Debian DSA-4980-1 : qemu - security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-4980. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(153865);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/29");

  script_cve_id(
    "CVE-2021-3544",
    "CVE-2021-3545",
    "CVE-2021-3546",
    "CVE-2021-3638",
    "CVE-2021-3682",
    "CVE-2021-3713",
    "CVE-2021-3748"
  );

  script_name(english:"Debian DSA-4980-1 : 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 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-4980 advisory.

  - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions
    up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-
    gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)

  - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of
    QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-
    user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit
    this issue to leak memory from the host. (CVE-2021-3545)

  - A flaw was found in vhost-user-gpu of QEMU in versions up to and including 6.0. An out-of-bounds write
    vulnerability can allow a malicious guest to crash the QEMU process on the host resulting in a denial of
    service or potentially execute arbitrary code on the host with the privileges of the QEMU process. The
    highest threat from this vulnerability is to data confidentiality and integrity as well as system
    availability. (CVE-2021-3546)

  - 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)

  - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions
    prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-
    bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this
    flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the
    host. (CVE-2021-3713)

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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988174");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/qemu");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-4980");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3544");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3545");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3546");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3638");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3682");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3713");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3748");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/qemu");
  script_set_attribute(attribute:"solution", value:
"Upgrade the qemu packages.

For the stable distribution (bullseye), these problems have been fixed in version 1");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  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-2021-3748");
  script_set_attribute(attribute:"cvss3_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:"2021/06/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/10/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/04");

  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-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:11.0");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian 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/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('audit.inc');
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 release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 11.0', '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': '11.0', 'prefix': 'qemu', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-block-extra', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-guest-agent', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-arm', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-common', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-data', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-gui', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-mips', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-misc', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-ppc', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-sparc', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-system-x86', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-user', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-user-binfmt', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-user-static', 'reference': '1:5.2+dfsg-11+deb11u1'},
    {'release': '11.0', 'prefix': 'qemu-utils', 'reference': '1:5.2+dfsg-11+deb11u1'}
];

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-system / etc');
}