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nessusThis script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.ALMA_LINUX_ALSA-2022-7967.NASL
HistoryNov 19, 2022 - 12:00 a.m.

AlmaLinux 9 : qemu-kvm (ALSA-2022:7967)

2022-11-1900:00:00
This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
3

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2022:7967 advisory.

  • A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory. (CVE-2021-3507)

  • A stack overflow vulnerability was found in the Intel HD Audio device (intel-hda) of QEMU. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability. This flaw affects QEMU versions prior to 7.0.0. (CVE-2021-3611)

  • A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controllerโ€™s registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0. (CVE-2021-3750)

  • A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition. (CVE-2021-4158)

Note that Nessus has not tested for these issues but has instead relied only on the applicationโ€™s self-reported version number.

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2022:7967.
##

include('compat.inc');

if (description)
{
  script_id(167956);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/03");

  script_cve_id(
    "CVE-2021-3507",
    "CVE-2021-3611",
    "CVE-2021-3750",
    "CVE-2021-4158"
  );
  script_xref(name:"ALSA", value:"2022:7967");

  script_name(english:"AlmaLinux 9 : qemu-kvm (ALSA-2022:7967)");

  script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-2022:7967 advisory.

  - A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could
    occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the
    floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on
    the host resulting in DoS scenario, or potential information leakage from the host memory. (CVE-2021-3507)

  - A stack overflow vulnerability was found in the Intel HD Audio device (intel-hda) of QEMU. A malicious
    guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service
    condition. The highest threat from this vulnerability is to system availability. This flaw affects QEMU
    versions prior to 7.0.0. (CVE-2021-3611)

  - A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the
    Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be
    written to the controller's registers and trigger undesirable actions (such as reset) while the device is
    still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could
    use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or
    potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects
    QEMU versions before 7.0.0. (CVE-2021-3750)

  - A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within
    the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service
    condition. (CVE-2021-4158)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://errata.almalinux.org/9/ALSA-2022-7967.html");
  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:P/A:P");
  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:H/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-2021-3750");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(119, 416, 476, 787);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/05/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/11/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/11/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-img");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-audio-pa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-block-curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-block-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-gpu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-gpu-ccw");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-gpu-gl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-gpu-pci");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-gpu-pci-gl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-vga");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-vga-gl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-usb-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-device-usb-redirect");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-ui-egl-headless");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-kvm-ui-opengl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:qemu-pr-helper");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::appstream");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/AlmaLinux/release');
if (isnull(os_release) || 'AlmaLinux' >!< os_release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
os_ver = os_ver[1];
if (! preg(pattern:"^9([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 9.x', 'AlmaLinux ' + os_ver);

if (!get_kb_item('Host/AlmaLinux/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, 'AlmaLinux', cpu);

var pkgs = [
    {'reference':'qemu-guest-agent-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-guest-agent-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-img-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-img-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-audio-pa-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-audio-pa-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-block-curl-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-block-curl-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-block-rbd-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-block-rbd-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-common-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-common-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-core-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-core-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-ccw-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-ccw-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-gl-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-gl-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-pci-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-pci-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-pci-gl-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-gpu-pci-gl-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-vga-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-vga-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-vga-gl-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-display-virtio-vga-gl-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-usb-host-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-usb-host-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-usb-redirect-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-device-usb-redirect-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-docs-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-docs-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-tools-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-tools-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-ui-egl-headless-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-ui-egl-headless-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-ui-opengl-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-kvm-ui-opengl-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-pr-helper-7.0.0-13.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'},
    {'reference':'qemu-pr-helper-7.0.0-13.el9', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'17'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = 'Alma-' + package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) 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-guest-agent / qemu-img / qemu-kvm / qemu-kvm-audio-pa / etc');
}
VendorProductVersionCPE
almalinuxqemu-guest-agentp-cpe:/a:alma:linux:qemu-guest-agent
almalinuxqemu-imgp-cpe:/a:alma:linux:qemu-img
almalinuxqemu-kvmp-cpe:/a:alma:linux:qemu-kvm
almalinuxqemu-kvm-audio-pap-cpe:/a:alma:linux:qemu-kvm-audio-pa
almalinuxqemu-kvm-block-curlp-cpe:/a:alma:linux:qemu-kvm-block-curl
almalinuxqemu-kvm-block-rbdp-cpe:/a:alma:linux:qemu-kvm-block-rbd
almalinuxqemu-kvm-commonp-cpe:/a:alma:linux:qemu-kvm-common
almalinuxqemu-kvm-corep-cpe:/a:alma:linux:qemu-kvm-core
almalinuxqemu-kvm-device-display-virtio-gpup-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-gpu
almalinuxqemu-kvm-device-display-virtio-gpu-ccwp-cpe:/a:alma:linux:qemu-kvm-device-display-virtio-gpu-ccw
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