Ubuntu 18.04 LTS / 20.04 LTS : GNU C Library vulnerabilities (USN-5310-1)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5310-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

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

if (description)
{
  script_id(158502);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/29");

  script_cve_id(
    "CVE-2016-10228",
    "CVE-2019-25013",
    "CVE-2020-6096",
    "CVE-2020-27618",
    "CVE-2020-29562",
    "CVE-2021-3326",
    "CVE-2021-3998",
    "CVE-2021-3999",
    "CVE-2021-27645",
    "CVE-2021-35942",
    "CVE-2022-23218",
    "CVE-2022-23219"
  );
  script_xref(name:"USN", value:"5310-1");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS : GNU C Library vulnerabilities (USN-5310-1)");

  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 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-5310-1 advisory.

    Jan Engelhardt, Tavis Ormandy, and others discovered that the GNU C Library iconv feature incorrectly
    handled certain input sequences. An attacker could possibly use this issue to cause the GNU C Library to
    hang or crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu
    20.04 LTS. (CVE-2016-10228, CVE-2019-25013, CVE-2020-27618, CVE-2020-29562, CVE-2021-3326)

    Jason Royes and Samuel Dytrych discovered that the GNU C Library incorrectly handled signed comparisons on
    ARMv7 targets. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a
    denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and
    Ubuntu 20.04 LTS. (CVE-2020-6096)

    It was discovered that the GNU C Library nscd daemon incorrectly handled certain netgroup lookups. An
    attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of
    service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-27645)

    It was discovered that the GNU C Library wordexp function incorrectly handled certain patterns. An
    attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or
    possibly obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
    (CVE-2021-35942)

    It was discovered that the GNU C Library realpath function incorrectly handled return values. An attacker
    could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 21.10.
    (CVE-2021-3998)

    It was discovered that the GNU C library getcwd function incorrectly handled buffers. An attacker could
    use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute
    arbitrary code. (CVE-2021-3999)

    It was discovered that the GNU C Library sunrpc module incorrectly handled buffer lengths. An attacker
    could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service.
    (CVE-2022-23218, CVE-2022-23219)

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-5310-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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-2022-23219");

  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:"2017/03/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/03/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  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: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");
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  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2022-2024 Canonical, Inc. / NASL script (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
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  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 (! ('18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04', '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': '18.04', 'pkgname': 'glibc-source', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc-bin', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-armel', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-dev', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-armel', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-i386', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-lse', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-pic', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-s390', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'libc6-x32', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'locales', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'locales-all', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'multiarch-support', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '18.04', 'pkgname': 'nscd', 'pkgver': '2.27-3ubuntu1.5'},
    {'osver': '20.04', 'pkgname': 'glibc-source', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc-bin', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-armel', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-dev', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-armel', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-i386', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-lse', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-pic', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-prof', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-s390', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'libc6-x32', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'locales', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'locales-all', 'pkgver': '2.31-0ubuntu9.7'},
    {'osver': '20.04', 'pkgname': 'nscd', 'pkgver': '2.31-0ubuntu9.7'}
];

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, 'glibc-source / libc-bin / libc-dev-bin / libc6 / libc6-amd64 / etc');
}