CVE-2015-5154

Matt Tait discovered that QEMU incorrectly handled the virtual PCNET driver. A malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process (CVE-2015-3209).

Kurt Seifried discovered that QEMU incorrectly handled certain temporary files. A local attacker could use this issue to cause a denial of service (CVE-2015-4037).

Jan Beulich discovered that the QEMU Xen code incorrectly restricted write access to the host MSI message data field. A malicious guest could use this issue to cause a denial of service (CVE-2015-4103).

Jan Beulich discovered that the QEMU Xen code incorrectly restricted access to the PCI MSI mask bits. A malicious guest could use this issue to cause a denial of service (CVE-2015-4104).

Jan Beulich discovered that the QEMU Xen code incorrectly handled MSI-X error messages. A malicious guest could use this issue to cause a denial of service (CVE-2015-4105).

Jan Beulich discovered that the QEMU Xen code incorrectly restricted write access to the PCI config space. A malicious guest could use this issue to cause a denial of service, obtain sensitive information, or possibly execute arbitrary code (CVE-2015-4106).

A heap buffer overflow flaw was found in the way QEMU's IDE subsystem handled I/O buffer access while processing certain ATAPI commands. A privileged guest user in a guest with the CDROM drive enabled could potentially use this flaw to execute arbitrary code on the host with the privileges of the host's QEMU process corresponding to the guest (CVE-2015-5154).

An out-of-bounds memory access flaw, leading to memory corruption or possibly an information leak, was found in QEMU's pit_ioport_read() function. A privileged guest user in a QEMU guest, which had QEMU PIT emulation enabled, could potentially, in rare cases, use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process (CVE-2015-3214).

Qemu emulator built with the virtio-serial vmchannel support is vulnerable to a buffer overflow issue. It could occur while exchanging virtio control messages between guest & the host. A malicious guest could use this flaw to corrupt few bytes of Qemu memory area, potentially crashing the Qemu process (CVE-2015-5745).

This xen update is based on upstream 4.5.2 maintenance release, and fixes the following security issues:

The vgic_v2_to_sgi function in arch/arm/vgic-v2.c in Xen 4.5.x, when running on ARM hardware with general interrupt controller (GIC) version 2, allows local guest users to cause a denial of service (host crash) by writing an invalid value to the GICD.SGIR register (CVE-2015-0268).

The ARM GIC distributor virtualization in Xen 4.4.x and 4.5.x allows local guests to cause a denial of service by causing a large number messages to be logged (CVE-2015-1563).

The emulation routines for unspecified X86 devices in Xen 3.2.x through 4.5.x does not properly initialize data, which allow local HVM guest users to obtain sensitive information via vectors involving an unsupported access size (CVE-2015-2044).

The HYPERVISOR_xen_version hypercall in Xen 3.2.x through 4.5.x does not properly initialize data structures, which allows local guest users to obtain sensitive information via unspecified vectors (CVE-2015-2045).

Xen 3.3.x through 4.5.x and the Linux kernel through 3.19.1 do not properly restrict access to PCI command registers, which might allow local guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response (CVE-2015-2150).

The x86 emulator in Xen 3.2.x through 4.5.x does not properly ignore segment overrides for instructions with register operands, which allows local guest users to obtain sensitive information, cause a denial of service (memory corruption), or possibly execute arbitrary code via unspecified vectors (CVE-2015-2151).

Xen 4.5.x and earlier enables certain default backends when emulating a VGA device for an x86 HVM guest qemu even when the configuration disables them, which allows local guest users to obtain access to the VGA console by (1) setting the DISPLAY environment variable, when compiled with SDL support, or connecting to the VNC server on (2) ::1 or (3) 127.0.0.1, when not compiled with SDL support (CVE-2015-2152).

Xen 4.3.x, 4.4.x, and 4.5.x, when using toolstack disaggregation, allows remote domains with partial management control to cause a denial of service (host lock) via unspecified domctl operations (CVE-2015-2751).

The XEN_DOMCTL_memory_mapping hypercall in Xen 3.2.x through 4.5.x, when using a PCI passthrough device, is not preemptable, which allows local x86 HVM domain users to cause a denial of service (host CPU consumption) via a crafted request to the device model (qemu-dm) (CVE-2015-2752).

QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response (CVE-2015-2756).

Heap-based buffer overflow in the PCNET controller in QEMU allows remote attackers to execute arbitrary code by sending a packet with TXSTATUS_STARTPACKET set and then a crafted packet with TXSTATUS_DEVICEOWNS set (CVE-2015-3209).

Stack-based buffer overflow in the xl command line utility in Xen 4.1.x through 4.5.x allows local guest administrators to gain privileges via a long configuration argument (CVE-2015-3259).

Xen 4.2.x through 4.5.x does not initialize certain fields, which allows certain remote service domains to obtain sensitive information from memory via a (1) XEN_DOMCTL_gettscinfo or (2) XEN_SYSCTL_getdomaininfolist request (CVE-2015-3340).

The Floppy Disk Controller (FDC) in QEMU, as used in Xen 4.5.x and earlier and KVM, allows local guest users to cause a denial of service (out-of-bounds write and guest crash) or possibly execute arbitrary code via the (1) FD_CMD_READ_ID, (2) FD_CMD_DRIVE_SPECIFICATION_COMMAND, or other…

These are all security issues fixed in the xen-4.7.0_12-1.3 package on the GA media of openSUSE Tumbleweed.

xen was updated to fix two security issues.

These security issues were fixed:

• CVE-2015-3259: xl command line config handling stack overflow (bsc#935634, XSA-137).
• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344).

This non-security issue was fixed:

• Kdump did not work in a XEN environment (bsc#925466).

xen was updated to fix two security issues.

These security issues were fixed:

• CVE-2015-3259: xl command line config handling stack overflow (bsc#935634, XSA-137).
• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344).

These non-security issues were fixed:

• Restart of xencommons service did lead to loss of xenstore data (bsc#935256).
• Kdump did not work in a XEN environment (bsc#925466).

This security update of Xen fixes the following issues:

• bsc#939712 (XSA-140): QEMU leak of uninitialized heap memory in rtl8139 device model (CVE-2015-5165)
• bsc#938344: qemu,kvm,xen: host code execution via IDE subsystem CD-ROM (CVE-2015-5154)

kvm was updated to fix one security issue.

This security issue was fixed:

• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344).

Xen was updated to fix the following security issues:

• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344)
• CVE-2015-5165: QEMU leak of uninitialized heap memory in rtl8139 device model (XSA-140, bsc#939712)

kvm was updated to fix two security issues.

The following vulnerabilities were fixed:

• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344).
• CVE-2015-3209: Fix buffer overflow in pcnet emulation (bsc#932770).

kvm was updated to fix one security issue.

This security issue was fixed:

• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344).

kvm was updated to fix one security issue.

This security issue was fixed:

• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344).

xen was updated to fix the following security issues:

• CVE-2015-5165: QEMU leak of uninitialized heap memory in rtl8139 device model (bsc#939712, XSA-140)
• CVE-2015-5166: Use after free in QEMU/Xen block unplug protocol (bsc#939709, XSA-139)
• CVE-2015-2751: Certain domctl operations could have be used to lock up the host (bsc#922709, XSA-127)
• CVE-2015-3259: xl command line config handling stack overflow (bsc#935634, XSA-137)
• CVE-2015-4164: DoS through iret hypercall handler (bsc#932996, XSA-136)
• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344)

xen was updated to fix the following security issues:

• CVE-2015-5165: QEMU leak of uninitialized heap memory in rtl8139 device model (bsc#939712, XSA-140)
• CVE-2015-5166: Use after free in QEMU/Xen block unplug protocol (bsc#939709, XSA-139)
• CVE-2015-2751: Certain domctl operations could have be used to lock up the host (bsc#922709, XSA-127)
• CVE-2015-3259: xl command line config handling stack overflow (bsc#935634, XSA-137)
• CVE-2015-4164: DoS through iret hypercall handler (bsc#932996, XSA-136)
• CVE-2015-5154: Host code execution via IDE subsystem CD-ROM (bsc#938344)

qemu was updated to fix several security issues and bugs.

The following vulnerabilities were fixed:

• CVE-2015-5154: Heap-based buffer overflow in the IDE subsystem in QEMU, when the container has a CDROM drive enabled, allows local guest users to execute arbitrary code on the host via unspecified ATAPI commands. (bsc#938344).
• CVE-2015-5278: QEMU was vulnerable to an infinite loop issue that could occur when receiving packets over the network. (bsc#945989)
• CVE-2015-5279: QEMU was vulnerable to a heap buffer overflow issue that could occur when receiving packets over the network. (bsc#945987)
• CVE-2015-6855: QEMU was vulnerable to a divide by zero issue that could occur while executing an IDE command WIN_READ_NATIVE_MAX to determine the maximum size of a drive. (bsc#945404)
• CVE-2014-7815: The set_pixel_format function in ui/vnc.c in QEMU allowed remote attackers to cause a denial of service (crash) via a small bytes_per_pixel value. (bsc#902737):

Also these non-security issues were fixed:

• bsc#937572: Fixed dictzip on big endian systems
• bsc#934517: Fix 'info tlb' causes guest to freeze
• bsc#934506: Fix vte monitor consol looks empy
• bsc#937125: Fix parsing of scsi-disk wwn uint64 property
• bsc#945778: Drop .probe hooks for DictZip and tar block drivers
• bsc#937572: Fold common-obj-y -> block-obj-y change into original patches
• bsc#928308,bsc#944017: Fix virtio-ccw index errors when initrd gets too large
• bsc#936537: Fix possible qemu-img error when converting to compressed qcow2 image
• bsc#939216: Fix reboot fail after install using uefi
• bsc#943446: qemu-img convert doesn't create MB aligned VHDs anymore

This update fixes the following security issues:

• bsc#956832 - CVE-2015-8345: xen: qemu: net: eepro100: infinite loop in processing command block list

• Revert x86/IO-APIC: don't create pIRQ mapping from masked RTE until kernel maintenance release goes out.

• bsc#956592 - xen: virtual PMU is unsupported (XSA-163)

• bsc#956408 - CVE-2015-8339, CVE-2015-8340: xen: XENMEM_exchange error handling issues (XSA-159)

• bsc#956409 - CVE-2015-8341: xen: libxl leak of pv kernel and initrd on error (XSA-160)

• bsc#956411 - CVE-2015-7504: xen: heap buffer overflow vulnerability in pcnet emulator (XSA-162)

• bsc#947165 - CVE-2015-7311: xen: libxl fails to honour readonly flag on disks with qemu-xen (xsa-142)

• bsc#954405 - CVE-2015-8104: Xen: guest to host DoS by triggering an infinite loop in microcode via #DB exception

• bsc#954018 - CVE-2015-5307: xen: x86: CPU lockup during fault delivery (XSA-156)

Heap-based buffer overflow in the IDE subsystem in QEMU, as used in Xen 4.5.x and earlier, when the container has a CDROM drive enabled, allows local guest users to execute arbitrary code on the host via unspecified ATAPI commands.

Matt Tait discovered that QEMU incorrectly handled PIT emulation. In a non-default configuration, a malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2015-3214)

Kevin Wolf discovered that QEMU incorrectly handled processing ATAPI commands. A malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2015-5154)

Zhu Donghai discovered that QEMU incorrectly handled the SCSI driver. A malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. This issue only affected Ubuntu 15.04. (CVE-2015-5158)