AlmaLinux 9.2 [TuxCare] Security Update: ruby / ruby-default-gems / ruby-devel / ruby-doc / ruby-libs / etc Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1769511237)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(360181);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/01");

  script_cve_id("CVE-2025-27221", "CVE-2025-61594");
  script_xref(name:"CLSA", value:"2026:1769511237");

  script_name(english:"AlmaLinux 9.2 [TuxCare] Security Update: ruby / ruby-default-gems / ruby-devel / ruby-doc / ruby-libs / etc Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1769511237)");

  script_set_attribute(attribute:"synopsis", value:
"The AlmaLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare
ALMALINUX9.2:CLSA-2026:1769511237 advisory.

  - In the URI gem before 1.0.3 for Ruby, the URI handling methods (URI.join, URI#merge, URI#+) have an
    inadvertent leakage of authentication credentials because userinfo is retained even after changing the
    host. (CVE-2025-27221)

  - URI is a module providing classes to handle Uniform Resource Identifiers. In versions 0.12.4 and earlier
    (bundled in Ruby 3.2 series) 0.13.2 and earlier (bundled in Ruby 3.3 series), 1.0.3 and earlier (bundled
    in Ruby 3.4 series), when using the + operator to combine URIs, sensitive information like passwords from
    the original URI can be leaked, violating RFC3986 and making applications vulnerable to credential
    exposure. This is a a bypass for the fix to CVE-2025-27221 that can expose user credentials. This issue
    has been fixed in versions 0.12.5, 0.13.3 and 1.0.4. (CVE-2025-61594)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://security.tuxcare.com/csaf/v2/els_os/almalinux9.2esu/advisories/2026/clsa-2026_1769511237.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0f3dcbb2");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2026:1769511237");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory ALMALINUX9.2:CLSA-2026:1769511237.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/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:N/AC:L/PR:N/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:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/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-2025-61594");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/03/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/OS/extended-third-party", "Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");

  exit(0);
}
include('rpm2.inc');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (empty_or_null(third_party_support) || third_party_support != 'TuxCare') exit(0, 'TuxCare support not enabled.');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'AlmaLinux' >!< os_product) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
if (! preg(pattern:"^9.2([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'AlmaLinux 9.2', 'AlmaLinux ' + os_version);

if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);


var constraints = [
  {
    'release': '9',
    'sp': '2',
    'pkgs': [
      {'reference':'ruby-3.0.4-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'i686', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-3.0.4-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'x86_64', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-default-gems-3.0.4-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-devel-3.0.4-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'i686', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-devel-3.0.4-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'x86_64', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-doc-3.0.4-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-3.0.4-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'i686', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-3.0.4-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'x86_64', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-3.0.0-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'i686', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-3.0.0-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'x86_64', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bundler-2.2.33-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-0.5.7-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'i686', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-0.5.7-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'x86_64', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-irb-1.3.5-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-2.5.1-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'i686', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-2.5.1-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'x86_64', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-minitest-5.14.2-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-power_assert-1.2.0-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-3.3.2-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'i686', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-3.3.2-160.el9_0.tuxcare.els11', 'sp':'2', 'cpu':'x86_64', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rake-13.0.3-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rbs-1.4.0-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rdoc-6.3.3-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rexml-3.3.3-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rss-0.2.9-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-test-unit-3.3.7-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-typeprof-0.15.2-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygems-3.2.33-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygems-devel-3.2.33-160.el9_0.tuxcare.els11', 'sp':'2', 'el_string':'el9_0', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(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, 'ruby / ruby-default-gems / ruby-devel / ruby-doc / ruby-libs / etc');
}