This update for kvm fixes several issues.
These security issues were fixed:
- 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)
- Privilege escalation in TCG mode (bsc#1030624)
These non-security issues were fixed:
- bsc#1038396: Fixed 12 tempest tests
- bsc#1045035: Fixed regression introduced by previous virtfs security
fixes
- 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