Ubuntu 16.04 LTS : linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities (USN-3776-1)

2018-10-02T00:00:00
ID UBUNTU_USN-3776-1.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 2020-07-02T00:00:00

Description

Jann Horn discovered that the vmacache subsystem did not properly handle sequence number overflows, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2018-17182)

It was discovered that the paravirtualization implementation in the Linux kernel did not properly handle some indirect calls, reducing the effectiveness of Spectre v2 mitigations for paravirtual guests. A local attacker could use this to expose sensitive information. (CVE-2018-15594)

It was discovered that microprocessors utilizing speculative execution and prediction of return addresses via Return Stack Buffer (RSB) may allow unauthorized memory reads via sidechannel attacks. An attacker could use this to expose sensitive information. (CVE-2018-15572)

It was discovered that a NULL pointer dereference could be triggered in the OCFS2 file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-18216)

It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10902)

It was discovered that a stack-based buffer overflow existed in the iSCSI target implementation of the Linux kernel. A remote attacker could use this to cause a denial of service (system crash). (CVE-2018-14633)

It was discovered that the YUREX USB device driver for the Linux kernel did not properly restrict user space reads or writes. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-16276)

It was discovered that a memory leak existed in the IRDA subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2018-6554)

It was discovered that a use-after-free vulnerability existed in the IRDA 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-2018-6555).

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-3776-1. 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(117870);
  script_version("1.7");
  script_cvs_date("Date: 2019/09/18 12:31:48");

  script_cve_id("CVE-2017-18216", "CVE-2018-10902", "CVE-2018-14633", "CVE-2018-15572", "CVE-2018-15594", "CVE-2018-16276", "CVE-2018-17182", "CVE-2018-6554", "CVE-2018-6555");
  script_xref(name:"USN", value:"3776-1");

  script_name(english:"Ubuntu 16.04 LTS : linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities (USN-3776-1)");
  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:
"Jann Horn discovered that the vmacache subsystem did not properly
handle sequence number overflows, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of
service (system crash) or execute arbitrary code. (CVE-2018-17182)

It was discovered that the paravirtualization implementation in the
Linux kernel did not properly handle some indirect calls, reducing the
effectiveness of Spectre v2 mitigations for paravirtual guests. A
local attacker could use this to expose sensitive information.
(CVE-2018-15594)

It was discovered that microprocessors utilizing speculative execution
and prediction of return addresses via Return Stack Buffer (RSB) may
allow unauthorized memory reads via sidechannel attacks. An attacker
could use this to expose sensitive information. (CVE-2018-15572)

It was discovered that a NULL pointer dereference could be triggered
in the OCFS2 file system implementation in the Linux kernel. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2017-18216)

It was discovered that a race condition existed in the raw MIDI driver
for the Linux kernel, leading to a double free vulnerability. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2018-10902)

It was discovered that a stack-based buffer overflow existed in the
iSCSI target implementation of the Linux kernel. A remote attacker
could use this to cause a denial of service (system crash).
(CVE-2018-14633)

It was discovered that the YUREX USB device driver for the Linux
kernel did not properly restrict user space reads or writes. A
physically proximate attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code.
(CVE-2018-16276)

It was discovered that a memory leak existed in the IRDA subsystem of
the Linux kernel. A local attacker could use this to cause a denial of
service (kernel memory exhaustion). (CVE-2018-6554)

It was discovered that a use-after-free vulnerability existed in the
IRDA 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-2018-6555).

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/3776-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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: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-4.4-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-raspi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-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-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-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:16.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/02");
  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:"^(16\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04", "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-2017-18216", "CVE-2018-10902", "CVE-2018-14633", "CVE-2018-15572", "CVE-2018-15594", "CVE-2018-16276", "CVE-2018-17182", "CVE-2018-6554", "CVE-2018-6555");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for USN-3776-1");
  }
  else
  {
    _ubuntu_report = ksplice_reporting_text();
  }
}

flag = 0;

if (ubuntu_check(osver:"16.04", pkgname:"linux-image-4.4.0-1035-kvm", pkgver:"4.4.0-1035.41")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-4.4.0-1069-aws", pkgver:"4.4.0-1069.79")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-4.4.0-1098-raspi2", pkgver:"4.4.0-1098.106")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-4.4.0-1102-snapdragon", pkgver:"4.4.0-1102.107")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-4.4.0-137-generic", pkgver:"4.4.0-137.163")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-4.4.0-137-generic-lpae", pkgver:"4.4.0-137.163")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-4.4.0-137-lowlatency", pkgver:"4.4.0-137.163")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-aws", pkgver:"4.4.0.1069.71")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-generic", pkgver:"4.4.0.137.143")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-generic-lpae", pkgver:"4.4.0.137.143")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-kvm", pkgver:"4.4.0.1035.34")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-lowlatency", pkgver:"4.4.0.137.143")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-raspi2", pkgver:"4.4.0.1098.98")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-snapdragon", pkgver:"4.4.0.1102.94")) 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-4.4-aws / linux-image-4.4-generic / etc");
}