Updated qemu packages fix multiple security vulnerabilities :

Sibiao Luo discovered that QEMU incorrectly handled device hot-unplugging. A local user could possibly use this flaw to cause a denial of service (CVE-2013-4377).

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 (CVE-2013-4544).

Multiple integer overflow, input validation, logic error, and buffer overflow flaws were discovered in various QEMU block drivers. An attacker able to modify a disk image file loaded by a guest could use these flaws to crash the guest, or corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process (CVE-2014-0143, CVE-2014-0144, CVE-2014-0145, CVE-2014-0147).

A buffer overflow flaw was found in the way the virtio_net_handle_mac() function of QEMU processed guest requests to update the table of MAC addresses. A privileged guest user could use this flaw to corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process (CVE-2014-0150).

A divide-by-zero flaw was found in the seek_to_sector() function of the parallels block driver in QEMU. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest (CVE-2014-0142).

A NULL pointer dereference flaw was found in the QCOW2 block driver in QEMU. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest (CVE-2014-0146).

It was found that the block driver for Hyper-V VHDX images did not correctly calculate BAT (Block Allocation Table) entries due to a missing bounds check. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest (CVE-2014-0148).

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).

Two integer overflow flaws were found in the QEMU block driver for QCOW version 1 disk images. A user able to alter the QEMU disk image files loaded by a guest could use either of these flaws 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-2014-0222, CVE-2014-0223).

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 information leak flaw was found in the way QEMU's VGA emulator accessed frame buffer memory for high resolution displays. A privileged guest user could use this flaw to leak memory contents of the host to the guest by setting the display to use a high resolution in the guest (CVE-2014-3615).

When guest sends udp packet with source port and source addr 0, uninitialized socket is picked up when looking for matching and already created udp sockets, and later passed to sosendto() where NULL pointer dereference is hit during so->slirp->vnetwork_mask.s_addr access Only guests using qemu user networking are affected (CVE-2014-3640).

The Advanced Threat Research team at Intel Security reported that guest provided parameter were insufficiently validated in rectangle functions in the vmware-vga driver. A privileged guest user could use this flaw to write into qemu address space on the host, potentially escalating their privileges to those of the qemu host process (CVE-2014-3689).

It was discovered that QEMU incorrectly handled USB xHCI controller live migration. An attacker could possibly use this issue to cause a denial of service, or possibly execute arbitrary code (CVE-2014-5263).

James Spadaro of Cisco reported insufficiently sanitized bits_per_pixel from the client in the QEMU VNC display driver. An attacker having access to the guest's VNC console could use this flaw to crash the guest (CVE-2014-7815).

During migration, the values read from migration stream during ram load are not validated. Especially offset in host_from_stream_offset() and also the length of the writes in the callers of the said function.
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-2014-7840).

Paolo Bonzini of Red Hat discovered that the blit region checks were insufficient in the Cirrus VGA emulator in qemu. A privileged guest user could use this flaw to write into qemu address space on the host, potentially escalating their privileges to those of the qemu host process (CVE-2014-8106).

This update also provides usbredirparser 0.6 as a prerequisite of qemu-1.6.2

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Heap-based buffer overflow in the virtio_load function in hw/virtio/virtio.c in QEMU before 1.7.2 might     allow remote attackers to execute arbitrary code via a crafted config length in a savevm image.
    (CVE-2014-0182)

Note that Nessus relies on the presence of the package as reported by the vendor.

- Migration CVEs: CVE-2014-0182 etc.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2014-0743 advisory.

    [0.12.1.2-2.415.el6_5.10]
    - kvm-virtio-out-of-bounds-buffer-write-on-invalid-state-l.patch [bz#1095692]
    - kvm-usb-sanity-check-setup_index-setup_len-in-post_load.patch [bz#1095743]
    - kvm-usb-sanity-check-setup_index-setup_len-in-post_load-2.patch [bz#1095743]
    - kvm-virtio-scsi-fix-buffer-overrun-on-invalid-state-load.patch [bz#1095739]
    - kvm-virtio-avoid-buffer-overrun-on-incoming-migration.patch [bz#1095735]
    - kvm-virtio-validate-num_sg-when-mapping.patch [bz#1095763 bz#1096124]
    - kvm-virtio-allow-mapping-up-to-max-queue-size.patch [bz#1095763 bz#1096124]
    - kvm-enable-PCI-multiple-segments-for-pass-through-device.patch [bz#1099941]
    - kvm-virtio-net-fix-buffer-overflow-on-invalid-state-load.patch [bz#1095675]
    - kvm-virtio-validate-config_len-on-load.patch [bz#1095779]
    - kvm-usb-fix-up-post-load-checks.patch [bz#1096825]
    - kvm-CPU-hotplug-use-apic_id_for_cpu-round-2-RHEL-6-only.patch [bz#1100575]
    - Resolves: bz#1095675       ()
    - Resolves: bz#1095692       ()
    - Resolves: bz#1095735       ()
    - Resolves: bz#1095739       ()
    - Resolves: bz#1095743       ()
    - Resolves: bz#1095763       ()
    - Resolves: bz#1095779       ()
    - Resolves: bz#1096124       ()
    - Resolves: bz#1096825       ()
    - Resolves: bz#1099941       ()
    - Resolves: bz#1100575       (Some vCPU topologies not accepted by libvirt)

    [0.12.1.2-2.415.el6_5.9]
    - kvm-ide-Correct-improper-smart-self-test-counter-reset-i.patch [bz#1087978]
    - Resolves: bz#1087978       (CVE-2014-2894 qemu-kvm: QEMU: out of bounds buffer accesses, guest triggerable via IDE SMART     [rhel-6.5.z])

Tenable has extracted the preceding description block directly from the Oracle 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 multiple vulnerabilities as referenced in the ELSA-2014-0927 advisory.

    - Resolves: bz#1095782       (CVE-2014-0182 qemu-kvm: qemu: virtio: out-of-bounds buffer write on state load with invalid config_len     [rhel-7.0.z])
    - kvm-qcow1-Validate-L2-table-size-CVE-2014-0222.patch [bz#1097229]
    - kvm-qcow1-Validate-image-size-CVE-2014-0223.patch [bz#1097236]
    - Resolves: bz#1095677       (CVE-2013-4148 qemu-kvm: qemu: virtio-net: buffer overflow on invalid state load [rhel-7.0.z])
    - Resolves: bz#1095684       (CVE-2013-4149 qemu-kvm: qemu: virtio-net: out-of-bounds buffer write on load [rhel-7.0.z])
    - Resolves: bz#1095689       (CVE-2013-4150 qemu-kvm: qemu: virtio-net: out-of-bounds buffer write on invalid state load     [rhel-7.0.z])
    - Resolves: bz#1095694       (CVE-2013-4151 qemu-kvm: qemu: virtio: out-of-bounds buffer write on invalid state load [rhel-7.0.z])
    - Resolves: bz#1095706       (CVE-2013-4527 qemu-kvm: qemu: hpet: buffer overrun on invalid state load [rhel-7.0.z])
    - Resolves: bz#1095714       (CVE-2013-4529 qemu-kvm: qemu: hw/pci/pcie_aer.c: buffer overrun on invalid state load [rhel-7.0.z])
    - Resolves: bz#1095737       (CVE-2013-6399 qemu-kvm: qemu: virtio: buffer overrun on incoming migration [rhel-7.0.z])
    - Resolves: bz#1095741       (CVE-2013-4542 qemu-kvm: qemu: virtio-scsi: buffer overrun on invalid state load [rhel-7.0.z])
    - Resolves: bz#1095746       (CVE-2013-4541 qemu-kvm: qemu: usb: insufficient sanity checking of setup_index+setup_len in post_load     [rhel-7.0.z])
    - Resolves: bz#1095765       (CVE-2013-4535 CVE-2013-4536 qemu-kvm: qemu: virtio: insufficient validation of num_sg when mapping     [rhel-7.0.z])
    - Resolves: bz#1095782       (CVE-2014-0182 qemu-kvm: qemu: virtio: out-of-bounds buffer write on state load with invalid config_len     [rhel-7.0.z])
    - Resolves: bz#1096828       (CVE-2014-3461 qemu-kvm: Qemu: usb: fix up post load checks [rhel-7.0.z])
    - Resolves: bz#1097229       (CVE-2014-0222 qemu-kvm: Qemu: qcow1: validate L2 table size to avoid integer overflows [rhel-7.0.z])
    - Resolves: bz#1097236       (CVE-2014-0223 qemu-kvm: Qemu: qcow1: validate image size to avoid out-of-bounds memory access     [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 these issues but has instead relied only on the application's self-reported version number.

Updated rhev-hypervisor6 packages that fix multiple security issues, several bugs, and add various enhancements are now available.

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.

The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor.

Multiple integer overflow, input validation, logic error, and buffer overflow flaws were discovered in various QEMU block drivers. An attacker able to modify a disk image file loaded by a guest could use these flaws to crash the guest, or corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process. (CVE-2014-0143, CVE-2014-0144, CVE-2014-0145, CVE-2014-0147)

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)

A buffer overflow flaw was found in the way the virtio_net_handle_mac() function of QEMU processed guest requests to update the table of MAC addresses. A privileged guest user could use this flaw to corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process. (CVE-2014-0150)

A divide-by-zero flaw was found in the seek_to_sector() function of the parallels block driver in QEMU. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest.
(CVE-2014-0142)

A NULL pointer dereference flaw was found in the QCOW2 block driver in QEMU. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest. (CVE-2014-0146)

It was found that the block driver for Hyper-V VHDX images did not correctly calculate BAT (Block Allocation Table) entries due to a missing bounds check. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest.
(CVE-2014-0148)

The CVE-2014-0143 issues were discovered by Kevin Wolf and Stefan Hajnoczi of Red Hat, the CVE-2014-0144 issues were discovered by Fam Zheng, Jeff Cody, Kevin Wolf, and Stefan Hajnoczi of Red Hat, the CVE-2014-0145 issues were discovered by Stefan Hajnoczi of Red Hat, the CVE-2014-0150 issue was discovered by Michael S. Tsirkin of Red Hat, the CVE-2014-0142, CVE-2014-0146, and CVE-2014-0147 issues were discovered by Kevin Wolf of Red Hat, the CVE-2014-0148 issue was discovered by Jeff Cody of Red Hat, and 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.

Other changes to the rhev-hypervisor6 component :

* The most recent builds of rhn-virtualization-common and rhn-virtualization-host are included in version 3.4.0. (BZ#1095812)

All users of qemu-kvm-rhev are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements. 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.

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.

Updated qemu-kvm packages that fix multiple security issues and various bugs are now available for Red Hat Enterprise Linux 7.

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.

Two integer overflow flaws were found in the QEMU block driver for QCOW version 1 disk images. A user able to alter the QEMU disk image files loaded by a guest could use either of these flaws 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-2014-0222, CVE-2014-0223)

Multiple buffer overflow, input validation, and out-of-bounds write flaws were found in the way virtio, virtio-net, virtio-scsi, usb, and hpet 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-2013-4149, CVE-2013-4150, CVE-2013-4151, CVE-2013-4527, CVE-2013-4529, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)

These issues were discovered by Michael S. Tsirkin, Anthony Liguori and Michael Roth of Red Hat: CVE-2013-4148, CVE-2013-4149, CVE-2013-4150, CVE-2013-4151, CVE-2013-4527, CVE-2013-4529, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, and CVE-2014-3461.

This update also fixes the following bugs :

* Previously, QEMU did not free pre-allocated zero clusters correctly and the clusters under some circumstances leaked. With this update, pre-allocated zero clusters are freed appropriately and the cluster leaks no longer occur. (BZ#1110188)

* Prior to this update, the QEMU command interface did not properly handle resizing of cache memory during guest migration, causing QEMU to terminate unexpectedly with a segmentation fault and QEMU to fail.
This update fixes the related code and QEMU no longer crashes in the described situation. (BZ#1110191)

* Previously, when a guest device was hot unplugged, QEMU correctly removed the corresponding file descriptor watch but did not re-create it after the device was re-connected. As a consequence, the guest became unable to receive any data from the host over this device. With this update, the file descriptor's watch is re-created and the guest in the above scenario can communicate with the host as expected.
(BZ#1110219)

* Previously, the QEMU migration code did not account for the gaps caused by hot unplugged devices and thus expected more memory to be transferred during migrations. As a consequence, guest migration failed to complete after multiple devices were hot unplugged. In addition, the migration info text displayed erroneous values for the 'remaining ram' item. With this update, QEMU calculates memory after a device has been unplugged correctly, and any subsequent guest migrations proceed as expected. (BZ#1110189)

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.

Updated qemu packages fix security vulnerabilities :

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 (CVE-2013-4544).

Multiple integer overflow, input validation, logic error, and buffer overflow flaws were discovered in various QEMU block drivers. An attacker able to modify a disk image file loaded by a guest could use these flaws to crash the guest, or corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process (CVE-2014-0143, CVE-2014-0144, CVE-2014-0145, CVE-2014-0147).

A buffer overflow flaw was found in the way the virtio_net_handle_mac() function of QEMU processed guest requests to update the table of MAC addresses. A privileged guest user could use this flaw to corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process (CVE-2014-0150).

A divide-by-zero flaw was found in the seek_to_sector() function of the parallels block driver in QEMU. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest (CVE-2014-0142).

A NULL pointer dereference flaw was found in the QCOW2 block driver in QEMU. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest (CVE-2014-0146).

It was found that the block driver for Hyper-V VHDX images did not correctly calculate BAT (Block Allocation Table) entries due to a missing bounds check. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest (CVE-2014-0148).

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).

Two integer overflow flaws were found in the QEMU block driver for QCOW version 1 disk images. A user able to alter the QEMU disk image files loaded by a guest could use either of these flaws 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-2014-0222, CVE-2014-0223).

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 information leak flaw was found in the way QEMU's VGA emulator accessed frame buffer memory for high resolution displays. A privileged guest user could use this flaw to leak memory contents of the host to the guest by setting the display to use a high resolution in the guest (CVE-2014-3615).

When guest sends udp packet with source port and source addr 0, uninitialized socket is picked up when looking for matching and already created udp sockets, and later passed to sosendto() where NULL pointer dereference is hit during so->slirp->vnetwork_mask.s_addr access Only guests using qemu user networking are affected (CVE-2014-3640).

The Advanced Threat Research team at Intel Security reported that guest provided parameter were insufficiently validated in rectangle functions in the vmware-vga driver. A privileged guest user could use this flaw to write into qemu address space on the host, potentially escalating their privileges to those of the qemu host process (CVE-2014-3689).

It was discovered that QEMU incorrectly handled USB xHCI controller live migration. An attacker could possibly use this issue to cause a denial of service, or possibly execute arbitrary code (CVE-2014-5263).

James Spadaro of Cisco reported insufficiently sanitized bits_per_pixel from the client in the QEMU VNC display driver. An attacker having access to the guest's VNC console could use this flaw to crash the guest (CVE-2014-7815).

Additionally qemu-1.6+ requires usbredir-0.6+ for USB redirection support which is also being provided with this advisory.

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
81944	Mandriva Linux Security Advisory : qemu (MDVSA-2015:061)	Nessus	Mandriva Local Security Checks	2015/3/19	2021/1/6	high
218125	Linux Distros Unpatched Vulnerability : CVE-2014-0182	Nessus	Misc.	2025/3/4	2026/1/28	high
74047	Fedora 20 : qemu-1.6.2-5.fc20 (2014-6288)	Nessus	Fedora Local Security Checks	2014/5/19	2021/1/11	high
74457	Oracle Linux 6 : qemu-kvm (ELSA-2014-0743)	Nessus	Oracle Linux Local Security Checks	2014/6/11	2024/10/22	high
76748	Oracle Linux 7 : qemu-kvm (ELSA-2014-0927)	Nessus	Oracle Linux Local Security Checks	2014/7/24	2024/11/1	high
79029	RHEL 6 : rhev-hypervisor6 3.4.0 (RHSA-2014:0674)	Nessus	Red Hat Local Security Checks	2014/11/8	2021/1/14	high
74474	CentOS 6 : qemu-kvm (CESA-2014:0743)	Nessus	CentOS Local Security Checks	2014/6/12	2021/1/4	high
76907	RHEL 7 : qemu-kvm (RHSA-2014:0927)	Nessus	Red Hat Local Security Checks	2014/7/30	2021/1/14	high
79407	Mandriva Linux Security Advisory : qemu (MDVSA-2014:220)	Nessus	Mandriva Local Security Checks	2014/11/23	2021/1/6	high
74461	RHEL 6 : qemu-kvm (RHSA-2014:0743)	Nessus	Red Hat Local Security Checks	2014/6/11	2025/4/15	high

检测

插件搜索

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