CVE-2016-4952

QEMU (aka Quick Emulator), when built with VMWARE PVSCSI paravirtual SCSI bus emulation support, allows local guest OS administrators to cause a denial of service (out-of-bounds array access) via vectors related to the (1) PVSCSI_CMD_SETUP_RINGS or (2) PVSCSI_CMD_SETUP_MSG_RING SCSI command.

These are all security issues fixed in the qemu-2.6.1-1.5 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the qemu-linux-user-2.6.1-1.5 package on the GA media of openSUSE Tumbleweed.

qemu was updated to fix 37 security issues.

These security issues were fixed:

• CVE-2016-4439: Avoid OOB access in 53C9X emulation (bsc#980711)
• CVE-2016-4441: Avoid OOB access in 53C9X emulation (bsc#980723)
• CVE-2016-4952: Avoid OOB access in Vmware PV SCSI emulation (bsc#981266)
• CVE-2015-8817: Avoid OOB access in PCI DMA I/O (bsc#969121)
• CVE-2015-8818: Avoid OOB access in PCI DMA I/O (bsc#969122)
• CVE-2016-3710: Fixed VGA emulation based OOB access with potential for guest escape (bsc#978158)
• CVE-2016-3712: Fixed VGa emulation based DOS and OOB read access exploit (bsc#978160)
• CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)
• CVE-2016-2538: Fixed potential OOB access in USB net device emulation (bsc#967969)
• CVE-2016-2841: Fixed OOB access / hang in ne2000 emulation (bsc#969350)
• CVE-2016-2858: Avoid potential DOS when using QEMU pseudo random number generator (bsc#970036)
• CVE-2016-2857: Fixed OOB access when processing IP checksums (bsc#970037)
• CVE-2016-4001: Fixed OOB access in Stellaris enet emulated nic (bsc#975128)
• CVE-2016-4002: Fixed OOB access in MIPSnet emulated controller (bsc#975136)
• CVE-2016-4020: Fixed possible host data leakage to guest from TPR access (bsc#975700)
• CVE-2015-3214: Fixed OOB read in i8254 PIC (bsc#934069)
• CVE-2014-9718: Fixed the handling of malformed or short ide PRDTs to avoid any opportunity for guest to cause DoS by abusing that interface (bsc#928393)
• CVE-2014-3689: Fixed insufficient parameter validation in rectangle functions (bsc#901508)
• CVE-2014-3615: The VGA emulator in QEMU allowed local guest users to read host memory by setting the display to a high resolution (bsc#895528).
• CVE-2015-5239: Integer overflow in vnc_client_read() and protocol_client_msg() (bsc#944463).
• CVE-2015-5745: Buffer overflow in virtio-serial (bsc#940929).
• CVE-2015-7295: hw/virtio/virtio.c in the Virtual Network Device (virtio-net) support in QEMU, when big or mergeable receive buffers are not supported, allowed remote attackers to cause a denial of service (guest network consumption) via a flood of jumbo frames on the (1) tuntap or (2) macvtap interface (bsc#947159).
• CVE-2015-7549: PCI null pointer dereferences (bsc#958917).
• CVE-2015-8504: VNC floating point exception (bsc#958491).
• CVE-2015-8558: Infinite loop in ehci_advance_state resulting in DoS (bsc#959005).
• CVE-2015-8567: A guest repeatedly activating a vmxnet3 device can leak host memory (bsc#959386).
• CVE-2015-8568: A guest repeatedly activating a vmxnet3 device can leak host memory (bsc#959386).
• CVE-2015-8613: Wrong sized memset in megasas command handler (bsc#961358).
• CVE-2015-8619: Potential DoS for long HMP sendkey command argument (bsc#960334).
• CVE-2015-8743: OOB memory access in ne2000 ioport r/w functions (bsc#960725).
• CVE-2015-8744: Incorrect l2 header validation could have lead to a crash via assert(2) call (bsc#960835).
• CVE-2015-8745: Reading IMR registers could have lead to a crash via assert(2) call (bsc#960708).
• CVE-2016-1568: AHCI use-after-free in aio port commands (bsc#961332).
• CVE-2016-1714: Potential OOB memory access in processing firmware configuration (bsc#961691).
• CVE-2016-1922: NULL pointer dereference when processing hmp i/o command (bsc#962320).
• CVE-2016-1981: Potential DoS (infinite loop) in e1000 device emulation by malicious privileged user within guest (bsc#963782).
• CVE-2016-2198: Malicious privileged guest user were able to cause DoS by writing to read-only EHCI capabilities registers (bsc#964413).

This non-security issue was fixed

• bsc#886378: qemu truncates vhd images in virt-rescue

qemu was updated to fix 29 security issues.

These security issues were fixed:

• CVE-2016-4439: Avoid OOB access in 53C9X emulation (bsc#980711)
• CVE-2016-4441: Avoid OOB access in 53C9X emulation (bsc#980723)
• CVE-2016-4952: Avoid OOB access in Vmware PV SCSI emulation (bsc#981266)
• CVE-2015-8817: Avoid OOB access in PCI dma I/O (bsc#969121)
• CVE-2015-8818: Avoid OOB access in PCI dma I/O (bsc#969122)
• CVE-2016-3710: Fixed VGA emulation based OOB access with potential for guest escape (bsc#978158)
• CVE-2016-3712: Fixed VGa emulation based DOS and OOB read access exploit (bsc#978160)
• CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)
• CVE-2016-2538: Fixed potential OOB access in USB net device emulation (bsc#967969)
• CVE-2016-2841: Fixed OOB access / hang in ne2000 emulation (bsc#969350)
• CVE-2016-2858: Avoid potential DOS when using QEMU pseudo random number generator (bsc#970036)
• CVE-2016-2857: Fixed OOB access when processing IP checksums (bsc#970037)
• CVE-2016-4001: Fixed OOB access in Stellaris enet emulated nic (bsc#975128)
• CVE-2016-4002: Fixed OOB access in MIPSnet emulated controller (bsc#975136)
• CVE-2016-4020: Fixed possible host data leakage to guest from TPR access (bsc#975700)
• CVE-2016-2197: Prevent AHCI NULL pointer dereference when using FIS CLB engine (bsc#964411)
• CVE-2015-5745: Buffer overflow in virtio-serial (bsc#940929).
• CVE-2015-7549: PCI null pointer dereferences (bsc#958917).
• CVE-2015-8504: VNC floating point exception (bsc#958491).
• CVE-2015-8558: Infinite loop in ehci_advance_state resulting in DoS (bsc#959005).
• CVE-2015-8567: A guest repeatedly activating a vmxnet3 device can leak host memory (bsc#959386).
• CVE-2015-8568: A guest repeatedly activating a vmxnet3 device can leak host memory (bsc#959386).
• CVE-2015-8613: Wrong sized memset in megasas command handler (bsc#961358).
• CVE-2015-8619: Potential DoS for long HMP sendkey command argument (bsc#960334).
• CVE-2015-8743: OOB memory access in ne2000 ioport r/w functions (bsc#960725).
• CVE-2015-8744: Incorrect l2 header validation could have lead to a crash via assert(2) call (bsc#960835).
• CVE-2015-8745: Reading IMR registers could have lead to a crash via assert(2) call (bsc#960708).
• CVE-2016-1568: AHCI use-after-free in aio port commands (bsc#961332).
• CVE-2016-1714: Potential OOB memory access in processing firmware configuration (bsc#961691).
• CVE-2016-1922: NULL pointer dereference when processing hmp i/o command (bsc#962320).
• CVE-2016-1981: Potential DoS (infinite loop) in e1000 device emulation by malicious privileged user within guest (bsc#963782).
• CVE-2016-2198: Malicious privileged guest user were able to cause DoS by writing to read-only EHCI capabilities registers (bsc#964413).

This non-security issue was fixed

• bsc#886378: qemu truncates vhd images in virt-rescue

This update for xen to version 4.5.3 fixes the several issues.

These security issues were fixed:

• CVE-2016-6258: Potential privilege escalation in PV guests (XSA-182) (bsc#988675).
• CVE-2016-6259: Missing SMAP whitelisting in 32-bit exception / event delivery (XSA-183) (bsc#988676).
• CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973).
• CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984).
• CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960).
• CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225).
• CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224).
• CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286).
• CVE-2016-5105: Stack information leakage while reading configuration (bsc#982024).
• CVE-2016-5106: Out-of-bounds write while setting controller properties (bsc#982025).
• CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function (bsc#982026).
• CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670).
• CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620).
• CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276).
• CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264).
• CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724).
• CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716).
• CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164).
• CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038).
• CVE-2016-3159: The fpu_fxrstor function…

This update for xen fixes the several issues.

These security issues were fixed:

• CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264).
• CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).
• CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).
• CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164).
• CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038).
• CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130).
• CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138).
• CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907).
• CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111).
• CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716).
• CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724).
• CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225).
• CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224).
• CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276).
• CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620).
• CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the…

This update for xen fixes several issues.

These security issues were fixed:

• CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264).
• CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).
• CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188).
• CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164)
• CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038).
• CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130).
• CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138).
• CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907)
• CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111)
• CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716)
• CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724)
• CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225)
• CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224)
• CVE-2016-4480: The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might have allowed local guest OS users to gain privileges via a crafted mapping of memory (bsc#978295).
• CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276)
• CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to…

Li Qiang discovered that QEMU incorrectly handled 53C9X Fast SCSI controller emulation. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-4439, CVE-2016-4441, CVE-2016-5238, CVE-2016-5338, CVE-2016-6351)

Li Qiang and Qinghao Tang discovered that QEMU incorrectly handled the VMWare VGA module. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly to obtain sensitive host memory. (CVE-2016-4453, CVE-2016-4454)

Li Qiang discovered that QEMU incorrectly handled VMWARE PVSCSI paravirtual SCSI bus emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-4952)

Li Qiang discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2 Host Bus Adapter emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly to obtain sensitive host memory. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-5105, CVE-2016-5106, CVE-2016-5107, CVE-2016-5337)

It was discovered that QEMU incorrectly handled certain iSCSI asynchronous I/O ioctl calls. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-5126)

Zhenhao Hong discovered that QEMU incorrectly handled the Virtio module. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-5403)