Amazon Linux 2 : util-linux (ALAS-2022-1901)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2022-1901.
##

include('compat.inc');

if (description)
{
  script_id(168441);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/07");

  script_cve_id("CVE-2022-0563");

  script_name(english:"Amazon Linux 2 : util-linux (ALAS-2022-1901)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of util-linux installed on the remote host is prior to 2.30.2-2. It is, therefore, affected by a
vulnerability as referenced in the ALAS2-2022-1901 advisory.

  - A flaw was found in the util-linux chfn and chsh utilities when compiled with Readline support. The
    Readline library uses an INPUTRC environment variable to get a path to the library config file. When the
    library cannot parse the specified file, it prints an error message containing data from the file. This
    flaw allows an unprivileged user to read root-owned files, potentially leading to privilege escalation.
    This flaw affects util-linux versions prior to 2.37.4. (CVE-2022-0563)

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://alas.aws.amazon.com/AL2/ALAS-2022-1901.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2022-0563.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update util-linux' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-0563");

  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:"2022/02/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/12/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/12/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libblkid");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libblkid-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libfdisk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libfdisk-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libmount");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libmount-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsmartcols");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsmartcols-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libuuid");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libuuid-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python-libmount");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:util-linux");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:util-linux-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:util-linux-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:uuidd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'libblkid-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libblkid-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libblkid-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libblkid-devel-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libblkid-devel-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libblkid-devel-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libfdisk-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libfdisk-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libfdisk-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libfdisk-devel-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libfdisk-devel-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libfdisk-devel-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libmount-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libmount-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libmount-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libmount-devel-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libmount-devel-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libmount-devel-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libsmartcols-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libsmartcols-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libsmartcols-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libsmartcols-devel-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libsmartcols-devel-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libsmartcols-devel-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libuuid-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libuuid-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libuuid-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libuuid-devel-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libuuid-devel-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libuuid-devel-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python-libmount-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python-libmount-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python-libmount-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-debuginfo-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-debuginfo-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-debuginfo-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-user-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-user-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'util-linux-user-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'uuidd-2.30.2-2.amzn2.0.10', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'uuidd-2.30.2-2.amzn2.0.10', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'uuidd-2.30.2-2.amzn2.0.10', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_NOTE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libblkid / libblkid-devel / libfdisk / etc");
}