Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 : GNU C Library vulnerabilities (USN-6541-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6541-1. 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(186676);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/07");

  script_cve_id("CVE-2023-4806", "CVE-2023-4813", "CVE-2023-5156");
  script_xref(name:"USN", value:"6541-1");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 : GNU C Library vulnerabilities (USN-6541-1)");

  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 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by
multiple vulnerabilities as referenced in the USN-6541-1 advisory.

  - A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that
    has been freed, resulting in an application crash. This issue is only exploitable when a NSS module
    implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the
    _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the
    call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and
    AI_V4MAPPED as flags. (CVE-2023-4806)

  - A flaw was found in glibc. In an uncommon situation, the gaih_inet function may use memory that has been
    freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is
    called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.
    (CVE-2023-4813)

  - A flaw was found in the GNU C Library. A recent fix for CVE-2023-4806 introduced the potential for a
    memory leak, which may result in an application crash. (CVE-2023-5156)

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-6541-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-5156");

  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:"2023/09/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/12/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/12/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  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: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-armel");
  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-armel");
  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-lse");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-pic");
  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:multiarch-support");
  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 Canonical, Inc. / NASL script (C) 2023 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '23.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 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': '16.04', 'pkgname': 'glibc-source', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc-bin', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-armel', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-dev', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-armel', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-i386', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-pic', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-s390', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'libc6-x32', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'locales', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'locales-all', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'multiarch-support', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '16.04', 'pkgname': 'nscd', 'pkgver': '2.23-0ubuntu11.3+esm5'},
    {'osver': '18.04', 'pkgname': 'glibc-source', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc-bin', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-armel', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-dev', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-armel', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-i386', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-lse', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-pic', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-s390', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'libc6-x32', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'locales', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'locales-all', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'multiarch-support', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '18.04', 'pkgname': 'nscd', 'pkgver': '2.27-3ubuntu1.6+esm1'},
    {'osver': '20.04', 'pkgname': 'glibc-source', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc-bin', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-armel', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-dev', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-armel', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-i386', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-lse', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-pic', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-prof', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-s390', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'libc6-x32', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'locales', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'locales-all', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '20.04', 'pkgname': 'nscd', 'pkgver': '2.31-0ubuntu9.14'},
    {'osver': '22.04', 'pkgname': 'glibc-source', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc-bin', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc-devtools', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-dev', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-i386', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-prof', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-s390', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'libc6-x32', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'locales', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'locales-all', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'nscd', 'pkgver': '2.35-0ubuntu3.5'},
    {'osver': '23.04', 'pkgname': 'glibc-source', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc-bin', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc-devtools', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-dev', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-i386', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-prof', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-s390', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'libc6-x32', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'locales', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'locales-all', 'pkgver': '2.37-0ubuntu2.2'},
    {'osver': '23.04', 'pkgname': 'nscd', 'pkgver': '2.37-0ubuntu2.2'}
];

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_HOLE,
    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');
}