Amazon Linux 2 : ipa, --advisory ALAS2-2025-3026 (ALAS-2025-3026)

#%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-2025-3026.
##

include('compat.inc');

if (description)
{
  script_id(269247);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/07");

  script_cve_id("CVE-2025-7493");

  script_name(english:"Amazon Linux 2 : ipa, --advisory ALAS2-2025-3026 (ALAS-2025-3026)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-3026 advisory.

    A privilege escalation flaw from host to domain administrator was found in FreeIPA. This vulnerability is
    similar to CVE-2025-4404, where it fails to validate the uniqueness of the krbCanonicalName. While the
    previously released version added validations for the admin@REALM credential, FreeIPA still does not
    validate the root@REALM canonical name, which can also be used as the realm administrator's name. This
    flaw allows an attacker to perform administrative tasks over the REALM, leading to access to sensitive
    data and sensitive data exfiltration. (CVE-2025-7493)

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//AL2/ALAS2-2025-3026.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-2025-7493.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update ipa' or
  or 'yum update --advisory ALAS2-2025-3026' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:M/C:C/I:C/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:H/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-7493");

  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:"2025/09/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-client-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-python-compat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-server-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-server-dns");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-server-trust-ad");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python2-ipaclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python2-ipalib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python2-ipaserver");
  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) 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 != "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':'ipa-client-4.6.8-5.amzn2.17.3', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-client-4.6.8-5.amzn2.17.3', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-client-4.6.8-5.amzn2.17.3', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-client-common-4.6.8-5.amzn2.17.3', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-common-4.6.8-5.amzn2.17.3', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-debuginfo-4.6.8-5.amzn2.17.3', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-debuginfo-4.6.8-5.amzn2.17.3', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-debuginfo-4.6.8-5.amzn2.17.3', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-python-compat-4.6.8-5.amzn2.17.3', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-4.6.8-5.amzn2.17.3', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-4.6.8-5.amzn2.17.3', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-4.6.8-5.amzn2.17.3', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-common-4.6.8-5.amzn2.17.3', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-dns-4.6.8-5.amzn2.17.3', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-trust-ad-4.6.8-5.amzn2.17.3', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-trust-ad-4.6.8-5.amzn2.17.3', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-trust-ad-4.6.8-5.amzn2.17.3', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python2-ipaclient-4.6.8-5.amzn2.17.3', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python2-ipalib-4.6.8-5.amzn2.17.3', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python2-ipaserver-4.6.8-5.amzn2.17.3', '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;
  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, "ipa-client / ipa-client-common / ipa-common / etc");
}