Debian dla-3759 : qemu - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3759. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(191790);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/15");

  script_cve_id("CVE-2023-2861", "CVE-2023-3354", "CVE-2023-5088");
  script_xref(name:"IAVB", value:"2023-B-0058-S");
  script_xref(name:"IAVB", value:"2023-B-0073-S");
  script_xref(name:"IAVB", value:"2024-B-0022");

  script_name(english:"Debian dla-3759 : qemu - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-3759 advisory.

  - A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not
    prohibit opening special files on the host side, potentially allowing a malicious client to escape from
    the exported 9p tree by creating and opening a device file in the shared folder. (CVE-2023-2861)

  - A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks
    whether the current number of connections crosses a certain threshold and if so, cleans up the previous
    connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the
    connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated
    client to cause a denial of service. (CVE-2023-3354)

  - A bug in QEMU could cause a guest I/O operation otherwise addressed to an arbitrary disk offset to be
    targeted to offset 0 instead (potentially overwriting the VM's boot code). This could be used, for
    example, by L2 guests with a virtual disk (vdiskL2) stored on a virtual disk of an L1 (vdiskL1) hypervisor
    to read and/or write data to LBA 0 of vdiskL1, potentially gaining control of L1 at its next reboot.
    (CVE-2023-5088)

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://security-tracker.debian.org/tracker/source-package/qemu");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-2861");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-3354");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-5088");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/qemu");
  script_set_attribute(attribute:"solution", value:
"Upgrade the qemu packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:N");
  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:L/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-2861");

  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:"2023/07/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/03/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-block-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-gui");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-mips");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-misc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-ppc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-sparc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-x86");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-user-binfmt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-user-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/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);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(10)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 10.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'qemu', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-block-extra', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-guest-agent', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-kvm', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-arm', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-common', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-data', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-gui', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-mips', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-misc', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-ppc', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-sparc', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-system-x86', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-user', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-user-binfmt', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-user-static', 'reference': '1:3.1+dfsg-8+deb10u12'},
    {'release': '10.0', 'prefix': 'qemu-utils', 'reference': '1:3.1+dfsg-8+deb10u12'}
];

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

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_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');
}