RHEL 7 : bind (RHSA-2020:2893)

2020-07-13T00:00:00
ID REDHAT-RHSA-2020-2893.NASL
Type nessus
Reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-07-13T00:00:00

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:2893 advisory.

  • bind: A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c (CVE-2020-8617)

Note that Nessus has not tested for this issue but has instead relied only on the application

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2020:2893. The text
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(138383);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14");

  script_cve_id("CVE-2020-8617");
  script_xref(name:"RHSA", value:"2020:2893");

  script_name(english:"RHEL 7 : bind (RHSA-2020:2893)");
  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 7 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2020:2893 advisory.

  - bind: A logic error in code which checks TSIG validity
    can be used to trigger an assertion failure in tsig.c
    (CVE-2020-8617)

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/617.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-8617");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2020:2893");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1836124");
  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_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:N/I:N/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-2020-8617");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(617);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:7.7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:7.7::computenode");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:7.7::server");
  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-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_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:"^7\.7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Red Hat 7.7', '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-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-chroot-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-chroot-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'i686', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'i686', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'i686', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'i686', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'i686', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-license-9.11.4-9.P2.el7_7.1', 'sp':'7', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'i686', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'i686', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'i686', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-utils-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'s390x', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-utils-9.11.4-9.P2.el7_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_7', 'rpm_spec_vers_cmp':TRUE, '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;
  allowmaj = 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 (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  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, allowmaj:allowmaj)) 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-devel / etc');
}