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nessusThis script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.VIRTUOZZO_VZA-2020-038.NASL
HistoryMay 22, 2020 - 12:00 a.m.

Virtuozzo 7 : readykernel-patch (VZA-2020-038)

2020-05-2200:00:00
This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
20

6.4 Medium

AI Score

Confidence

High

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 :

  • [3.10.0-862.20.2.vz7.73.24 to 3.10.0-1062.4.2.vz7.116.7] Use-after-free read in napi_gro_frags(). A flaw was found in the implementation of GRO, which allows an attacker with local access to trigger a use-after-free read in napi_gro_frags() and, potentially, crash the system.

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(136805);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/12");

  script_cve_id("CVE-2020-10720");

  script_name(english:"Virtuozzo 7 : readykernel-patch (VZA-2020-038)");

  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 :

  - [3.10.0-862.20.2.vz7.73.24 to
    3.10.0-1062.4.2.vz7.116.7] Use-after-free read in
    napi_gro_frags(). A flaw was found in the
    implementation of GRO, which allows an attacker with
    local access to trigger a use-after-free read in
    napi_gro_frags() and, potentially, crash the system.

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://virtuozzosupport.force.com/s/article/VZA-2020-038");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1781204");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-116.7-106.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9bf4ecc2");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-131.10-106.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?66935457");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-73.24-106.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?43e08109");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-73.29-106.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?31659d32");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-85.17-106.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?65761ae2");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-86.2-106.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?64d4773b");
  # https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-96.21-106.0-1.vl7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?05d98896");
  script_set_attribute(attribute:"solution", value:
"Update the readykernel patch.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:L/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-2020-10720");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/22");

  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) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/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-3.10.0-862.20.2.vz7.73.24",
    "patch","readykernel-patch-116.7-106.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-862.20.2.vz7.73.29",
    "patch","readykernel-patch-131.10-106.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-957.10.1.vz7.85.17",
    "patch","readykernel-patch-73.24-106.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-957.12.2.vz7.86.2",
    "patch","readykernel-patch-73.29-106.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-957.12.2.vz7.96.21",
    "patch","readykernel-patch-85.17-106.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-1062.4.2.vz7.116.7",
    "patch","readykernel-patch-86.2-106.0-1.vl7"
  ),
  make_array(
    "kernel","vzkernel-3.10.0-1062.12.1.vz7.131.10",
    "patch","readykernel-patch-96.21-106.0-1.vl7"
  )
);
readykernel_execute_checks(checks:checks, severity:SECURITY_WARNING, release:"Virtuozzo-7");