Vulnerabilities > CVE-2019-15791 - Integer Underflow (Wrap or Wraparound) vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4183-1. 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(130963);
  script_version("1.2");
  script_cvs_date("Date: 2019/12/12");

  script_cve_id("CVE-2018-12207", "CVE-2019-0154", "CVE-2019-0155", "CVE-2019-11135", "CVE-2019-15791", "CVE-2019-15792", "CVE-2019-15793", "CVE-2019-16746", "CVE-2019-17666");
  script_xref(name:"USN", value:"4183-1");

  script_name(english:"Ubuntu 19.10 : linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oracle, (USN-4183-1)");
  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:
"Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro
Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi
Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van
Bulck discovered that Intel processors using Transactional
Synchronization Extensions (TSX) could expose memory contents
previously stored in microarchitectural buffers to a malicious process
that is executing on the same CPU core. A local attacker could use
this to expose sensitive information. (CVE-2019-11135)

It was discovered that the Intel i915 graphics chipsets allowed
userspace to modify page table entries via writes to MMIO from the
Blitter Command Streamer and expose kernel memory information. A local
attacker could use this to expose sensitive information or possibly
elevate privileges. (CVE-2019-0155)

Deepak Gupta discovered that on certain Intel processors, the Linux
kernel did not properly perform invalidation on page table updates by
virtual guest operating systems. A local attacker in a guest VM could
use this to cause a denial of service (host system crash).
(CVE-2018-12207)

It was discovered that the Intel i915 graphics chipsets could cause a
system hang when userspace performed a read from GT memory mapped
input output (MMIO) when the product is in certain low power states. A
local attacker could use this to cause a denial of service.
(CVE-2019-0154)

Jann Horn discovered a reference count underflow in the shiftfs
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-15791)

Jann Horn discovered a type confusion vulnerability in the shiftfs
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-15792)

Jann Horn discovered that the shiftfs implementation in the Linux
kernel did not use the correct file system uid/gid when the user
namespace of a lower file system is not in the init user namespace. A
local attacker could use this to possibly bypass DAC permissions or
have some other unspecified impact. (CVE-2019-15793)

It was discovered that a buffer overflow existed in the 802.11 Wi-Fi
configuration interface for the Linux kernel when handling beacon
settings. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-16746)

Nico Waisman discovered that a buffer overflow existed in the Realtek
Wi-Fi driver for the Linux kernel when handling Notice of Absence
frames. A physically proximate attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2019-17666).

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/4183-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-17666");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-raspi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-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-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-oracle");
  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:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/13");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 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:"^(19\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 19.10", "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-2018-12207", "CVE-2019-0154", "CVE-2019-0155", "CVE-2019-11135", "CVE-2019-15791", "CVE-2019-15792", "CVE-2019-15793", "CVE-2019-16746", "CVE-2019-17666");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for USN-4183-1");
  }
  else
  {
    _ubuntu_report = ksplice_reporting_text();
  }
}

flag = 0;

if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-1006-oracle", pkgver:"5.3.0-1006.7")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-1007-aws", pkgver:"5.3.0-1007.8")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-1007-azure", pkgver:"5.3.0-1007.8")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-1007-kvm", pkgver:"5.3.0-1007.8")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-1008-gcp", pkgver:"5.3.0-1008.9")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-1012-raspi2", pkgver:"5.3.0-1012.14")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-22-generic", pkgver:"5.3.0-22.24")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-22-generic-lpae", pkgver:"5.3.0-22.24")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-22-lowlatency", pkgver:"5.3.0-22.24")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-22-snapdragon", pkgver:"5.3.0-22.24")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-aws", pkgver:"5.3.0.1007.9")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-azure", pkgver:"5.3.0.1007.25")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-gcp", pkgver:"5.3.0.1008.9")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-generic", pkgver:"5.3.0.22.26")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-generic-lpae", pkgver:"5.3.0.22.26")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-gke", pkgver:"5.3.0.1008.9")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-kvm", pkgver:"5.3.0.1007.9")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-lowlatency", pkgver:"5.3.0.22.26")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-oracle", pkgver:"5.3.0.1006.7")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-raspi2", pkgver:"5.3.0.1012.9")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-snapdragon", pkgver:"5.3.0.22.26")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-virtual", pkgver:"5.3.0.22.26")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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-5.3-aws / linux-image-5.3-azure / linux-image-5.3-gcp / etc");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4183-2. 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(131011);
  script_version("1.2");
  script_cvs_date("Date: 2019/12/12");

  script_cve_id("CVE-2018-12207", "CVE-2019-0154", "CVE-2019-0155", "CVE-2019-11135", "CVE-2019-15791", "CVE-2019-15792", "CVE-2019-15793", "CVE-2019-16746", "CVE-2019-17666");
  script_xref(name:"USN", value:"4183-2");

  script_name(english:"Ubuntu 19.10 : linux vulnerability (USN-4183-2)");
  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:
"USN-4183-1 fixed vulnerabilities in the Linux kernel. It was
discovered that the kernel fix for CVE-2019-0155 (i915 missing Blitter
Command Streamer check) was incomplete on 64-bit Intel x86 systems.
This update addresses the issue.

We apologize for the inconvenience.

Original advisory details :

Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro
Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi
Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van
Bulck discovered that Intel processors using Transactional
Synchronization Extensions (TSX) could expose memory contents
previously stored in microarchitectural buffers to a malicious process
that is executing on the same CPU core. A local attacker could use
this to expose sensitive information. (CVE-2019-11135)

It was discovered that the Intel i915 graphics chipsets
allowed userspace to modify page table entries via writes to
MMIO from the Blitter Command Streamer and expose kernel
memory information. A local attacker could use this to
expose sensitive information or possibly elevate privileges.
(CVE-2019-0155)

Deepak Gupta discovered that on certain Intel processors,
the Linux kernel did not properly perform invalidation on
page table updates by virtual guest operating systems. A
local attacker in a guest VM could use this to cause a
denial of service (host system crash). (CVE-2018-12207)

It was discovered that the Intel i915 graphics chipsets
could cause a system hang when userspace performed a read
from GT memory mapped input output (MMIO) when the product
is in certain low power states. A local attacker could use
this to cause a denial of service. (CVE-2019-0154)

Jann Horn discovered a reference count underflow in the
shiftfs implementation in the Linux kernel. A local attacker
could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2019-15791)

Jann Horn discovered a type confusion vulnerability in the
shiftfs implementation in the Linux kernel. A local attacker
could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2019-15792)

Jann Horn discovered that the shiftfs implementation in the
Linux kernel did not use the correct file system uid/gid
when the user namespace of a lower file system is not in the
init user namespace. A local attacker could use this to
possibly bypass DAC permissions or have some other
unspecified impact. (CVE-2019-15793)

It was discovered that a buffer overflow existed in the
802.11 Wi-Fi configuration interface for the Linux kernel
when handling beacon settings. A local attacker could use
this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-16746)

Nico Waisman discovered that a buffer overflow existed in
the Realtek Wi-Fi driver for the Linux kernel when handling
Notice of Absence frames. A physically proximate attacker
could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2019-17666).

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/4183-2/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-17666");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-snapdragon");
  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-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-snapdragon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/14");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 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:"^(19\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 19.10", "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-2018-12207", "CVE-2019-0154", "CVE-2019-0155", "CVE-2019-11135", "CVE-2019-15791", "CVE-2019-15792", "CVE-2019-15793", "CVE-2019-16746", "CVE-2019-17666");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for USN-4183-2");
  }
  else
  {
    _ubuntu_report = ksplice_reporting_text();
  }
}

flag = 0;

if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-23-generic", pkgver:"5.3.0-23.25")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-23-generic-lpae", pkgver:"5.3.0-23.25")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-23-lowlatency", pkgver:"5.3.0-23.25")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-5.3.0-23-snapdragon", pkgver:"5.3.0-23.25")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-generic", pkgver:"5.3.0.23.27")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-generic-lpae", pkgver:"5.3.0.23.27")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-lowlatency", pkgver:"5.3.0.23.27")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-snapdragon", pkgver:"5.3.0.23.27")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"linux-image-virtual", pkgver:"5.3.0.23.27")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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-5.3-generic / linux-image-5.3-generic-lpae / etc");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4184-1. 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(130964);
  script_version("1.2");
  script_cvs_date("Date: 2019/12/12");

  script_cve_id("CVE-2018-12207", "CVE-2019-0154", "CVE-2019-0155", "CVE-2019-11135", "CVE-2019-15098", "CVE-2019-15791", "CVE-2019-15792", "CVE-2019-15793", "CVE-2019-17052", "CVE-2019-17053", "CVE-2019-17054", "CVE-2019-17055", "CVE-2019-17056", "CVE-2019-17666");
  script_xref(name:"USN", value:"4184-1");

  script_name(english:"Ubuntu 18.04 LTS / 19.04 : linux, linux-aws, linux-azure, linux-gcp, linux-gke-5.0, linux-hwe, (USN-4184-1)");
  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:
"Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro
Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi
Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van
Bulck discovered that Intel processors using Transactional
Synchronization Extensions (TSX) could expose memory contents
previously stored in microarchitectural buffers to a malicious process
that is executing on the same CPU core. A local attacker could use
this to expose sensitive information. (CVE-2019-11135)

It was discovered that the Intel i915 graphics chipsets allowed
userspace to modify page table entries via writes to MMIO from the
Blitter Command Streamer and expose kernel memory information. A local
attacker could use this to expose sensitive information or possibly
elevate privileges. (CVE-2019-0155)

Deepak Gupta discovered that on certain Intel processors, the Linux
kernel did not properly perform invalidation on page table updates by
virtual guest operating systems. A local attacker in a guest VM could
use this to cause a denial of service (host system crash).
(CVE-2018-12207)

It was discovered that the Intel i915 graphics chipsets could cause a
system hang when userspace performed a read from GT memory mapped
input output (MMIO) when the product is in certain low power states. A
local attacker could use this to cause a denial of service.
(CVE-2019-0154)

Hui Peng discovered that the Atheros AR6004 USB Wi-Fi device driver
for the Linux kernel did not properly validate endpoint descriptors
returned by the device. A physically proximate attacker could use this
to cause a denial of service (system crash). (CVE-2019-15098)

Jann Horn discovered a reference count underflow in the shiftfs
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-15791)

Jann Horn discovered a type confusion vulnerability in the shiftfs
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-15792)

Jann Horn discovered that the shiftfs implementation in the Linux
kernel did not use the correct file system uid/gid when the user
namespace of a lower file system is not in the init user namespace. A
local attacker could use this to possibly bypass DAC permissions or
have some other unspecified impact. (CVE-2019-15793)

Ori Nimron discovered that the AX25 network protocol implementation in
the Linux kernel did not properly perform permissions checks. A local
attacker could use this to create a raw socket. (CVE-2019-17052)

Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network
protocol implementation in the Linux kernel did not properly perform
permissions checks. A local attacker could use this to create a raw
socket. (CVE-2019-17053)

Ori Nimron discovered that the Appletalk network protocol
implementation in the Linux kernel did not properly perform
permissions checks. A local attacker could use this to create a raw
socket. (CVE-2019-17054)

Ori Nimron discovered that the modular ISDN network protocol
implementation in the Linux kernel did not properly perform
permissions checks. A local attacker could use this to create a raw
socket. (CVE-2019-17055)

Ori Nimron discovered that the Near field Communication (NFC) network
protocol implementation in the Linux kernel did not properly perform
permissions checks. A local attacker could use this to create a raw
socket. (CVE-2019-17056)

Nico Waisman discovered that a buffer overflow existed in the Realtek
Wi-Fi driver for the Linux kernel when handling Notice of Absence
frames. A physically proximate attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2019-17666).

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/4184-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-gke");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-oem-osp1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0-raspi2");
  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-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-hwe-18.04");
  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-generic-lpae-hwe-18.04");
  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-gke-5.0");
  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-lowlatency-hwe-18.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-osp1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle");
  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-hwe-18.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-18.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/08/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/13");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 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|19\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 18.04 / 19.04", "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-2018-12207", "CVE-2019-0154", "CVE-2019-0155", "CVE-2019-11135", "CVE-2019-15098", "CVE-2019-15791", "CVE-2019-15792", "CVE-2019-15793", "CVE-2019-17052", "CVE-2019-17053", "CVE-2019-17054", "CVE-2019-17055", "CVE-2019-17056", "CVE-2019-17666");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for USN-4184-1");
  }
  else
  {
    _ubuntu_report = ksplice_reporting_text();
  }
}

flag = 0;

if (ubuntu_check(osver:"18.04", pkgname:"linux-image-5.0.0-1025-azure", pkgver:"5.0.0-1025.27~18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-5.0.0-1025-gcp", pkgver:"5.0.0-1025.26~18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-5.0.0-1025-gke", pkgver:"5.0.0-1025.26~18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-5.0.0-1027-oem-osp1", pkgver:"5.0.0-1027.31")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-5.0.0-35-generic", pkgver:"5.0.0-35.38~18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-5.0.0-35-generic-lpae", pkgver:"5.0.0-35.38~18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-5.0.0-35-lowlatency", pkgver:"5.0.0-35.38~18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-azure", pkgver:"5.0.0.1025.36")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-gcp", pkgver:"5.0.0.1025.29")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-generic-hwe-18.04", pkgver:"5.0.0.35.93")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-generic-lpae-hwe-18.04", pkgver:"5.0.0.35.93")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-gke-5.0", pkgver:"5.0.0.1025.14")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-lowlatency-hwe-18.04", pkgver:"5.0.0.35.93")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-oem-osp1", pkgver:"5.0.0.1027.31")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-snapdragon-hwe-18.04", pkgver:"5.0.0.35.93")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"linux-image-virtual-hwe-18.04", pkgver:"5.0.0.35.93")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-1007-oracle", pkgver:"5.0.0-1007.12")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-1021-aws", pkgver:"5.0.0-1021.24")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-1022-kvm", pkgver:"5.0.0-1022.24")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-1022-raspi2", pkgver:"5.0.0-1022.23")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-1025-azure", pkgver:"5.0.0-1025.27")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-1025-gcp", pkgver:"5.0.0-1025.26")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-35-generic", pkgver:"5.0.0-35.38")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-35-generic-lpae", pkgver:"5.0.0-35.38")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-5.0.0-35-lowlatency", pkgver:"5.0.0-35.38")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-aws", pkgver:"5.0.0.1021.23")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-azure", pkgver:"5.0.0.1025.25")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-gcp", pkgver:"5.0.0.1025.50")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-generic", pkgver:"5.0.0.35.37")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-generic-lpae", pkgver:"5.0.0.35.37")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-gke", pkgver:"5.0.0.1025.50")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-kvm", pkgver:"5.0.0.1022.23")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-lowlatency", pkgver:"5.0.0.35.37")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-oracle", pkgver:"5.0.0.1007.33")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-raspi2", pkgver:"5.0.0.1022.20")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"linux-image-virtual", pkgver:"5.0.0.35.37")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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-5.0-aws / linux-image-5.0-azure / linux-image-5.0-gcp / etc");
}