Ubuntu 22.04 LTS / 23.04 : GNU C Library vulnerabilities (USN-6409-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6409-1. 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(182468);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/29");

  script_cve_id("CVE-2023-4527", "CVE-2023-4911");
  script_xref(name:"USN", value:"6409-1");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2023/12/12");

  script_name(english:"Ubuntu 22.04 LTS / 23.04 : GNU C Library vulnerabilities (USN-6409-1)");

  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 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-6409-1 advisory.

  - A flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and
    the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048
    bytes can potentially disclose stack contents through the function returned address data, and may cause a
    crash. (CVE-2023-4527)

  - A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the
    GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted
    GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with
    elevated privileges. (CVE-2023-4911)

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-6409-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-4911");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Glibc Tunables Privilege Escalation CVE-2023-4911 (aka Looney Tunables)');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/09/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/10/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:23.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:glibc-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc-dev-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc-devtools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-i386");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-s390");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-x32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-i386");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-prof");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-s390");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-x32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:locales");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:locales-all");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nscd");
  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) 2023-2024 Canonical, Inc. / NASL script (C) 2023-2024 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 (! ('22.04' >< os_release || '23.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 23.04', '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': '22.04', 'pkgname': 'glibc-source', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc-bin', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc-devtools', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-dev', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-i386', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-prof', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-s390', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'libc6-x32', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'locales', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'locales-all', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '22.04', 'pkgname': 'nscd', 'pkgver': '2.35-0ubuntu3.4'},
    {'osver': '23.04', 'pkgname': 'glibc-source', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc-bin', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc-devtools', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-dev', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-i386', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-prof', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-s390', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'libc6-x32', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'locales', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'locales-all', 'pkgver': '2.37-0ubuntu2.1'},
    {'osver': '23.04', 'pkgname': 'nscd', 'pkgver': '2.37-0ubuntu2.1'}
];

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_WARNING,
    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, 'glibc-source / libc-bin / libc-dev-bin / libc-devtools / libc6 / etc');
}