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nessusThis script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.VIRTUOZZO_VZA-2017-120.NASL
HistoryDec 28, 2017 - 12:00 a.m.

Virtuozzo 7 : readykernel-patch (VZA-2017-120)

2017-12-2800:00:00
This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
60

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 vulnerability :

  • The sctp_do_peeloff() function in the Linux kernel before 4.14 did not check whether the intended netns was used in a peel-off action, which allowed local users to cause a denial of service (use-after-free in sctp_cmp_addr_exact() resulting in system crash) or possibly have unspecified other impact via crafted 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.

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

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

if (description)
{
  script_id(105464);
  script_version("3.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");

  script_cve_id(
    "CVE-2017-15115"
  );

  script_name(english:"Virtuozzo 7 : readykernel-patch (VZA-2017-120)");
  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 vulnerability :

  - The sctp_do_peeloff() function in the Linux kernel
    before 4.14 did not check whether the intended netns
    was used in a peel-off action, which allowed local
    users to cause a denial of service (use-after-free in
    sctp_cmp_addr_exact() resulting in system crash) or
    possibly have unspecified other impact via crafted
    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/2912489");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.10-41.1-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e526b6e1");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.15-41.1-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?52a7138b");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-33.22-41.1-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?74d1347f");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-37.30-41.1-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b88eb898");
  script_set_attribute(attribute:"solution", value:"Update the readykernel patch.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/28");

  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) 2017-2021 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-30.10-41.1-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-514.16.1.vz7.30.15",
    "patch","readykernel-patch-30.15-41.1-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-514.26.1.vz7.33.22",
    "patch","readykernel-patch-33.22-41.1-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-693.1.1.vz7.37.30",
    "patch","readykernel-patch-37.30-41.1-1.vl7"
  )
);
readykernel_execute_checks(checks:checks, severity:SECURITY_HOLE, release:"Virtuozzo-7");