CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
82.5%
According to the versions of the qemu-kvm packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
A flaw was found in QEMU’s Media Transfer Protocol (MTP) where a path traversal in the in usb_mtp_write_data function in hw/usb/dev-mtp.c due to an improper file name sanitization. Reading and writing of arbitrary files is allowed when a guest device is mounted which may lead to a denial of service scenario or possibly lead to code execution on the host.(CVE-2018-16867)
A flaw was found in QEMU’s Media Transfer Protocol (MTP). The code opening files in usb_mtp_get_object and usb_mtp_get_partial_object and directories in usb_mtp_object_readdir doesn’t consider that the underlying filesystem may have changed since the time lstat(2) was called in usb_mtp_object_alloc, a classical TOCTTOU problem. An attacker with write access to the host filesystem, shared with a guest, can use this property to navigate the host filesystem in the context of the QEMU process and read any file the QEMU process has access to. Access to the filesystem may be local or via a network share protocol such as CIFS.(CVE-2018-16872)
hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an fid path while it is being accessed by a second thread, leading to (for example) a use-after-free outcome.(CVE-2018-19364)
v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS users to cause a denial of service (crash) because of a race condition during file renaming.(CVE-2018-19489)
hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).(CVE-2018-20191)
QEMU, through version 2.10 and through version 3.1.0, is vulnerable to an out-of-bounds read of up to 128 bytes in the hw/i2c/i2c-ddc.c:i2c_ddc() function. A local attacker with permission to execute i2c commands could exploit this to read stack memory of the qemu process on the host.(CVE-2019-3812)
In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.(CVE-2019-6778)
Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS 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(128184);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
script_cve_id(
"CVE-2018-16867",
"CVE-2018-16872",
"CVE-2018-19364",
"CVE-2018-19489",
"CVE-2018-20191",
"CVE-2019-3812",
"CVE-2019-6778"
);
script_name(english:"EulerOS 2.0 SP8 : qemu-kvm (EulerOS-SA-2019-1815)");
script_summary(english:"Checks the rpm output for the updated packages.");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the qemu-kvm packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :
- A flaw was found in QEMU's Media Transfer Protocol
(MTP) where a path traversal in the in
usb_mtp_write_data function in hw/usb/dev-mtp.c due to
an improper file name sanitization. Reading and writing
of arbitrary files is allowed when a guest device is
mounted which may lead to a denial of service scenario
or possibly lead to code execution on the
host.(CVE-2018-16867)
- A flaw was found in QEMU's Media Transfer Protocol
(MTP). The code opening files in usb_mtp_get_object and
usb_mtp_get_partial_object and directories in
usb_mtp_object_readdir doesn't consider that the
underlying filesystem may have changed since the time
lstat(2) was called in usb_mtp_object_alloc, a
classical TOCTTOU problem. An attacker with write
access to the host filesystem, shared with a guest, can
use this property to navigate the host filesystem in
the context of the QEMU process and read any file the
QEMU process has access to. Access to the filesystem
may be local or via a network share protocol such as
CIFS.(CVE-2018-16872)
- hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an
fid path while it is being accessed by a second thread,
leading to (for example) a use-after-free
outcome.(CVE-2018-19364)
- v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS
users to cause a denial of service (crash) because of a
race condition during file renaming.(CVE-2018-19489)
- hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a
read operation (such as uar_read by analogy to
uar_write), which allows attackers to cause a denial of
service (NULL pointer dereference).(CVE-2018-20191)
- QEMU, through version 2.10 and through version 3.1.0,
is vulnerable to an out-of-bounds read of up to 128
bytes in the hw/i2c/i2c-ddc.c:i2c_ddc() function. A
local attacker with permission to execute i2c commands
could exploit this to read stack memory of the qemu
process on the host.(CVE-2019-3812)
- In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a
heap-based buffer overflow.(CVE-2019-6778)
Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
# https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-1815
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9661b617");
script_set_attribute(attribute:"solution", value:
"Update the affected qemu-kvm packages.");
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: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:"cvss_score_source", value:"CVE-2019-6778");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"patch_publication_date", value:"2019/08/28");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/27");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-alsa");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-oss");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-pa");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-sdl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-curl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-dmg");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-gluster");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-iscsi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-nfs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-rbd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-ssh");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-img");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-system-aarch64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-system-aarch64-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-curses");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-gtk");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-sdl");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
script_exclude_keys("Host/EulerOS/uvp_version");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(8)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8", "EulerOS UVP " + uvp);
if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);
flag = 0;
pkgs = ["qemu-audio-alsa-3.0.0-4.h1.eulerosv2r8",
"qemu-audio-oss-3.0.0-4.h1.eulerosv2r8",
"qemu-audio-pa-3.0.0-4.h1.eulerosv2r8",
"qemu-audio-sdl-3.0.0-4.h1.eulerosv2r8",
"qemu-block-curl-3.0.0-4.h1.eulerosv2r8",
"qemu-block-dmg-3.0.0-4.h1.eulerosv2r8",
"qemu-block-gluster-3.0.0-4.h1.eulerosv2r8",
"qemu-block-iscsi-3.0.0-4.h1.eulerosv2r8",
"qemu-block-nfs-3.0.0-4.h1.eulerosv2r8",
"qemu-block-rbd-3.0.0-4.h1.eulerosv2r8",
"qemu-block-ssh-3.0.0-4.h1.eulerosv2r8",
"qemu-common-3.0.0-4.h1.eulerosv2r8",
"qemu-img-3.0.0-4.h1.eulerosv2r8",
"qemu-kvm-3.0.0-4.h1.eulerosv2r8",
"qemu-system-aarch64-3.0.0-4.h1.eulerosv2r8",
"qemu-system-aarch64-core-3.0.0-4.h1.eulerosv2r8",
"qemu-ui-curses-3.0.0-4.h1.eulerosv2r8",
"qemu-ui-gtk-3.0.0-4.h1.eulerosv2r8",
"qemu-ui-sdl-3.0.0-4.h1.eulerosv2r8"];
foreach (pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"8", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-kvm");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16867
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16872
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19364
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19489
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20191
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3812
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6778
www.nessus.org/u?9661b617
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
82.5%