2018-6250",
    "CVE-2018-6251",
    "CVE-2018-6252",
    "CVE-2018-6253"
  );

  script_name(english:"NVIDIA Linux GPU Display Driver Multiple Vulnerabilities");
  script_summary(english:"Checks the driver version.");

  script_set_attribute(attribute:"synopsis", value:
"A display driver installed on the remote Windows host is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The NVIDIA GPU display driver software on the remote host is missing
a security update. It is, therefore, affected by multiple
vulnerabilities.");
  script_set_attribute(attribute:"see_also", value:"https://nvidia.custhelp.com/app/answers/detail/a_id/4649");
  script_set_attribute(attribute:"solution", value:
"Upgrade the NVIDIA graphics driver in accordance with the
vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-6251");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/07/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:nvidia:gpu_driver");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("wmi_enum_display_drivers.nbin");
  script_require_keys("WMI/DisplayDrivers/NVIDIA", "Settings/ParanoidReport");

  exit(0);
}

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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

kb_base = 'WMI/DisplayDrivers/';

# double check in case optimization is disabled
kbs = get_kb_list(kb_base + '*/Name');
if (isnull(kbs)) exit(0, 'No display drivers were found.');

report = '';

foreach kb (keys(kbs))
{
  name = kbs[kb];
  # only check NVIDIA drivers
  if ("NVIDIA" >!< name) continue;

  nvidia_found = TRUE;
  id = kb - kb_base - '/Name';
  version = get_kb_item_or_exit(kb_base + id + '/Version');
  driver_date = get_kb_item_or_exit(kb_base + id + '/DriverDate');

  disp_driver_date = driver_date;

  # convert to something we can pass to ver_compare (YYYY.MM.DD)
  driver_date = split(driver_date, sep:'/', keep:FALSE);
  driver_date = driver_date[2] + '.' + driver_date[0] + '.' + driver_date[1];
  fix = NULL;
  if (version =~ "^38(4|5|6)\." && ver_compare(ver:version, fix:"386.28", strict:FALSE) == -1) fix = "386.28";
  else if (version =~ "^39(0|1)\." && ver_compare(ver:version, fix:"391.29", strict:FALSE) == -1) fix = "391.29";
  
  if(!isnull(fix))
  {
    order = make_list('Device name','Driver version','Driver date','Fixed version');
    report = make_array(
      order[0],name,
      order[1],version,
      order[2],disp_driver_date,
      order[3],fix
      );

    report = report_items_str(report_items:report, ordered_fields:order);
    security_report_v4(severity:SECURITY_HOLE, port:0, extra:report);
    exit(0);
  }
  else
  {
    exit(0, "No vulnerable NVIDIA display drivers were found.");
  }
}

exit(0, 'No NVIDIA display drivers were found.');

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2018-991.
#

include("compat.inc");

if (description)
{
  script_id(108852);
  script_version("1.4");
  script_cvs_date("Date: 2018/08/31 12:25:01");

  script_cve_id("CVE-2018-6247", "CVE-2018-6248", "CVE-2018-6249", "CVE-2018-6250", "CVE-2018-6251", "CVE-2018-6252", "CVE-2018-6253");
  script_xref(name:"ALAS", value:"2018-991");

  script_name(english:"Amazon Linux AMI : nvidia (ALAS-2018-991)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Amazon Linux AMI host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"NVIDIA Windows GPU Display Driver contains a vulnerability in the
kernel mode layer (nvlddmkm.sys) handler for DxgkDdiEscape where a
NULL pointer dereference may lead to denial of service or possible
escalation of privileges. (CVE-2018-6247)

NVIDIA Windows GPU Display Driver contains a vulnerability in the
kernel mode layer handler for DxgkDdiEscape where the software uses a
sequential operation to read or write a buffer, but it uses an
incorrect length value that causes it to access memory that is outside
of the bounds of the buffer which may lead to denial of service or
possible escalation of privileges. (CVE-2018-6248)

NVIDIA GPU Display Driver contains a vulnerability in kernel mode
layer handler where a NULL pointer dereference may lead to denial of
service or potential escalation of privileges. (CVE-2018-6249)

NVIDIA Windows GPU Display Driver contains a vulnerability in the
kernel mode layer (nvlddmkm.sys) handler for DxgkDdiEscape where a
NULL pointer dereference occurs, which may lead to denial of service
or possible escalation of privileges. (CVE-2018-6250)

NVIDIA Windows GPU Display Driver contains a vulnerability in the
DirectX 10 Usermode driver, where a specially crafted pixel shader can
cause writing to unallocated memory, leading to denial of service or
potential code execution. (CVE-2018-6251)

NVIDIA Windows GPU Display Driver contains a vulnerability in the
kernel mode layer handler for DxgkDdiEscape where the software allows
an actor access to restricted functionality that is unnecessary for
production usage, and which may result in denial of service.
(CVE-2018-6252)

NVIDIA GPU Display Driver contains a vulnerability in the DirectX and
OpenGL Usermode drivers where a specially crafted pixel shader can
cause infinite recursion leading to denial of service. (CVE-2018-6253)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2018-991.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum update nvidia' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nvidia");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nvidia-dkms");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/06");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Amazon Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (rpm_check(release:"ALA", cpu:"x86_64", reference:"nvidia-384.125-2017.09.109.amzn1")) flag++;
if (rpm_check(release:"ALA", cpu:"x86_64", reference:"nvidia-dkms-384.125-2017.09.109.amzn1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "nvidia / nvidia-dkms");
}