AlmaLinux 8 : httpd:2.4 (ALSA-2022:0258)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2022:0258.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(158859);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/06");

  script_cve_id("CVE-2021-44790");
  script_xref(name:"ALSA", value:"2022:0258");
  script_xref(name:"IAVA", value:"2021-A-0604-S");

  script_name(english:"AlmaLinux 8 : httpd:2.4 (ALSA-2022:0258)");

  script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the
ALSA-2022:0258 advisory.

  - A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser
    (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the
    vulnerability though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and
    earlier. (CVE-2021-44790)

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://errata.almalinux.org/8/ALSA-2022-0258.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-44790");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/12/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/01/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/11");

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

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/AlmaLinux/release');
if (isnull(release) || 'AlmaLinux' >!< release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
var os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 8.x', 'AlmaLinux ' + os_ver);

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 ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);

var module_ver = get_kb_item('Host/AlmaLinux/appstream/httpd');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module httpd:2.4');
if ('2.4' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module httpd:' + module_ver);

var appstreams = {
    'httpd:2.4': [
      {'reference':'httpd-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-devel-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-filesystem-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-manual-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_http2-1.15.7-3.module_el8.5.0+2609+b30d9eec', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_md-2.0.8-8.module_el8.5.0+2609+b30d9eec', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_proxy_html-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_session-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ssl-2.4.37-43.module_el8.5.0+2609+b30d9eec.1.alma', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
    ]
};

var flag = 0;
var appstreams_found = 0;
foreach module (keys(appstreams)) {
  var appstream = NULL;
  var appstream_name = NULL;
  var appstream_version = NULL;
  var appstream_split = split(module, sep:':', keep:FALSE);
  if (!empty_or_null(appstream_split)) {
    appstream_name = appstream_split[0];
    appstream_version = appstream_split[1];
    if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/AlmaLinux/appstream/' + appstream_name);
  }
  if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
    appstreams_found++;
    foreach package_array ( appstreams[module] ) {
      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 = 'Alma-' + 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 (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module httpd:2.4');

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-devel / httpd-filesystem / httpd-manual / httpd-tools / etc');
}