6.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
0.006 Low
EPSS
Percentile
78.7%
Updated qemu-kvm-rhev packages that fix two security issues and three bugs are now available for Red Hat Enterprise Virtualization.
Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM.
A use-after-free flaw was found in the way QEMU’s IDE AHCI emulator processed certain AHCI Native Command Queuing (NCQ) AIO commands. A privileged guest user could use this flaw to crash the QEMU process instance or, potentially, execute arbitrary code on the host with privileges of the QEMU process. (CVE-2016-1568)
An out-of-bounds read/write flaw was discovered in the way QEMU’s Firmware Configuration device emulation processed certain firmware configurations. A privileged (CAP_SYS_RAWIO) guest user could use this flaw to crash the QEMU process instance or, potentially, execute arbitrary code on the host with privileges of the QEMU process.
(CVE-2016-1714)
Red Hat would like to thank Qinghao Tang of Qihoo 360 Marvel Team for reporting the CVE-2016-1568 issue, and Donghai Zhu of Alibaba for reporting the CVE-2016-1714 issue.
This update also fixes the following bugs :
Incorrect handling of the last sector of an image file could trigger an assertion failure in qemu-img. This update changes the handling of the last sector, and no assertion failure occurs. (BZ#1299345)
Previously, rebooting a guest after multiple memory hot-plugs in some cases caused the qemu-kvm process to terminate unexpectedly, and the reboot to fail. This update fixes the problem, and guests with hot-plugged memory reboot successfully. (BZ#1288096)
When the OHCI driver received an interrupt during the suspending process, the interrupt was not acknowledged. As a consequence, the interrupt kept being sent repeatedly, and the system became unresponsive. This update modifies the suspend procedure to acknowledge the interrupt, which prevents the described problem.
(BZ#1298971)
All qemu-kvm-rhev users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
After installing this update, shut down all running virtual machines.
Once all virtual machines have shut down, start them again for this update to take effect.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2016:0084. The text
# itself is copyright (C) Red Hat, Inc.
#
include("compat.inc");
if (description)
{
script_id(117310);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/10/16");
script_cve_id("CVE-2016-1568", "CVE-2016-1714");
script_xref(name:"RHSA", value:"2016:0084");
script_name(english:"RHEL 7 : qemu-kvm-rhev (RHSA-2016:0084)");
script_summary(english:"Checks the rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Red Hat host is missing one or more security updates."
);
script_set_attribute(
attribute:"description",
value:
"Updated qemu-kvm-rhev packages that fix two security issues and three
bugs are now available for Red Hat Enterprise Virtualization.
Red Hat Product Security has rated this update as having Important
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.
KVM (Kernel-based Virtual Machine) is a full virtualization solution
for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package
provides the user-space component for running virtual machines using
KVM.
A use-after-free flaw was found in the way QEMU's IDE AHCI emulator
processed certain AHCI Native Command Queuing (NCQ) AIO commands. A
privileged guest user could use this flaw to crash the QEMU process
instance or, potentially, execute arbitrary code on the host with
privileges of the QEMU process. (CVE-2016-1568)
An out-of-bounds read/write flaw was discovered in the way QEMU's
Firmware Configuration device emulation processed certain firmware
configurations. A privileged (CAP_SYS_RAWIO) guest user could use this
flaw to crash the QEMU process instance or, potentially, execute
arbitrary code on the host with privileges of the QEMU process.
(CVE-2016-1714)
Red Hat would like to thank Qinghao Tang of Qihoo 360 Marvel Team for
reporting the CVE-2016-1568 issue, and Donghai Zhu of Alibaba for
reporting the CVE-2016-1714 issue.
This update also fixes the following bugs :
* Incorrect handling of the last sector of an image file could trigger
an assertion failure in qemu-img. This update changes the handling of
the last sector, and no assertion failure occurs. (BZ#1299345)
* Previously, rebooting a guest after multiple memory hot-plugs in
some cases caused the qemu-kvm process to terminate unexpectedly, and
the reboot to fail. This update fixes the problem, and guests with
hot-plugged memory reboot successfully. (BZ#1288096)
* When the OHCI driver received an interrupt during the suspending
process, the interrupt was not acknowledged. As a consequence, the
interrupt kept being sent repeatedly, and the system became
unresponsive. This update modifies the suspend procedure to
acknowledge the interrupt, which prevents the described problem.
(BZ#1298971)
All qemu-kvm-rhev users are advised to upgrade to these updated
packages, which contain backported patches to correct these issues.
After installing this update, shut down all running virtual machines.
Once all virtual machines have shut down, start them again for this
update to take effect."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2016:0084"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2016-1568"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2016-1714"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libcacard-devel-rhev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libcacard-rhev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libcacard-tools-rhev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-img-rhev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-common-rhev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tools-rhev");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/07");
script_set_attribute(attribute:"patch_publication_date", value:"2016/01/28");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/06");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Red Hat Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2016:0084";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : yum_report
);
exit(0);
}
else
{
audit_message = "affected by Red Hat security advisory " + rhsa;
audit(AUDIT_OS_NOT, audit_message);
}
}
else
{
flag = 0;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"libcacard-devel-rhev-2.3.0-31.el7_2.7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"libcacard-rhev-2.3.0-31.el7_2.7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"libcacard-tools-rhev-2.3.0-31.el7_2.7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-img-rhev-2.3.0-31.el7_2.7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-common-rhev-2.3.0-31.el7_2.7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-rhev-2.3.0-31.el7_2.7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-rhev-debuginfo-2.3.0-31.el7_2.7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-tools-rhev-2.3.0-31.el7_2.7")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get() + redhat_report_package_caveat()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libcacard-devel-rhev / libcacard-rhev / libcacard-tools-rhev / etc");
}
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | libcacard-devel-rhev | p-cpe:/a:redhat:enterprise_linux:libcacard-devel-rhev |
redhat | enterprise_linux | libcacard-rhev | p-cpe:/a:redhat:enterprise_linux:libcacard-rhev |
redhat | enterprise_linux | libcacard-tools-rhev | p-cpe:/a:redhat:enterprise_linux:libcacard-tools-rhev |
redhat | enterprise_linux | qemu-img-rhev | p-cpe:/a:redhat:enterprise_linux:qemu-img-rhev |
redhat | enterprise_linux | qemu-kvm-common-rhev | p-cpe:/a:redhat:enterprise_linux:qemu-kvm-common-rhev |
redhat | enterprise_linux | qemu-kvm-rhev | p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev |
redhat | enterprise_linux | qemu-kvm-rhev-debuginfo | p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev-debuginfo |
redhat | enterprise_linux | qemu-kvm-tools-rhev | p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tools-rhev |
redhat | enterprise_linux | 7 | cpe:/o:redhat:enterprise_linux:7 |
6.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
0.006 Low
EPSS
Percentile
78.7%