OracleVM 3.4 : dhcp (OVMSA-2018-0023)

#
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from OracleVM
# Security Advisory OVMSA-2018-0023.
#

include("compat.inc");

if (description)
{
  script_id(107248);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/10");

  script_cve_id("CVE-2018-5732", "CVE-2018-5733");
  script_xref(name:"IAVB", value:"2018-B-0034-S");

  script_name(english:"OracleVM 3.4 : dhcp (OVMSA-2018-0023)");
  script_summary(english:"Checks the RPM output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote OracleVM host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote OracleVM system is missing necessary patches to address
critical security updates :

  - Added oracle-errwarn-message.patch

  - Resolves: #1550085 - CVE-2018-5733 Avoid reference
    overflow

<[12:4.1.1-53.P1.2

  - Resolves: #1550083 - CVE-2018-5732 Avoid options buffer
    overflow

  - Resolves: #1063217 - failover hangs with both
    potential-conflict

  - Resolves: #1363790 - dhclient does not update routing
    table after the lease &nbsp  expiry

  - Resolves: #1321945 - dhclient hook script for Azure
    cloud

  - send unicast request/release via correct interface
    (#1297445)

  - Lease table overflow crash. (#1133917)

  - Add ignore-client-uids option. (#1196768)

  - dhclient-script: it's OK if the arping reply comes from
    our system. (#1204095)

  - VLAN ID is only bottom 12-bits of TCI. (#1259552)

  - dhclient: Make sure link-local address is ready in
    stateless mode. (#1263466)

  - dhclient-script: make_resolv_conf: Keep old nameservers
    &nbsp  if server sends domain-name/search, but no
    nameservers. (#1269595)"
  );
  # https://oss.oracle.com/pipermail/oraclevm-errata/2018-March/000834.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?cf73ec61"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected dhclient / dhcp-common 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:oracle:vm:dhclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:dhcp-common");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:vm_server:3.4");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/09");
  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_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"OracleVM Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/OracleVM/release");
if (isnull(release) || "OVS" >!< release) audit(AUDIT_OS_NOT, "OracleVM");
if (! preg(pattern:"^OVS" + "3\.4" + "(\.[0-9]|$)", string:release)) audit(AUDIT_OS_NOT, "OracleVM 3.4", "OracleVM " + release);
if (!get_kb_item("Host/OracleVM/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "OracleVM", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

flag = 0;
if (rpm_check(release:"OVS3.4", reference:"dhclient-4.1.1-53.P1.0.1.el6_9.3")) flag++;
if (rpm_check(release:"OVS3.4", reference:"dhcp-common-4.1.1-53.P1.0.1.el6_9.3")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "dhclient / dhcp-common");
}