Virtuozzo 7 : readykernel-patch (VZA-2018-049)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(111527);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");

  script_cve_id(
    "CVE-2018-13405"
  );

  script_name(english:"Virtuozzo 7 : readykernel-patch (VZA-2018-049)");
  script_summary(english:"Checks the readykernel output for the updated patch.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Virtuozzo host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to the version of the vzkernel package and the
readykernel-patch installed, the Virtuozzo installation on the remote
host is affected by the following vulnerabilities :

  - It was discovered that the local users could create
    files with an unintended group ownership and with group
    execution and SGID permission bits set. It was possible
    when a directory was SGID, belonged to a certain group
    and was writable by a user who was not a member of this
    group. This could lead to excessive permissions granted
    in case when they should not.

  - A flaw was discovered in the implementation of SCTP
    protocol. A local unprivileged user could exploit it to
    cause soft lockups in the kernel (and, eventually, a
    denial of service) using specially crafted sequences of
    system calls.

Note that Tenable Network Security has extracted the preceding
description block directly from the Virtuozzo security advisory.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://help.virtuozzo.com/customer/portal/articles/2950393");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-13405");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.10-55.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?28b5b224");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.15-55.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?62a1c3be");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-33.22-55.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?df1c60b5");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-37.30-55.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?682e78e4");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-40.4-55.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?31d7a581");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-43.10-55.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ab4d9222");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-46.7-55.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d82aff40");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-48.2-55.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6e739f8e");
  script_set_attribute(attribute:"solution", value:"Update the readykernel patch.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:readykernel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:virtuozzo:virtuozzo:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2018-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include("global_settings.inc");
include("readykernel.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/Virtuozzo/release");
if (isnull(release) || "Virtuozzo" >!< release) audit(AUDIT_OS_NOT, "Virtuozzo");
os_ver = pregmatch(pattern: "Virtuozzo Linux release ([0-9]+\.[0-9])(\D|$)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Virtuozzo");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Virtuozzo 7.x", "Virtuozzo " + os_ver);

if (!get_kb_item("Host/Virtuozzo/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, "Virtuozzo", cpu);

rk_info = get_kb_item("Host/readykernel-info");
if (empty_or_null(rk_info)) audit(AUDIT_UNKNOWN_APP_VER, "Virtuozzo");

checks = make_list2(
  make_array(
    "kernel","vzkernel-3.10.0-514.16.1.vz7.30.10",
    "patch","readykernel-patch-30.10-55.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-514.16.1.vz7.30.15",
    "patch","readykernel-patch-30.15-55.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-514.26.1.vz7.33.22",
    "patch","readykernel-patch-33.22-55.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-693.1.1.vz7.37.30",
    "patch","readykernel-patch-37.30-55.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-693.11.6.vz7.40.4",
    "patch","readykernel-patch-40.4-55.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-693.17.1.vz7.43.10",
    "patch","readykernel-patch-43.10-55.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-693.21.1.vz7.46.7",
    "patch","readykernel-patch-46.7-55.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-693.21.1.vz7.48.2",
    "patch","readykernel-patch-48.2-55.0-1.vl7"
  )
);
readykernel_execute_checks(checks:checks, severity:SECURITY_WARNING, release:"Virtuozzo-7");