Amazon Linux 2023 : ruby3.2, ruby3.2-bundled-gems, ruby3.2-default-gems (ALAS2023-2025-1168)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2023 Security Advisory ALAS2023-2025-1168.
##

include('compat.inc');

if (description)
{
  script_id(261745);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/08");

  script_cve_id("CVE-2025-43857");

  script_name(english:"Amazon Linux 2023 : ruby3.2, ruby3.2-bundled-gems, ruby3.2-default-gems (ALAS2023-2025-1168)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2023 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2025-1168 advisory.

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to
    versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5, there is a possibility for denial of service by memory
    exhaustion when net-imap reads server responses. At any time while the client is connected, a malicious
    server can send can send a literal byte count, which is automatically read by the client's receiver
    thread. The response reader immediately allocates memory for the number of bytes indicated by the server
    response. This should not be an issue when securely connecting to trusted IMAP servers that are well-
    behaved. It can affect insecure connections and buggy, untrusted, or compromised servers (for example,
    connecting to a user supplied hostname). This issue has been patched in versions 0.5.7, 0.4.20, 0.3.9, and
    0.2.5. (CVE-2025-43857)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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//AL2023/ALAS2023-2025-1168.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2025-43857.html");
  script_set_attribute(attribute:"solution", value:
"Run 'dnf update ruby3.2 --releasever 2023.8.20250908' or
  or 'dnf update --advisory ALAS2023-2025-1168 --releasever 2023.8.20250908' to update your system.");
  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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-43857");

  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:"2025/04/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/09/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-bundled-gems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-bundled-gems-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-default-gems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-libs-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-bigdecimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-bigdecimal-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-bundler");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-io-console");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-io-console-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-irb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-json");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-json-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-minitest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-power_assert");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-psych");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-psych-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-rake");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-rbs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-rbs-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-rdoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-rexml");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-rss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-test-unit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygem-typeprof");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby3.2-rubygems-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2023");
  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) 2025 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 != "-2023")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2023", "Amazon Linux " + os_ver);
}

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

var pkgs = [
    {'reference':'ruby3.2-3.2.8-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-3.2.8-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-bundled-gems-3.2.8-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-bundled-gems-3.2.8-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-bundled-gems-debuginfo-3.2.8-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-bundled-gems-debuginfo-3.2.8-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-debuginfo-3.2.8-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-debuginfo-3.2.8-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-debugsource-3.2.8-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-debugsource-3.2.8-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-default-gems-3.2.8-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-devel-3.2.8-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-devel-3.2.8-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-doc-3.2.8-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-libs-3.2.8-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-libs-3.2.8-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-libs-debuginfo-3.2.8-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-libs-debuginfo-3.2.8-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-bigdecimal-3.1.3-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-bigdecimal-3.1.3-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-bigdecimal-debuginfo-3.1.3-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-bigdecimal-debuginfo-3.1.3-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-bundler-2.4.19-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-io-console-0.6.0-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-io-console-0.6.0-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-io-console-debuginfo-0.6.0-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-io-console-debuginfo-0.6.0-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-irb-1.6.2-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-json-2.6.3-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-json-2.6.3-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-json-debuginfo-2.6.3-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-json-debuginfo-2.6.3-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-minitest-5.25.1-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-power_assert-2.0.3-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-psych-5.0.1-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-psych-5.0.1-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-psych-debuginfo-5.0.1-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-psych-debuginfo-5.0.1-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-rake-13.0.6-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-rbs-2.8.2-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-rbs-2.8.2-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-rbs-debuginfo-2.8.2-184.amzn2023.0.5', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-rbs-debuginfo-2.8.2-184.amzn2023.0.5', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-rdoc-6.5.1.1-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-rexml-3.3.9-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-rss-0.3.1-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-test-unit-3.5.7-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygem-typeprof-0.21.3-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygems-3.4.19-184.amzn2023.0.5', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ruby3.2-rubygems-devel-3.4.19-184.amzn2023.0.5', 'release':'AL-2023', '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;
  var cves = 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 (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  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, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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, "ruby3.2 / ruby3.2-bundled-gems / ruby3.2-bundled-gems-debuginfo / etc");
}