Ubuntu 18.04 LTS : linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2 (USN-3762-1)

2018-09-12T00:00:00
ID UBUNTU_USN-3762-1.NASL
Type nessus
Reporter Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-04-02T00:00:00

Description

It was discovered that the VirtIO subsystem in the Linux kernel did not properly initialize memory in some situations. A local attacker could use this to possibly expose sensitive information (kernel memory). (CVE-2018-1118)

Seunghun Han discovered an information leak in the ACPI handling code in the Linux kernel when handling early termination of ACPI table loading. A local attacker could use this to expose sensitive informal (kernel address locations). (CVE-2017-13695).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3762-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(117454);
  script_version("1.5");
  script_cvs_date("Date: 2019/09/18 12:31:48");

  script_cve_id("CVE-2017-13695", "CVE-2018-1118");
  script_xref(name:"USN", value:"3762-1");

  script_name(english:"Ubuntu 18.04 LTS : linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2 (USN-3762-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that the VirtIO subsystem in the Linux kernel did
not properly initialize memory in some situations. A local attacker
could use this to possibly expose sensitive information (kernel
memory). (CVE-2018-1118)

Seunghun Han discovered an information leak in the ACPI handling code
in the Linux kernel when handling early termination of ACPI table
loading. A local attacker could use this to expose sensitive informal
(kernel address locations). (CVE-2017-13695).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/3762-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-raspi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15-snapdragon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-azure-edge");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-gke");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-snapdragon");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/09/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("ksplice.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(18\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 18.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

if (get_one_kb_item("Host/ksplice/kernel-cves"))
{
  rm_kb_item(name:"Host/uptrack-uname-r");
  cve_list = make_list("CVE-2017-13695", "CVE-2018-1118");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for USN-3762-1");
  }
  else
  {
    _ubuntu_report = ksplice_reporting_text();
  }
}

flag = 0;

if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-1019-gcp", pkgver:"4.15.0-1019.20")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-1021-aws", pkgver:"4.15.0-1021.21")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-1021-kvm", pkgver:"4.15.0-1021.21")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-1022-raspi2", pkgver:"4.15.0-1022.24")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-1023-azure", pkgver:"4.15.0-1023.24")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-34-generic", pkgver:"4.15.0-34.37")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-34-generic-lpae", pkgver:"4.15.0-34.37")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-34-lowlatency", pkgver:"4.15.0-34.37")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-4.15.0-34-snapdragon", pkgver:"4.15.0-34.37")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-aws", pkgver:"4.15.0.1021.21")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-azure", pkgver:"4.15.0.1023.23")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-azure-edge", pkgver:"4.15.0.1023.23")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-gcp", pkgver:"4.15.0.1019.21")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-generic", pkgver:"4.15.0.34.36")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-generic-lpae", pkgver:"4.15.0.34.36")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-gke", pkgver:"4.15.0.1019.21")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-kvm", pkgver:"4.15.0.1021.21")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-lowlatency", pkgver:"4.15.0.34.36")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-raspi2", pkgver:"4.15.0.1022.20")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-snapdragon", pkgver:"4.15.0.34.36")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "linux-image-4.15-aws / linux-image-4.15-azure / etc");
}