RHEL 8 : httpd:2.4 (RHSA-2019:0980)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2019:0980. The text
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(124667);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/24");

  script_cve_id("CVE-2019-0211", "CVE-2019-0215");
  script_xref(name:"RHSA", value:"2019:0980");

  script_name(english:"RHEL 8 : httpd:2.4 (RHSA-2019:0980)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description",
    value:
"An update for the httpd:2.4 module is now available for Red Hat
Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The httpd packages provide the Apache HTTP Server, a powerful,
efficient, and extensible web server.

Security Fix(es) :

* httpd: privilege escalation from modules scripts (CVE-2019-0211)

* httpd: mod_ssl: access control bypass when using per-location client
certification authentication (CVE-2019-0215)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2019:0980"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2019-0211"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2019-0215"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0211");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-manual");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpd-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_http2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_http2-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_md");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_proxy_html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_session");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_ssl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/07");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/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);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 8.x", "Red Hat " + os_ver);

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

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, 'Red Hat', cpu);

module_ver = get_kb_item('Host/RedHat/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);

appstreams = {
    'httpd:2.4': [
      {'reference':'httpd-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'httpd-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'httpd-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'httpd-debugsource-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'httpd-debugsource-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'httpd-debugsource-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'httpd-devel-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'httpd-devel-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'httpd-devel-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'httpd-filesystem-2.4.37-11.module+el8.0.0+2969+90015743', 'release':'8'},
      {'reference':'httpd-manual-2.4.37-11.module+el8.0.0+2969+90015743', 'release':'8'},
      {'reference':'httpd-tools-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'httpd-tools-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'httpd-tools-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'mod_http2-1.11.3-2.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'mod_http2-1.11.3-2.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'mod_http2-1.11.3-2.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'mod_http2-debugsource-1.11.3-2.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'mod_http2-debugsource-1.11.3-2.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'mod_http2-debugsource-1.11.3-2.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'mod_ldap-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'mod_ldap-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'mod_ldap-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'mod_md-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'mod_md-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'mod_md-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'mod_proxy_html-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8', 'epoch':'1'},
      {'reference':'mod_proxy_html-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8', 'epoch':'1'},
      {'reference':'mod_proxy_html-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8', 'epoch':'1'},
      {'reference':'mod_session-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8'},
      {'reference':'mod_session-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8'},
      {'reference':'mod_session-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8'},
      {'reference':'mod_ssl-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'aarch64', 'release':'8', 'epoch':'1'},
      {'reference':'mod_ssl-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'s390x', 'release':'8', 'epoch':'1'},
      {'reference':'mod_ssl-2.4.37-11.module+el8.0.0+2969+90015743', 'cpu':'x86_64', 'release':'8', 'epoch':'1'}
    ],
};

flag = 0;
appstreams_found = 0;
foreach module (keys(appstreams)) {
  appstream = NULL;
  appstream_name = NULL;
  appstream_version = NULL;
  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/RedHat/appstream/' + appstream_name);
  }
  if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
    appstreams_found++;
    foreach package_array ( appstreams[module] ) {
      reference = NULL;
      release = NULL;
      sp = NULL;
      cpu = NULL;
      el_string = NULL;
      rpm_spec_vers_cmp = NULL;
      epoch = NULL;
      if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
      if (!empty_or_null(package_array['release'])) release = 'RHEL' + 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 (reference && release) {
        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)) 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
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'httpd / httpd-debugsource / httpd-devel / etc');
}