Security update for kvm (important)

This update for kvm fixes several issues.

These security issues were fixed:

• CVE-2017-2620: In CIRRUS_BLTMODE_MEMSYSSRC mode the bitblit copy routine
  cirrus_bitblt_cputovideo failed to check the memory region, allowing for
  an out-of-bounds write that allows for privilege escalation (bsc#1024972)
• CVE-2017-2615: An error in the bitblt copy operation could have allowed
  a malicious guest administrator to cause an out of bounds memory access,
  possibly leading to information disclosure or privilege escalation
  (bsc#1023004)
• CVE-2016-9776: The ColdFire Fast Ethernet Controller emulator support
  was vulnerable to an infinite loop issue while receiving packets in
  ‘mcf_fec_receive’. A privileged user/process inside guest could have
  used this issue to crash the Qemu process on the host leading to DoS
  (bsc#1013285)
• CVE-2016-9911: The USB EHCI Emulation support was vulnerable to a memory
  leakage issue while processing packet data in ‘ehci_init_transfer’. A
  guest user/process could have used this issue to leak host memory,
  resulting in DoS for the host (bsc#1014111)
• CVE-2016-9907: The USB redirector usb-guest support was vulnerable to a
  memory leakage flaw when destroying the USB redirector in
  ‘usbredir_handle_destroy’. A guest user/process could have used this
  issue to leak host memory, resulting in DoS for a host (bsc#1014109)
• CVE-2016-9921: The Cirrus CLGD 54xx VGA Emulator support was vulnerable
  to a divide by zero issue while copying VGA data. A privileged user
  inside guest could have used this flaw to crash the process instance on
  the host, resulting in DoS (bsc#1014702)
• CVE-2016-9922: The Cirrus CLGD 54xx VGA Emulator support was vulnerable
  to a divide by zero issue while copying VGA data. A privileged user
  inside guest could have used this flaw to crash the process instance on
  the host, resulting in DoS (bsc#1014702)
• CVE-2017-5898: The CCID Card device emulator support was vulnerable to
  an integer overflow allowing a privileged user inside the guest to crash
  the Qemu process resulting in DoS (bnc#1023907)
• CVE-2016-10155: The virtual hardware watchdog ‘wdt_i6300esb’ was
  vulnerable to a memory leakage issue allowing a privileged user to cause
  a DoS and/or potentially crash the Qemu process on the host (bsc#1021129)
• CVE-2017-5856: The MegaRAID SAS 8708EM2 Host Bus Adapter emulation
  support was vulnerable to a memory leakage issue allowing a privileged
  user to leak host memory resulting in DoS (bsc#1023053)
• CVE-2016-9602: The VirtFS host directory sharing via Plan 9 File
  System(9pfs) support was vulnerable to an improper link following issue
  which allowed a privileged user inside guest to access host file system
  beyond the shared folder and potentially escalating their privileges on
  a host (bsc#1020427)
• CVE-2016-9603: A privileged user within the guest VM could have caused a
  heap overflow in the device model process, potentially escalating their
  privileges to that of the device model process (bsc#1028656)
• CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which allowed remote
  attackers to cause a denial of service (daemon crash) by disconnecting
  during a server-to-client reply attempt (bsc#1046636)
• CVE-2017-10806: Stack-based buffer overflow allowed local guest OS users
  to cause a denial of service (QEMU process crash) via vectors related to
  logging debug messages (bsc#1047674)
• CVE-2017-11334: The address_space_write_continue function allowed local
  guest OS privileged users to cause a denial of service (out-of-bounds
  access and guest instance crash) by leveraging use of qemu_map_ram_ptr
  to access guest ram block area (bsc#1048902)
• CVE-2017-11434: The dhcp_decode function in slirp/bootp.c allowed local
  guest OS users to cause a denial of service (out-of-bounds read) via a
  crafted DHCP options string (bsc#1049381)
• CVE-2017-13672: The VGA display emulator support allowed local guest OS
  privileged users to cause a denial of service (out-of-bounds read and
  QEMU process crash) via vectors involving display update (bsc#1056334)
• CVE-2017-14167: Integer overflow in the load_multiboot function allowed
  local guest OS users to execute arbitrary code on the host via crafted
  multiboot header address values, which trigger an out-of-bounds write
  (bsc#1057585)
• CVE-2017-15038: Race condition in the v9fs_xattrwalk function local
  guest OS users to obtain sensitive information from host heap memory via
  vectors related to reading extended attributes (bsc#1062069)
• CVE-2017-15289: The mode4and5 write functions allowed local OS guest
  privileged users to cause a denial of service (out-of-bounds write
  access and Qemu process crash) via vectors related to dst calculation
  (bsc#1063122)
• CVE-2017-5579: The 16550A UART serial device emulation support was
  vulnerable to a memory leakage issue allowing a privileged user to cause
  a DoS and/or potentially crash the Qemu process on the host (bsc#1021741)
• CVE-2017-5973: A infinite loop while doing control transfer in
  xhci_kick_epctx allowed privileged user inside the guest to crash the
  host process resulting in DoS (bsc#1025109)
• CVE-2017-6505: The ohci_service_ed_list function allowed local guest OS
  users to cause a denial of service (infinite loop) via vectors involving
  the number of link endpoint list descriptors (bsc#1028184)
• CVE-2017-7471: The VirtFS host directory sharing via Plan 9 File
  System(9pfs) support was vulnerable to an improper access control issue
  which allowed a privileged user inside guest to access host file system
  beyond the shared folder and potentially escalating their privileges on
  a host (bsc#1034866)
• CVE-2017-7493: The VirtFS, host directory sharing via Plan 9 File
  System(9pfs) support, was vulnerable to an improper access control
  issue. It could occur while accessing virtfs metadata files in
  mapped-file security mode. A guest user could have used this flaw to
  escalate their privileges inside guest (bsc#1039495)
• CVE-2017-7718: hw/display/cirrus_vga_rop.h allowed local guest OS
  privileged users to cause a denial of service (out-of-bounds read and
  QEMU process crash) via vectors related to copying VGA data via the
  cirrus_bitblt_rop_fwd_transp_ and cirrus_bitblt_rop_fwd_ functions
  (bsc#1034908)
• CVE-2017-7980: An out-of-bounds r/w access issues in the Cirrus CLGD
  54xx VGA Emulator support allowed privileged user inside guest to use
  this flaw to crash the Qemu process resulting in DoS or potentially
  execute arbitrary code on a host with privileges of Qemu process on the
  host (bsc#1035406)
• CVE-2017-8086: A memory leak in the v9fs_list_xattr function in
  hw/9pfs/9p-xattr.c allowed local guest OS privileged users to cause a
  denial of service (memory consumption) via vectors involving the
  orig_value variable (bsc#1035950)
• CVE-2017-8309: Memory leak in the audio/audio.c allowed remote attackers
  to cause a denial of service (memory consumption) by repeatedly starting
  and stopping audio capture (bsc#1037242)
• CVE-2017-9330: USB OHCI Emulation in qemu allowed local guest OS users
  to cause a denial of service (infinite loop) by leveraging an incorrect
  return value (bsc#1042159)
• CVE-2017-9373: The IDE AHCI Emulation support was vulnerable to a host
  memory leakage issue, which allowed a privileged user inside guest to
  leak host memory resulting in DoS (bsc#1042801)
• CVE-2017-9375: The USB xHCI controller emulator support was vulnerable
  to an infinite recursive call loop issue, which allowed a privileged
  user inside guest to crash the Qemu process resulting in DoS
  (bsc#1042800)
• CVE-2017-9503: The MegaRAID SAS 8708EM2 Host Bus Adapter emulation
  support was vulnerable to a null pointer dereference issue which allowed
  a privileged user inside guest to crash the Qemu process on the host
  resulting in DoS (bsc#1043296)

• Fix privilege escalation in TCG mode (bsc#1030624)

These non-security issues were fixed:

• bsc#1045035: Fixed regression introduced by previous virtfs security
  fixes
• bsc#1038396: Fixed 12 tempest tests
• bsc#1034044: Prevent KVM guests stuck when waiting for sg_io() completion
• bsc#1031051: Prevent I/O errors when using pvmove with disk device=lun
• bsc#1049785: Make virsh dump output readable by crash
• bsc#1015048: Fixed virtio interface failure
• bsc#1016779: Fixed graphical update errors introduced by previous
  security fix
• Fixed various inaccuracies in cirrus vga device emulation