Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : QEMU vulnerabilities (USN-4467-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4467-1. 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(139725);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id(
    "CVE-2020-10756",
    "CVE-2020-10761",
    "CVE-2020-12829",
    "CVE-2020-13253",
    "CVE-2020-13361",
    "CVE-2020-13362",
    "CVE-2020-13659",
    "CVE-2020-13754",
    "CVE-2020-13765",
    "CVE-2020-13800",
    "CVE-2020-14415",
    "CVE-2020-15863",
    "CVE-2020-16092"
  );
  script_xref(name:"USN", value:"4467-1");
  script_xref(name:"IAVB", value:"2020-B-0041-S");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : QEMU vulnerabilities (USN-4467-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"Ziming Zhang and VictorV discovered that the QEMU SLiRP networking
implementation incorrectly handled replying to certain ICMP echo
requests. An attacker inside a guest could possibly use this issue to
leak host memory to obtain sensitive information. This issue only
affected Ubuntu 18.04 LTS. (CVE-2020-10756) Eric Blake and Xueqiang
Wei discovered that the QEMU NDB implementation incorrectly handled
certain requests. A remote attacker could possibly use this issue to
cause QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 20.04 LTS. (CVE-2020-10761) Ziming Zhang discovered
that the QEMU SM501 graphics driver incorrectly handled certain
operations. An attacker inside a guest could use this issue to cause
QEMU to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2020-12829) It was discovered that the QEMU SD
memory card implementation incorrectly handled certain memory
operations. An attacker inside a guest could possibly use this issue
to cause QEMU to crash, resulting in a denial of service.
(CVE-2020-13253) Ren Ding and Hanqing Zhao discovered that the QEMU
ES1370 audio driver incorrectly handled certain invalid frame counts.
An attacker inside a guest could possibly use this issue to cause QEMU
to crash, resulting in a denial of service. (CVE-2020-13361) Ren Ding
and Hanqing Zhao discovered that the QEMU MegaRAID SAS SCSI driver
incorrectly handled certain memory operations. An attacker inside a
guest could possibly use this issue to cause QEMU to crash, resulting
in a denial of service. (CVE-2020-13362) Alexander Bulekov discovered
that QEMU MegaRAID SAS SCSI driver incorrectly handled certain memory
space operations. An attacker inside a guest could possibly use this
issue to cause QEMU to crash, resulting in a denial of service.
(CVE-2020-13659) Ren Ding, Hanqing Zhao, Alexander Bulekov, and
Anatoly Trosinenko discovered that the QEMU incorrectly handled
certain msi-x mmio operations. An attacker inside a guest could
possibly use this issue to cause QEMU to crash, resulting in a denial
of service. (CVE-2020-13754) It was discovered that QEMU incorrectly
handled certain memory copy operations when loading ROM contents. If a
user were tricked into running an untrusted kernel image, a remote
attacker could possibly use this issue to run arbitrary code. This
issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
(CVE-2020-13765) Ren Ding, Hanqing Zhao, and Yi Ren discovered that
the QEMU ATI video driver incorrectly handled certain index values. An
attacker inside a guest could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected
Ubuntu 20.04 LTS. (CVE-2020-13800) Ziming Zhang discovered that the
QEMU OSS audio driver incorrectly handled certain operations. An
attacker inside a guest could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected
Ubuntu 20.04 LTS. (CVE-2020-14415) Ziming Zhang discovered that the
QEMU XGMAC Ethernet controller incorrectly handled packet
transmission. An attacker inside a guest could use this issue to cause
QEMU to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2020-15863) Ziming Zhang discovered that the QEMU
e1000e Ethernet controller incorrectly handled packet processing. An
attacker inside a guest could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected
Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-16092).

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://ubuntu.com/security/notices/USN-4467-1");
  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:P");
  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:H/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-2020-13765");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-13754");

  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:"2020/05/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/08/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-block-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-aarch64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-gui");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-mips");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-misc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-ppc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-s390x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-sparc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-x86");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-x86-microvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-x86-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-user-binfmt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-user-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  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:20.04:-:lts");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2020-2023 Canonical, Inc. / NASL script (C) 2020-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '16.04', 'pkgname': 'qemu', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-block-extra', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-kvm', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-aarch64', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-arm', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-common', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-mips', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-misc', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-s390x', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-system-x86', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-user', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-user-binfmt', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-user-static', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '16.04', 'pkgname': 'qemu-utils', 'pkgver': '1:2.5+dfsg-5ubuntu10.45'},
    {'osver': '18.04', 'pkgname': 'qemu', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-block-extra', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-kvm', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system-arm', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system-common', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system-mips', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system-misc', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system-s390x', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-system-x86', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-user', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-user-binfmt', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-user-static', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '18.04', 'pkgname': 'qemu-utils', 'pkgver': '1:2.11+dfsg-1ubuntu7.31'},
    {'osver': '20.04', 'pkgname': 'qemu', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-block-extra', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-kvm', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-arm', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-common', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-data', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-gui', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-mips', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-misc', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-s390x', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-x86', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-x86-microvm', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-system-x86-xen', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-user', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-user-binfmt', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-user-static', 'pkgver': '1:4.2-3ubuntu6.4'},
    {'osver': '20.04', 'pkgname': 'qemu-utils', 'pkgver': '1:4.2-3ubuntu6.4'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'qemu / qemu-block-extra / qemu-guest-agent / qemu-kvm / qemu-system / etc');
}