CentOS 7 : bind, bind-dyndb-ldap, and dhcp (RHSA-2024:3741)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2024:3741.
##

include('compat.inc');

if (description)
{
  script_id(200727);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/19");

  script_cve_id("CVE-2023-4408", "CVE-2023-50387", "CVE-2023-50868");
  script_xref(name:"IAVA", value:"2024-A-0103");
  script_xref(name:"RHSA", value:"2024:3741");

  script_name(english:"CentOS 7 : bind, bind-dyndb-ldap, and dhcp (RHSA-2024:3741)");

  script_set_attribute(attribute:"synopsis", value:
"The remote CentOS Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the
RHSA-2024:3741 advisory.

  - The DNS message parsing code in `named` includes a section whose computational complexity is overly high.
    It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive
    CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative
    servers and recursive resolvers. This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through
    9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1
    through 9.18.21-S1. (CVE-2023-4408)

  - Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote
    attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the
    KeyTrap issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the
    protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG
    records. (CVE-2023-50387)

  - The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped)
    allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC
    responses in a random subdomain attack, aka the NSEC3 issue. The RFC 5155 specification implies that an
    algorithm must perform thousands of iterations of a hash function in certain situations. (CVE-2023-50868)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2024:3741");
  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:C");
  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-2023-50387");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/02/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/06/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/06/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-chroot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-dyndb-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-export-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-export-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-libs-lite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-license");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-lite-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-pkcs11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-pkcs11-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-pkcs11-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-pkcs11-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-sdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-sdb-chroot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bind-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-libs");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/CentOS/release');
if (isnull(os_release) || 'CentOS' >!< os_release) audit(AUDIT_OS_NOT, 'CentOS');
var os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '7')) audit(AUDIT_OS_NOT, 'CentOS 7.x', 'CentOS ' + os_ver);

if (!get_kb_item('Host/CentOS/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 && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CentOS', cpu);

var pkgs = [
    {'reference':'bind-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-chroot-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-chroot-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-dyndb-ldap-11.1-7.el7_9.1', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'bind-dyndb-ldap-11.1-7.el7_9.1', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'bind-export-devel-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-license-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-license-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-utils-9.11.4-26.P2.el7_9.16', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-utils-9.11.4-26.P2.el7_9.16', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'dhclient-4.2.5-83.el7_9.2', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhclient-4.2.5-83.el7_9.2', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhcp-4.2.5-83.el7_9.2', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhcp-4.2.5-83.el7_9.2', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhcp-common-4.2.5-83.el7_9.2', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhcp-common-4.2.5-83.el7_9.2', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhcp-devel-4.2.5-83.el7_9.2', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhcp-devel-4.2.5-83.el7_9.2', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhcp-libs-4.2.5-83.el7_9.2', 'cpu':'ppc64le', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
    {'reference':'dhcp-libs-4.2.5-83.el7_9.2', 'cpu':'x86_64', 'release':'CentOS-7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  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;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = 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_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, 'bind / bind-chroot / bind-devel / etc');
}