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 :
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(133451);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id(
"CVE-2018-18397"
);
script_name(english:"Virtuozzo 7 : readykernel-patch (VZA-2019-006)");
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 :
- A flaw was found in the implementation of userfaultfd.
An attacker is able to bypass file permissions on
filesystems mounted with tmpfs/hugetlbs to modify a
file and possibly disrupt normal system behaviour. At
this time there is an understanding there is no crash
or priviledge escalation but the impact of
modifications on these filesystems of files in
production systems may have adverse affects.
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-2019-006");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1641548");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-37.30-71.0-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9219887e");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-40.4-71.0-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0756d063");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-43.10-71.0-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1590c30d");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-46.7-71.0-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2dca2d49");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-48.2-71.0-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3f485927");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-63.3-71.0-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?699a3a98");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-64.7-71.0-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ab5fc4d9");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-73.24-71.0-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a2f4cb56");
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:P/A:N");
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:N/I:H/A:N");
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:"2019/02/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/04");
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) 2020-2021 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-3.10.0-693.1.1.vz7.37.30",
"patch","readykernel-patch-37.30-71.0-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-693.11.6.vz7.40.4",
"patch","readykernel-patch-40.4-71.0-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-693.17.1.vz7.43.10",
"patch","readykernel-patch-43.10-71.0-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-693.21.1.vz7.46.7",
"patch","readykernel-patch-46.7-71.0-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-693.21.1.vz7.48.2",
"patch","readykernel-patch-48.2-71.0-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-862.9.1.vz7.63.3",
"patch","readykernel-patch-63.3-71.0-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-862.11.6.vz7.64.7",
"patch","readykernel-patch-64.7-71.0-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-862.20.2.vz7.73.24",
"patch","readykernel-patch-73.24-71.0-1.vl7"
)
);
readykernel_execute_checks(checks:checks, severity:SECURITY_NOTE, release:"Virtuozzo-7");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18397
www.nessus.org/u?0756d063
www.nessus.org/u?1590c30d
www.nessus.org/u?2dca2d49
www.nessus.org/u?3f485927
www.nessus.org/u?699a3a98
www.nessus.org/u?9219887e
www.nessus.org/u?a2f4cb56
www.nessus.org/u?ab5fc4d9
bugzilla.redhat.com/show_bug.cgi?id=1641548
virtuozzosupport.force.com/s/article/VZA-2019-006