RHEL 8 : bind (RHSA-2020:1845)

2020-04-28T00:00:00
ID REDHAT-RHSA-2020-1845.NASL
Type nessus
Reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-04-28T00:00:00

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:1845 advisory.

  • bind: TCP Pipelining doesn't limit TCP clients on a single connection (CVE-2019-6477)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2020:1845. The text
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136043);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/28");

  script_cve_id("CVE-2019-6477");
  script_xref(name:"RHSA", value:"2020:1845");

  script_name(english:"RHEL 8 : bind (RHSA-2020:1845)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2020:1845 advisory.

  - bind: TCP Pipelining doesn't limit TCP clients on a
    single connection (CVE-2019-6477)

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://cwe.mitre.org/data/definitions/400.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2020:1845");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-6477");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1773617");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"Medium");
  script_cwe_id(400);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/11/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:redhat:enterprise_linux:8::appstream");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8::baseos");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-chroot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-export-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-export-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-libs-lite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-license");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-lite-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-pkcs11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-pkcs11-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-pkcs11-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-pkcs11-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-sdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-sdb-chroot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bind-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python3-bind");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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);

pkgs = [
    {'reference':'bind-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-chroot-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-chroot-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-chroot-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-debugsource-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-debugsource-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-debugsource-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-debugsource-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-devel-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-devel-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-devel-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-devel-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-libs-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-libs-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-libs-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-libs-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-license-9.11.13-3.el8', 'release':'8', 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-sdb-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-sdb-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-sdb-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-utils-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'epoch':'32'},
    {'reference':'bind-utils-9.11.13-3.el8', 'cpu':'s390x', 'release':'8', 'epoch':'32'},
    {'reference':'bind-utils-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'epoch':'32'},
    {'reference':'python3-bind-9.11.13-3.el8', 'release':'8', 'epoch':'32'}
];

flag = 0;
foreach package_array ( pkgs ) {
  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_spec_vers_cmp) {
      if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:TRUE)) flag++;
    }
    else
    {
      if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch)) flag++;
    }
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'bind / bind-chroot / bind-debugsource / etc');
}