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 :
The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel through 4.11.3 is too late in checking whether an overwrite of an skb data structure may occur, which allows local users to cause a denial of service (system crash) via crafted system calls.
A divide-by-zero vulnerability was found in the
__tcp_select_window function in the Linux kernel. This can result in a kernel panic causing a local denial-of-service.
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(102979);
script_version("3.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id(
"CVE-2017-14106",
"CVE-2017-9242"
);
script_name(english:"Virtuozzo 7 : readykernel-patch (VZA-2017-077)");
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 :
- The __ip6_append_data function in net/ipv6/ip6_output.c
in the Linux kernel through 4.11.3 is too late in
checking whether an overwrite of an skb data structure
may occur, which allows local users to cause a denial
of service (system crash) via crafted system calls.
- A divide-by-zero vulnerability was found in the
__tcp_select_window function in the Linux kernel. This
can result in a kernel panic causing a local
denial-of-service.
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/2870907");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-15.2-30.3-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8cc3d032");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-18.7-30.3-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?68ad1633");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-20.18-30.3-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0f4fe5aa");
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:"patch_publication_date", value:"2017/09/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/07");
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-3.10.0-327.18.2.vz7.15.2",
"patch","readykernel-patch-15.2-30.3-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-327.36.1.vz7.18.7",
"patch","readykernel-patch-18.7-30.3-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-327.36.1.vz7.20.18",
"patch","readykernel-patch-20.18-30.3-1.vl7"
)
);
readykernel_execute_checks(checks:checks, severity:SECURITY_WARNING, release:"Virtuozzo-7");