4.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5 High
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%
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 :
[3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] Use-after-free in __blk_drain_queue() function. It was found that a use-after-free condition could be triggered in the block device subsystem while the outstanding command queue was drained. A patient local attacker can use this flaw to crash the system or, potentially, to escalate their privileges.
[3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] tun: potential kernel crash when TUNSETIFF ioctl operation is used for a device with an invalid name.
[3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] Certain operations with iptables in a container may crash the kernel.
[3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] A container that tries to mount NFS shares may cause the whole system to hang in certain conditions.
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(133461);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/28");
script_cve_id("CVE-2018-20856", "CVE-2018-7191");
script_name(english:"Virtuozzo 7 : readykernel-patch (VZA-2019-081)");
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 :
- [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21]
Use-after-free in __blk_drain_queue() function. It was
found that a use-after-free condition could be
triggered in the block device subsystem while the
outstanding command queue was drained. A patient local
attacker can use this flaw to crash the system or,
potentially, to escalate their privileges.
- [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21]
tun: potential kernel crash when TUNSETIFF ioctl
operation is used for a device with an invalid name.
- [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21]
Certain operations with iptables in a container may
crash the kernel.
- [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21]
A container that tries to mount NFS shares may cause
the whole system to hang in certain conditions.
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-2019-081");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1716328");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1738705");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-46.7-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8c15051e");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-48.2-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fddf855e");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-63.3-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d7ce08c9");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-64.7-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5c250910");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-73.24-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?72420f9b");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-73.29-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9693c7fe");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-85.17-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?df030fea");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-86.2-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4271804e");
# https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-96.21-89.2-1.vl7/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b0eb04cb");
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:"cvss_score_source", value:"CVE-2018-20856");
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:"2019/10/16");
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) 2020-2024 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-3.10.0-693.21.1.vz7.46.7",
"patch","readykernel-patch-46.7-89.2-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-693.21.1.vz7.48.2",
"patch","readykernel-patch-48.2-89.2-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-862.11.6.vz7.64.7",
"patch","readykernel-patch-63.3-89.2-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-862.20.2.vz7.73.24",
"patch","readykernel-patch-64.7-89.2-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-862.20.2.vz7.73.29",
"patch","readykernel-patch-73.24-89.2-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-862.9.1.vz7.63.3",
"patch","readykernel-patch-73.29-89.2-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-957.10.1.vz7.85.17",
"patch","readykernel-patch-85.17-89.2-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-957.12.2.vz7.86.2",
"patch","readykernel-patch-86.2-89.2-1.vl7"
),
make_array(
"kernel","vzkernel-3.10.0-957.12.2.vz7.96.21",
"patch","readykernel-patch-96.21-89.2-1.vl7"
)
);
readykernel_execute_checks(checks:checks, severity:SECURITY_WARNING, release:"Virtuozzo-7");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20856
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7191
www.nessus.org/u?4271804e
www.nessus.org/u?5c250910
www.nessus.org/u?72420f9b
www.nessus.org/u?8c15051e
www.nessus.org/u?9693c7fe
www.nessus.org/u?b0eb04cb
www.nessus.org/u?d7ce08c9
www.nessus.org/u?df030fea
www.nessus.org/u?fddf855e
bugzilla.redhat.com/show_bug.cgi?id=1716328
bugzilla.redhat.com/show_bug.cgi?id=1738705
virtuozzosupport.force.com/s/article/VZA-2019-081
4.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5 High
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%