Ubuntu 20.04 LTS / 22.04 LTS : QEMU regression (USN-6567-2)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6567-2. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(200171);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/06");
  script_xref(name:"USN", value:"6567-2");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS : QEMU regression (USN-6567-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS host has packages installed that are affected by a vulnerability as referenced
in the USN-6567-2 advisory.

    USN-6567-1 fixed vulnerabilities QEMU. The fix for CVE-2023-2861 was too restrictive and introduced a
    behaviour change leading to a regression in certain environments. This update fixes the problem.

    Original advisory details:

    Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the

    USB xHCI controller device. A privileged guest attacker could possibly use

    this issue to cause QEMU to crash, leading to a denial of service. This

    issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)

    It was discovered that QEMU incorrectly handled the TCG Accelerator. A

    local attacker could use this issue to cause QEMU to crash, leading to a

    denial of service, or possibly execute arbitrary code and esclate

    privileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-24165)

    It was discovered that QEMU incorrectly handled the Intel HD audio device.

    A malicious guest attacker could use this issue to cause QEMU to crash,

    leading to a denial of service. This issue only affected Ubuntu 22.04 LTS.

    (CVE-2021-3611)

    It was discovered that QEMU incorrectly handled the ATI VGA device. A

    malicious guest attacker could use this issue to cause QEMU to crash,

    leading to a denial of service. This issue only affected Ubuntu 20.04 LTS.

    (CVE-2021-3638)

    It was discovered that QEMU incorrectly handled the VMWare paravirtual RDMA

    device. A malicious guest attacker could use this issue to cause QEMU to

    crash, leading to a denial of service. (CVE-2023-1544)

    It was discovered that QEMU incorrectly handled the 9p passthrough

    filesystem. A malicious guest attacker could possibly use this issue to

    open special files and escape the exported 9p tree. This issue only

    affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04.

    (CVE-2023-2861)

    It was discovered that QEMU incorrectly handled the virtual crypto device.

    A malicious guest attacker could use this issue to cause QEMU to crash,

    leading to a denial of service, or possibly execute arbitrary code. This

    issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04.

    (CVE-2023-3180)

    It was discovered that QEMU incorrectly handled the built-in VNC server.

    A remote authenticated attacker could possibly use this issue to cause QEMU

    to stop responding, resulting in a denial of service. This issue only

    affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-3255)

    It was discovered that QEMU incorrectly handled net device hot-unplugging.

    A malicious guest attacker could use this issue to cause QEMU to crash,

    leading to a denial of service. This issue only affected Ubuntu 22.04 LTS

    and Ubuntu 23.04. (CVE-2023-3301)

    It was discovered that QEMU incorrectly handled the built-in VNC server.

    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, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-3354)

    It was discovered that QEMU incorrectly handled NVME devices. A malicious

    guest attacker could use this issue to cause QEMU to crash, leading to a

    denial of service. This issue only affected Ubuntu 23.10. (CVE-2023-40360)

    It was discovered that QEMU incorrectly handled NVME devices. A malicious

    guest attacker could use this issue to cause QEMU to crash, leading to a

    denial of service, or possibly obtain sensitive information. This issue

    only affected Ubuntu 23.10. (CVE-2023-4135)

    It was discovered that QEMU incorrectly handled SCSI devices. A malicious

    guest attacker could use this issue to cause QEMU to crash, leading to a

    denial of service. This issue only affected Ubuntu 23.04 and Ubuntu 23.10.

    (CVE-2023-42467)

    It was discovered that QEMU incorrectly handled certain disk offsets. A

    malicious guest attacker could possibly use this issue to gain control of

    the host in certain nested virtualization scenarios. (CVE-2023-5088)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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://ubuntu.com/security/notices/USN-6567-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"None");

  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:"2024/06/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/06/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/06/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  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-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:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2024 Canonical, Inc. / NASL script (C) 2024 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 (! ('20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04', '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': '20.04', 'pkgname': 'qemu', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-block-extra', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-kvm', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-arm', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-common', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-data', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-gui', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-mips', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-misc', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-s390x', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-x86', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-x86-microvm', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-system-x86-xen', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-user', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-user-binfmt', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-user-static', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '20.04', 'pkgname': 'qemu-utils', 'pkgver': '1:4.2-3ubuntu6.29'},
    {'osver': '22.04', 'pkgname': 'qemu', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-block-extra', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-arm', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-common', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-data', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-gui', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-mips', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-misc', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-s390x', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-x86', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-x86-microvm', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-system-x86-xen', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-user', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-user-binfmt', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-user-static', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'},
    {'osver': '22.04', 'pkgname': 'qemu-utils', 'pkgver': '1:6.2+dfsg-2ubuntu6.21'}
];

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_NOTE,
    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');
}