openSUSE 15 Security Update : qemu (openSUSE-SU-2021:1202-1)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# openSUSE Security Update openSUSE-SU-2021:1202-1. The text itself
# is copyright (C) SUSE.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(152876);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/01");

  script_cve_id(
    "CVE-2020-35503",
    "CVE-2020-35504",
    "CVE-2020-35505",
    "CVE-2020-35506",
    "CVE-2021-3527",
    "CVE-2021-3582",
    "CVE-2021-3592",
    "CVE-2021-3593",
    "CVE-2021-3594",
    "CVE-2021-3595",
    "CVE-2021-3607",
    "CVE-2021-3608",
    "CVE-2021-3611",
    "CVE-2021-3682",
    "CVE-2021-20255"
  );

  script_name(english:"openSUSE 15 Security Update : qemu (openSUSE-SU-2021:1202-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in
the openSUSE-SU-2021:1202-1 advisory.

  - A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in
    versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function
    while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the
    host, resulting in a denial of service. The highest threat from this vulnerability is to system
    availability. (CVE-2020-35503)

  - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.
    This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of
    service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)

  - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in
    versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw
    allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.
    The highest threat from this vulnerability is to system availability. (CVE-2020-35505)

  - A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU in
    versions before 6.0.0 during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows
    a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or
    potential code execution with the privileges of the QEMU process. (CVE-2020-35506)

  - A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator
    of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw
    allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a
    denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20255)

  - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a
    single, large transfer request, to reduce the overhead and improve performance. The combined size of the
    bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper
    validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the
    array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a
    denial of service. (CVE-2021-3527)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw
    exists in the bootp_input() function and could occur while processing a udp packet that is smaller than
    the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of
    uninitialized heap memory from the host. The highest threat from this vulnerability is to data
    confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw
    exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the
    size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory
    disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw
    affects libslirp versions prior to 4.6.0. (CVE-2021-3593)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw
    exists in the udp_input() function and could occur while processing a udp packet that is smaller than the
    size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory
    disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw
    affects libslirp versions prior to 4.6.0. (CVE-2021-3594)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw
    exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the
    size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory
    disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw
    affects libslirp versions prior to 4.6.0. (CVE-2021-3595)

  - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs
    when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A
    malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,
    resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the
    host. (CVE-2021-3682)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1180432");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1180433");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1180434");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1180435");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1182651");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1186012");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187364");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187365");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187366");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187367");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187499");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187529");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187538");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187539");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1189145");
  # https://lists.opensuse.org/archives/list/[email protected]/thread/7XTOHNMISPT4N5NUXQJPKV5LQNNGSMFI/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?94d4d6d1");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-35503");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-35504");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-35505");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-35506");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-20255");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3527");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3582");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3592");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3593");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3594");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3595");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3607");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3608");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3611");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3682");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/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-2021-3682");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/03/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/08/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-audio-alsa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-audio-pa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-audio-sdl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-dmg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-gluster");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-iscsi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-nfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-ssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ipxe");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ksm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-lang");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-linux-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-microvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ppc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-s390");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-seabios");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-sgabios");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-testsuite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ui-curses");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ui-gtk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ui-sdl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ui-spice-app");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-vgabios");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-vhost-user-gpu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-x86");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.2");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/SuSE/release');
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, 'openSUSE');
var os_ver = pregmatch(pattern: "^SUSE([\d.]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'openSUSE');
os_ver = os_ver[1];
if (release !~ "^(SUSE15\.2)$") audit(AUDIT_OS_RELEASE_NOT, 'openSUSE', '15.2', release);
if (!get_kb_item("Host/SuSE/rpm-list")) 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, 'openSUSE ' + os_ver, cpu);

var pkgs = [
    {'reference':'qemu-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-arm-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-audio-alsa-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-audio-pa-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-audio-sdl-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-block-curl-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-block-dmg-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-block-gluster-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-block-iscsi-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-block-nfs-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-block-rbd-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-block-ssh-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-extra-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-guest-agent-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-ipxe-1.0.0+-lp152.9.20.1', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-ksm-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-kvm-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-lang-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-linux-user-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-microvm-4.2.1-lp152.9.20.1', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-ppc-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-s390-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-seabios-1.12.1+-lp152.9.20.1', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-sgabios-8-lp152.9.20.1', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-testsuite-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-tools-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-ui-curses-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-ui-gtk-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-ui-sdl-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-ui-spice-app-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-vgabios-1.12.1+-lp152.9.20.1', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-vhost-user-gpu-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'qemu-x86-4.2.1-lp152.9.20.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var cpu = NULL;
  var rpm_spec_vers_cmp = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (reference && release) {
    if (rpm_check(release:release, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'qemu / qemu-arm / qemu-audio-alsa / qemu-audio-pa / qemu-audio-sdl / etc');
}