Amazon Linux 2 : ruby (ALASRUBY3.0-2023-001)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALASRUBY3.0-2023-001.
##

include('compat.inc');

if (description)
{
  script_id(181969);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/27");

  script_cve_id("CVE-2023-28755", "CVE-2023-28756");

  script_name(english:"Amazon Linux 2 : ruby (ALASRUBY3.0-2023-001)");

  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 ruby installed on the remote host is prior to 3.0.6-156. It is, therefore, affected by multiple
vulnerabilities as referenced in the ALAS2RUBY3.0-2023-001 advisory.

  - A ReDoS issue was discovered in the URI component through 0.12.0 in Ruby through 3.2.1. The URI parser
    mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing
    strings to URI objects. The fixed versions are 0.12.1, 0.11.1, 0.10.2 and 0.10.0.1. (CVE-2023-28755)

  - A ReDoS issue was discovered in the Time component through 0.2.1 in Ruby through 3.2.1. The Time parser
    mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing
    strings to Time objects. The fixed versions are 0.1.1 and 0.2.2. (CVE-2023-28756)

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://alas.aws.amazon.com/AL2/ALASRUBY3.0-2023-001.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-28755.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-28756.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update ruby' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-28756");

  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:"2023/03/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/08/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby-default-gems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-bigdecimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-bundler");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-io-console");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-irb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-json");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-minitest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-power_assert");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-psych");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-rake");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-rbs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-rdoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-rexml");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-rss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-test-unit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem-typeprof");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygems-devel");
  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) 2023 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':'ruby-3.0.6-156.amzn2.0.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-3.0.6-156.amzn2.0.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-debuginfo-3.0.6-156.amzn2.0.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-debuginfo-3.0.6-156.amzn2.0.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-default-gems-3.0.6-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-devel-3.0.6-156.amzn2.0.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-devel-3.0.6-156.amzn2.0.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-doc-3.0.6-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-libs-3.0.6-156.amzn2.0.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'ruby-libs-3.0.6-156.amzn2.0.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-bigdecimal-3.0.0-156.amzn2.0.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-bigdecimal-3.0.0-156.amzn2.0.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-bundler-2.2.33-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-io-console-0.5.7-156.amzn2.0.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-io-console-0.5.7-156.amzn2.0.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-irb-1.3.5-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-json-2.5.1-156.amzn2.0.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-json-2.5.1-156.amzn2.0.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-minitest-5.14.2-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-power_assert-1.2.0-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-psych-3.3.2-156.amzn2.0.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-psych-3.3.2-156.amzn2.0.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-rake-13.0.3-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-rbs-1.4.0-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-rdoc-6.3.3-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-rexml-3.2.5-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-rss-0.2.9-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-test-unit-3.3.7-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygem-typeprof-0.15.2-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygems-3.2.33-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'},
    {'reference':'rubygems-devel-3.2.33-156.amzn2.0.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ruby3.0'}
];

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_WARNING,
      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, "ruby / ruby-debuginfo / ruby-default-gems / etc");
}