MiracleLinux 8 : httpd:2.4 (AXSA:2021-2541:01)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Miracle Linux Security Advisory AXSA:2021-2541:01.
##

include('compat.inc');

if (description)
{
  script_id(294771);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/20");

  script_cve_id("CVE-2021-20325", "CVE-2021-26690", "CVE-2021-30641");

  script_name(english:"MiracleLinux 8 : httpd:2.4 (AXSA:2021-2541:01)");

  script_set_attribute(attribute:"synopsis", value:
"The remote MiracleLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
AXSA:2021-2541:01 advisory.

    httpd: mod_session: NULL pointer dereference when parsing Cookie header
    (CVE-2021-26690)
        httpd: Unexpected URL matching with 'MergeSlashes OFF' (CVE-2021-30641)
        httpd: Regression of CVE-2021-40438 and CVE-2021-26691 fixes in MIRACLE
    LINUX 8.4 (CVE-2021-20325)
    CVE(s):
    CVE-2021-26690
    Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can
    cause a NULL pointer dereference and crash, leading to a possible Denial Of Service
    CVE-2021-30641
    Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'
    CVE-2021-20325
    ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when
    announcing a new security problem. When the candidate has been publicized, the details for this candidate
    will be provided.
    Modularity name: httpd
    Stream name: 2.4

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

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://tsn.miraclelinux.com/en/node/13723");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/UI:N/S:U/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-2021-20325");

  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:"High");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/06/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/11/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:httpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:httpd-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:httpd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:httpd-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:httpd-manual");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:httpd-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:mod_http2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:mod_http2-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:mod_ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:mod_md");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:mod_md-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:mod_proxy_html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:mod_session");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:mod_ssl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:miracle:linux:8");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Miracle 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_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/MiracleLinux/release", "Host/MiracleLinux/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');

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) || 'MIRACLE LINUX' >!< os_product) audit(AUDIT_OS_NOT, 'MIRACLE LINUX');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'MIRACLE LINUX');
if (! preg(pattern:"^8([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'MiracleLinux 8.x', 'MIRACLE LINUX ' + os_version);

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

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'ppc' >!< cpu && 's390' >!< cpu && 'x86_64' >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'MIRACLE LINUX', cpu);

var constraints = [
  {
    'release': '8',
    'pkgs': [
      {'reference':'httpd-2.4.37-39.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'httpd-debugsource-2.4.37-39.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'httpd-devel-2.4.37-39.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'httpd-filesystem-2.4.37-39.module+el8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'httpd-manual-2.4.37-39.module+el8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'httpd-tools-2.4.37-39.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'mod_http2-1.15.7-3.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'mod_http2-debugsource-1.15.7-3.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'mod_ldap-2.4.37-39.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'mod_md-2.0.8-8.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'mod_md-debugsource-2.0.8-8.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'mod_proxy_html-2.4.37-39.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'mod_session-2.4.37-39.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'mod_ssl-2.4.37-39.module+el8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'}
    ]
  }
];

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, 'httpd / httpd-debugsource / httpd-devel / httpd-filesystem / etc');
}