Updated qemu-kvm packages that fix multiple security issues and two bugs are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having Moderate 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 package provides the user-space component for running virtual machines using KVM.

Multiple buffer overflow, input validation, and out-of-bounds write flaws were found in the way the virtio, virtio-net, virtio-scsi, and usb drivers of QEMU handled state loading after migration. A user able to alter the savevm data (either on the disk or over the wire during migration) could use either of these flaws to corrupt QEMU process memory on the (destination) host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process. (CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)

An out-of-bounds memory access flaw was found in the way QEMU's IDE device driver handled the execution of SMART EXECUTE OFFLINE commands.
A privileged guest user could use this flaw to corrupt QEMU process memory on the host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process.
(CVE-2014-2894)

The CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, and CVE-2014-3461 issues were discovered by Michael S. Tsirkin of Red Hat, Anthony Liguori, and Michael Roth.

This update also fixes the following bugs :

* Previously, under certain circumstances, libvirt failed to start guests which used a non-zero PCI domain and SR-IOV Virtual Functions (VFs), and returned the following error message :

Can't assign device inside non-zero PCI segment as this KVM module doesn't support it.

This update fixes this issue and guests using the aforementioned configuration no longer fail to start. (BZ#1099941)

* Due to an incorrect initialization of the cpus_sts bitmap, which holds the enablement status of a vCPU, libvirt could fail to start a guest with an unusual vCPU topology (for example, a guest with three cores and two sockets). With this update, the initialization of cpus_sts has been corrected, and libvirt no longer fails to start the aforementioned guests. (BZ#1100575)

All qemu-kvm 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.

Several vulnerabilities were discovered in qemu, a fast processor emulator.

  - CVE-2013-4344     Buffer overflow in the SCSI implementation in QEMU, when     a SCSI controller has more than 256 attached devices,     allows local users to gain privileges via a small     transfer buffer in a REPORT LUNS command.

  - CVE-2014-2894     Off-by-one error in the cmd_smart function in the smart     self test in hw/ide/core.c in QEMU allows local users to     have unspecified impact via a SMART EXECUTE OFFLINE     command that triggers a buffer underflow and memory     corruption.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2014:0743 advisory.

    KVM (Kernel-based Virtual Machine) is a full virtualization solution for     Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the     user-space component for running virtual machines using KVM.

    Multiple buffer overflow, input validation, and out-of-bounds write flaws     were found in the way the virtio, virtio-net, virtio-scsi, and usb drivers     of QEMU handled state loading after migration. A user able to alter the     savevm data (either on the disk or over the wire during migration) could     use either of these flaws to corrupt QEMU process memory on the     (destination) host, which could potentially result in arbitrary code     execution on the host with the privileges of the QEMU process.
    (CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541,     CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)

    An out-of-bounds memory access flaw was found in the way QEMU's IDE device     driver handled the execution of SMART EXECUTE OFFLINE commands.
    A privileged guest user could use this flaw to corrupt QEMU process memory     on the host, which could potentially result in arbitrary code execution on     the host with the privileges of the QEMU process. (CVE-2014-2894)

    The CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536,     CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, and     CVE-2014-3461 issues were discovered by Michael S. Tsirkin of Red Hat,     Anthony Liguori, and Michael Roth.

    This update also fixes the following bugs:

    * Previously, under certain circumstances, libvirt failed to start guests     which used a non-zero PCI domain and SR-IOV Virtual Functions (VFs), and     returned the following error message:

    Can't assign device inside non-zero PCI segment as this KVM module doesn't     support it.

    This update fixes this issue and guests using the aforementioned     configuration no longer fail to start. (BZ#1099941)

    * Due to an incorrect initialization of the cpus_sts bitmap, which holds     the enablement status of a vCPU, libvirt could fail to start a guest with     an unusual vCPU topology (for example, a guest with three cores and two     sockets). With this update, the initialization of cpus_sts has been     corrected, and libvirt no longer fails to start the aforementioned guests.
    (BZ#1100575)

    All qemu-kvm 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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2014-0704 advisory.

    [1.5.3-60.el7_0.2]
    - kvm-pc-add-hot_add_cpu-callback-to-all-machine-types.patch [bz#1094820]
    - Resolves: bz#1094820       (Hot plug CPU not working with RHEL6  machine types running on RHEL7 host.)

    [1.5.3-60.el7_0.1]
    - kvm-iscsi-fix-indentation.patch [bz#1090978]
    - kvm-iscsi-correctly-propagate-errors-in-iscsi_open.patch [bz#1090978]
    - kvm-block-iscsi-query-for-supported-VPD-pages.patch [bz#1090978]
    - kvm-block-iscsi-fix-segfault-if-writesame-fails.patch [bz#1090978]
    - kvm-iscsi-recognize-invalid-field-ASCQ-from-WRITE-SAME-c.patch [bz#1090978]
    - kvm-iscsi-ignore-flushes-on-scsi-generic-devices.patch [bz#1090978]
    - kvm-iscsi-always-query-max-WRITE-SAME-length.patch [bz#1090978]
    - kvm-iscsi-Don-t-set-error-if-already-set-in-iscsi_do_inq.patch [bz#1090978]
    - kvm-iscsi-Remember-to-set-ret-for-iscsi_open-in-error-ca.patch [bz#1090978]
    - kvm-qemu_loadvm_state-shadow-SeaBIOS-for-VM-incoming-fro.patch [1091322]
    - kvm-uhci-UNfix-irq-routing-for-RHEL-6-machtypes-RHEL-onl.patch [bz#1090981]
    - kvm-ide-Correct-improper-smart-self-test-counter-reset-i.patch [bz#1093612]
    - Resolves: bz#1091322       (fail to reboot guest after migration from RHEL6.5 host to RHEL7.0 host)
    - Resolves: bz#1090981       (Guest hits call trace migrate from RHEL6.5 to RHEL7.0 host with -M 6.1 & balloon & uhci device)
    - Resolves: bz#1090978       (qemu-kvm: iSCSI: Failure. SENSE KEY:ILLEGAL_REQUEST(5) ASCQ:INVALID_FIELD_IN_CDB(0x2400))
    - Resolves: bz#1093612       (CVE-2014-2894 qemu-kvm: QEMU: out of bounds buffer accesses, guest triggerable via IDE SMART     [rhel-7.0.z])

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2182-1 advisory.

    Michael S. Tsirkin discovered that QEMU incorrectly handled vmxnet3 devices. A local guest could possibly     use this issue to cause a denial of service, or possibly execute arbitrary code on the host. This issue     only applied to Ubuntu 13.10 and Ubuntu 14.04 LTS. (CVE-2013-4544)

    Michael S. Tsirkin discovered that QEMU incorrectly handled virtio-net MAC addresses. A local guest could     possibly use this issue to cause a denial of service, or possibly execute arbitrary code on the host.
    (CVE-2014-0150)

    Benot Canet discovered that QEMU incorrectly handled SMART self-tests. A local guest could possibly use     this issue to cause a denial of service, or possibly execute arbitrary code on the host. (CVE-2014-2894)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2014:0744 advisory.

    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 in environments     managed by Red Hat Enterprise Virtualization Manager.

    Multiple buffer overflow, input validation, and out-of-bounds write flaws     were found in the way the virtio, virtio-net, virtio-scsi, and usb drivers     of QEMU handled state loading after migration. A user able to alter the     savevm data (either on the disk or over the wire during migration) could     use either of these flaws to corrupt QEMU process memory on the     (destination) host, which could potentially result in arbitrary code     execution on the host with the privileges of the QEMU process.
    (CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541,     CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)

    An out-of-bounds memory access flaw was found in the way QEMU's IDE device     driver handled the execution of SMART EXECUTE OFFLINE commands.
    A privileged guest user could use this flaw to corrupt QEMU process memory     on the host, which could potentially result in arbitrary code execution on     the host with the privileges of the QEMU process. (CVE-2014-2894)

    The CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536,     CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, and     CVE-2014-3461 issues were discovered by Michael S. Tsirkin of Red Hat,     Anthony Liguori, and Michael Roth.

    All users of qemu-kvm-rhev 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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Multiple buffer overflow, input validation, and out-of-bounds write flaws were found in the way the virtio, virtio-net, virtio-scsi, and usb drivers of QEMU handled state loading after migration. A user able to alter the savevm data (either on the disk or over the wire during migration) could use either of these flaws to corrupt QEMU process memory on the (destination) host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process. (CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)

An out-of-bounds memory access flaw was found in the way QEMU's IDE device driver handled the execution of SMART EXECUTE OFFLINE commands.
A privileged guest user could use this flaw to corrupt QEMU process memory on the host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process.
(CVE-2014-2894)

This update also fixes the following bugs :

  - Previously, under certain circumstances, libvirt failed     to start guests which used a non-zero PCI domain and     SR-IOV Virtual Functions (VFs), and returned the     following error message :

Can't assign device inside non-zero PCI segment as this KVM module doesn't support it.

This update fixes this issue and guests using the aforementioned configuration no longer fail to start.

  - Due to an incorrect initialization of the cpus_sts     bitmap, which holds the enablement status of a vCPU,     libvirt could fail to start a guest with an unusual vCPU     topology (for example, a guest with three cores and two     sockets). With this update, the initialization of     cpus_sts has been corrected, and libvirt no longer fails     to start the aforementioned guests.

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.

Several security issues in KVM have been fixed. Some issues could have resulted in arbitrary code execution or crash of the kvm host.

  - virtio-net: buffer overflow in virtio_net_handle_mac()     function. (CVE-2014-0150)

  - Fixed out of bounds buffer accesses, guest triggerable     via IDE SMART. (CVE-2014-2894)

  - Fixed various virtio-net buffer overflows.
    (CVE-2013-4148 / CVE-2013-4149 / CVE-2013-4150 /     CVE-2013-4151)

  - Fixed ahci buffer overrun. (CVE-2013-4526)

  - Fixed hpet buffer overrun. (CVE-2013-4527)

  - Fixed a PCIE-AER buffer overrun. (CVE-2013-4529)

  - Fixed a buffer overrun in pl022. (CVE-2013-4530)

  - Fixed a vmstate buffer overflow. (CVE-2013-4531)

  - Fixed a pxa2xx buffer overrun. (CVE-2013-4533)

  - Fixed a openpic buffer overrun. (CVE-2013-4534)

  - Validate virtio num_sg mapping. (CVE-2013-4535 /     CVE-2013-4536)

  - Fixed ssi-sd buffer overrun. (CVE-2013-4537)

  - Fixed ssd0323 buffer overrun. (CVE-2013-4538)

  - Fixed tsc210x buffer overrun. (CVE-2013-4539)

  - Fixed Zaurus buffer overrun. (CVE-2013-4540)

  - Some USB sanity checking added. (CVE-2013-4541)

  - Fixed virtio scsi buffer overrun. (CVE-2013-4542)

  - Fixed another virtio buffer overrun. (CVE-2013-6399)

  - Validate config_len on load in virtio (CVE-2014-0182)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2014:0704 advisory.

    KVM (Kernel-based Virtual Machine) is a full virtualization solution for     Linux on AMD64 and Intel 64 systems. The qemu-kvm packages provide a     user-space component to run virtual machines using KVM.

    An out-of-bounds memory access flaw was found in the way QEMU's IDE device     driver handled the execution of SMART EXECUTE OFFLINE commands.
    A privileged guest user could use this flaw to corrupt QEMU process memory     on the host, which could potentially result in arbitrary code execution on     the host with the privileges of the QEMU process. (CVE-2014-2894)

    This update also fixes the following bugs:

    * Prior to this update, a bug in the migration code caused the following     error on specific machine types: after a Red Hat Enterprise Linux 6.5 guest     was migrated from a Red Hat Enterprise Linux 6.5 host to a Red Hat     Enterprise Linux 7.0 host and then restarted, the boot failed and the guest     automatically restarted. Thus, the guest entered an endless loop. With this     update, the migration code has been fixed and the Red Hat Enterprise Linux     6.5 guests migrated in the aforementioned scenario now boot properly.
    (BZ#1091322)

    * Due to a regression bug in the iSCSI driver, the qemu-kvm process     terminated unexpectedly with a segmentation fault when the write same     command was executed in guest mode under the iSCSI protocol. This update     fixes the regression and the write same command now functions in guest     mode under iSCSI as intended. (BZ#1090978)

    * Due to a mismatch in interrupt request (IRQ) routing, migration of a Red     Hat Enterprise Linux 6.5 guest from a Red Hat Enterprise Linux 6.5 host to     a Red Hat Enterprise Linux 7.0 host could produce a call trace.
    This happened if memory ballooning and a Universal Host Control Interface     (UHCI) device were used at the same time on certain machine types.
    With this patch, the IRQ routing mismatch has been amended and the     described migration now proceeds as expected. (BZ#1090981)

    * Previously, an internal error prevented KVM from executing a CPU hot plug     on a Red Hat Enterprise Linux 7 guest running on a Red Hat Enterprise Linux     7 host. This update addresses the internal error and CPU hot plugging in     the described scenario now functions correctly. (BZ#1094820)

    All qemu-kvm 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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-201408-17 (QEMU: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in QEMU. Please review the       CVE identifiers referenced below for details.
  Impact :

    A local attacker could possibly execute arbitrary code with the       privileges of the process, or cause a Denial of       Service condition.
  Workaround :

    There is no known workaround at this time.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
74474	CentOS 6 : qemu-kvm (CESA-2014:0743)	Nessus	CentOS Local Security Checks	2014/6/12	2021/1/4	high
74095	Debian DSA-2932-1 : qemu - security update	Nessus	Debian Local Security Checks	2014/5/20	2021/1/11	high
74461	RHEL 6 : qemu-kvm (RHSA-2014:0743)	Nessus	Red Hat Local Security Checks	2014/6/11	2025/4/15	high
76737	Oracle Linux 7 : qemu-kvm (ELSA-2014-0704)	Nessus	Oracle Linux Local Security Checks	2014/7/24	2024/11/1	critical
73752	Ubuntu 14.04 LTS : QEMU vulnerabilities (USN-2182-1)	Nessus	Ubuntu Local Security Checks	2014/4/29	2024/8/27	critical
79030	RHEL 6 : qemu-kvm-rhev (RHSA-2014:0744)	Nessus	Red Hat Local Security Checks	2014/11/8	2025/4/15	high
74490	Scientific Linux Security Update : qemu-kvm on SL6.x i386/x86_64 (20140610)	Nessus	Scientific Linux Local Security Checks	2014/6/12	2021/1/14	high
76138	SuSE 11.3 Security Update : KVM (SAT Patch Number 9302)	Nessus	SuSE Local Security Checks	2014/6/19	2021/1/19	high
76899	RHEL 7 : qemu-kvm (RHSA-2014:0704)	Nessus	Red Hat Local Security Checks	2014/7/30	2025/4/15	high
77461	GLSA-201408-17 : QEMU: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2014/8/30	2021/1/6	high

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