RHEL 6 : bind (RHSA-2018:2571)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:2571. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(112134);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/28");

  script_cve_id("CVE-2018-5740");
  script_xref(name:"RHSA", value:"2018:2571");

  script_name(english:"RHEL 6 : bind (RHSA-2018:2571)");
  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 bind is now available for Red Hat Enterprise Linux 6.

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 Berkeley Internet Name Domain (BIND) is an implementation of the
Domain Name System (DNS) protocols. BIND includes a DNS server
(named); a resolver library (routines for applications to use when
interfacing with DNS); and tools for verifying that the DNS server is
operating correctly.

Security Fix(es) :

* bind: processing of certain records when 'deny-answer-aliases' is in
use may trigger an assert leading to a denial of service
(CVE-2018-5740)

For more details about the security issue(s), including the impact, a
CVSS score, and other related information, refer to the CVE page(s)
listed in the References section.

Red Hat would like to thank ISC for reporting this issue. Upstream
acknowledges Tony Finch (University of Cambridge) as the original
reporter."
  );
  # https://kb.isc.org/article/AA-01639
  script_set_attribute(
    attribute:"see_also",
    value:"https://kb.isc.org/docs/aa-01639"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2018:2571"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-5740"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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-debuginfo");
  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-libs");
  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-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/28");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2022 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:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2018:2571";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"bind-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"bind-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"bind-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"bind-chroot-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"bind-chroot-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"bind-chroot-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", reference:"bind-debuginfo-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", reference:"bind-devel-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", reference:"bind-libs-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"bind-sdb-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"bind-sdb-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"bind-sdb-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"bind-utils-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"bind-utils-9.8.2-0.68.rc1.el6_10.1")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"bind-utils-9.8.2-0.68.rc1.el6_10.1")) 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-debuginfo / bind-devel / bind-libs / etc");
  }
}