OracleVM 3.3 / 3.4 : openssh (OVMSA-2019-0013)

#
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from OracleVM
# Security Advisory OVMSA-2019-0013.
#

include('compat.inc');

if (description)
{
  script_id(124013);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");

  script_cve_id("CVE-2018-15473");

  script_name(english:"OracleVM 3.3 / 3.4 : openssh (OVMSA-2019-0013)");

  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 :

  - Fix for CVE-2018-15473: User enumeration via malformed
    packets in authentication requests");
  # https://oss.oracle.com/pipermail/oraclevm-errata/2019-April/000934.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ab1a2106");
  # https://oss.oracle.com/pipermail/oraclevm-errata/2019-April/000935.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?30797943");
  script_set_attribute(attribute:"solution", value:
"Update the affected openssh / openssh-clients / openssh-server
packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-15473");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:openssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:openssh-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:openssh-server");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:vm_server:3.3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:vm_server:3.4");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/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\.3|3\.4)" + "(\.[0-9]|$)", string:release)) audit(AUDIT_OS_NOT, "OracleVM 3.3 / 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:"OVS3.3", reference:"openssh-5.3p1-124.el6_10")) flag++;
if (rpm_check(release:"OVS3.3", reference:"openssh-clients-5.3p1-124.el6_10")) flag++;
if (rpm_check(release:"OVS3.3", reference:"openssh-server-5.3p1-124.el6_10")) flag++;

if (rpm_check(release:"OVS3.4", reference:"openssh-5.3p1-124.el6_10")) flag++;
if (rpm_check(release:"OVS3.4", reference:"openssh-clients-5.3p1-124.el6_10")) flag++;
if (rpm_check(release:"OVS3.4", reference:"openssh-server-5.3p1-124.el6_10")) 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, "openssh / openssh-clients / openssh-server");
}