Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS : BusyBox vulnerabilities (USN-6961-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6961-1. 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(205548);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2022-48174",
    "CVE-2023-42363",
    "CVE-2023-42364",
    "CVE-2023-42365"
  );
  script_xref(name:"USN", value:"6961-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS : BusyBox vulnerabilities (USN-6961-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6961-1 advisory.

    It was discovered that BusyBox did not properly validate user input when performing certain arithmetic
    operations. If a user or automated system were tricked into processing a specially crafted file, an
    attacker could possibly use this issue to cause a denial of service, or execute arbitrary code.
    (CVE-2022-48174)

    It was discovered that BusyBox incorrectly managed memory when evaluating certain awk expressions. An
    attacker could possibly use this issue to cause a denial of service, or execute arbitrary code. This issue
    only affected Ubuntu 24.04 LTS. (CVE-2023-42363, CVE-2023-42364, CVE-2023-42365)

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

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://ubuntu.com/security/notices/USN-6961-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:L/PR:N/UI:N/S:U/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-2022-48174");

  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:"2023/08/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/08/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/08/14");

  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:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox-initramfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox-syslogd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:udhcpc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:udhcpd");
  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 || '24.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 24.04', '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': 'busybox', 'pkgver': '1:1.30.1-4ubuntu6.5'},
    {'osver': '20.04', 'pkgname': 'busybox-initramfs', 'pkgver': '1:1.30.1-4ubuntu6.5'},
    {'osver': '20.04', 'pkgname': 'busybox-static', 'pkgver': '1:1.30.1-4ubuntu6.5'},
    {'osver': '20.04', 'pkgname': 'busybox-syslogd', 'pkgver': '1:1.30.1-4ubuntu6.5'},
    {'osver': '20.04', 'pkgname': 'udhcpc', 'pkgver': '1:1.30.1-4ubuntu6.5'},
    {'osver': '20.04', 'pkgname': 'udhcpd', 'pkgver': '1:1.30.1-4ubuntu6.5'},
    {'osver': '22.04', 'pkgname': 'busybox', 'pkgver': '1:1.30.1-7ubuntu3.1'},
    {'osver': '22.04', 'pkgname': 'busybox-initramfs', 'pkgver': '1:1.30.1-7ubuntu3.1'},
    {'osver': '22.04', 'pkgname': 'busybox-static', 'pkgver': '1:1.30.1-7ubuntu3.1'},
    {'osver': '22.04', 'pkgname': 'busybox-syslogd', 'pkgver': '1:1.30.1-7ubuntu3.1'},
    {'osver': '22.04', 'pkgname': 'udhcpc', 'pkgver': '1:1.30.1-7ubuntu3.1'},
    {'osver': '22.04', 'pkgname': 'udhcpd', 'pkgver': '1:1.30.1-7ubuntu3.1'},
    {'osver': '24.04', 'pkgname': 'busybox', 'pkgver': '1:1.36.1-6ubuntu3.1'},
    {'osver': '24.04', 'pkgname': 'busybox-initramfs', 'pkgver': '1:1.36.1-6ubuntu3.1'},
    {'osver': '24.04', 'pkgname': 'busybox-static', 'pkgver': '1:1.36.1-6ubuntu3.1'},
    {'osver': '24.04', 'pkgname': 'busybox-syslogd', 'pkgver': '1:1.36.1-6ubuntu3.1'},
    {'osver': '24.04', 'pkgname': 'udhcpc', 'pkgver': '1:1.36.1-6ubuntu3.1'},
    {'osver': '24.04', 'pkgname': 'udhcpd', 'pkgver': '1:1.36.1-6ubuntu3.1'}
];

var flag = 0;
foreach var 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)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'busybox / busybox-initramfs / busybox-static / busybox-syslogd / etc');
}