SUSE SLES12 Security Update : xen (SUSE-SU-2016:2533-1) (Bunker Buster)

This script is Copyright (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote SUSE host is missing one or more security updates.

Description :

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 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 driver domain to cause
a denial of service (management tool confusion) by
manipulating information in the backend directories in
xenstore (bsc#979670)

- 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-2016-5126: 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-2016-5238: 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-2016-5337: 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-2016-5403: virtio: unbounded memory allocation on
host via guest leading to DoS (XSA-184) (bsc#990923)

- CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in
Xen allowed local 32-bit PV guest OS administrators to
gain host OS privileges by leveraging fast-paths for
updating pagetable entries (bsc#988675)

- CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c,
when built with ESP/NCR53C9x controller emulation
support, allowed local guest OS administrators to cause
a denial of service (out-of-bounds write and QEMU
process crash) or execute arbitrary code on the host via
vectors involving DMA read into ESP command buffer
(bsc#990843).

- CVE-2016-6833: A use-after-free issue in the VMWARE
VMXNET3 NIC device support allowed privileged user
inside guest to crash the Qemu instance resulting in DoS
(bsc#994775).

- CVE-2016-6834: A infinite loop during packet
fragmentation in the VMWARE VMXNET3 NIC device support
allowed privileged user inside guest to crash the Qemu
instance resulting in DoS (bsc#994421).

- CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC
device support, causing an OOB read access (bsc#994625).

- CVE-2016-6836: VMWARE VMXNET3 NIC device allowed
privileged user inside the guest to leak information. It
occured while processing transmit(tx) queue, when it
reaches the end of packet (bsc#994761).

- CVE-2016-6888: A integer overflow int the VMWARE VMXNET3
NIC device support, during the initialisation of new
packets in the device, could have allowed a privileged
user inside guest to crash the Qemu instance resulting
in DoS (bsc#994772).

- CVE-2016-7092: The get_page_from_l3e function in
arch/x86/mm.c in Xen allowed local 32-bit PV guest OS
administrators to gain host OS privileges via vectors
related to L3 recursive pagetables (bsc#995785)

- CVE-2016-7093: Xen allowed local HVM guest OS
administrators to overwrite hypervisor memory and
consequently gain host OS privileges by leveraging
mishandling of instruction pointer truncation during
emulation (bsc#995789)

- CVE-2016-7094: Buffer overflow in Xen allowed local x86
HVM guest OS administrators on guests running with
shadow paging to cause a denial of service via a
pagetable update (bsc#995792)

- CVE-2016-7154: Use-after-free vulnerability in the FIFO
event channel code in Xen allowed local guest OS
administrators to cause a denial of service (host crash)
and possibly execute arbitrary code or obtain sensitive
information via an invalid guest frame number
(bsc#997731). These non-security issues were fixed :

- bsc#991934: Hypervisor crash in csched_acct

- bsc#992224: During boot of Xen Hypervisor, failed to get
contiguous memory for DMA

- bsc#970135: New virtualization project clock test
randomly fails on Xen

- bsc#971949: xl: Support (by ignoring) xl migrate --live.
xl migrations are always live

- bsc#990970: Add PMU support for Intel E7-8867 v4 (fam=6,
model=79)

- bsc#985503: vif-route broken

- bsc#978413: PV guest upgrade from sles11sp4 to sles12sp2
alpha3 failed on sles11sp4 xen host.

- bsc#986586: Out of memory (oom) during boot on 'modprobe
xenblk' (non xen kernel)

- bsc#953339, bsc#953362, bsc#953518, bsc#984981:
Implement SUSE specific unplug protocol for emulated PCI
devices in PVonHVM guests to qemu-xen-upstream

- bsc#958848: HVM guest crash at /usr/src/packages/BUILD/
xen-4.4.2-testing/obj/default/balloon/balloon.c:407

- bsc#982695: xen-4.5.2 qemu fails to boot HVM guest from
xvda

- bsc#954872: script block-dmmd not working as expected

- bsc#961600: : poor performance when Xen HVM domU
configured with max memory > current memory

- bsc#979035: Restore xm migrate fixes for bsc#955399/
bsc#955399

- bsc#963161: Windows VM getting stuck during load while a
VF is assigned to it

- bsc#976058: Xen error running simple HVM guest (Post
Alpha 2 xen+qemu)

- bsc#957986: Indirect descriptors are not compatible with
Amazon block backend

- bsc#973631: AWS EC2 kdump issue

- bsc#964427: Discarding device blocks failed with
input/output error

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

See also :

https://bugzilla.suse.com/953339
https://bugzilla.suse.com/953362
https://bugzilla.suse.com/953518
https://bugzilla.suse.com/954872
https://bugzilla.suse.com/955399
https://bugzilla.suse.com/957986
https://bugzilla.suse.com/958848
https://bugzilla.suse.com/961600
https://bugzilla.suse.com/963161
https://bugzilla.suse.com/964427
https://bugzilla.suse.com/970135
https://bugzilla.suse.com/971949
https://bugzilla.suse.com/973188
https://bugzilla.suse.com/973631
https://bugzilla.suse.com/974038
https://bugzilla.suse.com/975130
https://bugzilla.suse.com/975138
https://bugzilla.suse.com/975907
https://bugzilla.suse.com/976058
https://bugzilla.suse.com/976111
https://bugzilla.suse.com/978164
https://bugzilla.suse.com/978295
https://bugzilla.suse.com/978413
https://bugzilla.suse.com/979035
https://bugzilla.suse.com/979620
https://bugzilla.suse.com/979670
https://bugzilla.suse.com/980716
https://bugzilla.suse.com/980724
https://bugzilla.suse.com/981264
https://bugzilla.suse.com/981276
https://bugzilla.suse.com/982024
https://bugzilla.suse.com/982025
https://bugzilla.suse.com/982026
https://bugzilla.suse.com/982224
https://bugzilla.suse.com/982225
https://bugzilla.suse.com/982286
https://bugzilla.suse.com/982695
https://bugzilla.suse.com/982960
https://bugzilla.suse.com/983973
https://bugzilla.suse.com/983984
https://bugzilla.suse.com/984981
https://bugzilla.suse.com/985503
https://bugzilla.suse.com/986586
https://bugzilla.suse.com/988675
https://bugzilla.suse.com/990843
https://bugzilla.suse.com/990923
https://bugzilla.suse.com/990970
https://bugzilla.suse.com/991934
https://bugzilla.suse.com/992224
https://bugzilla.suse.com/994421
https://bugzilla.suse.com/994625
https://bugzilla.suse.com/994761
https://bugzilla.suse.com/994772
https://bugzilla.suse.com/994775
https://bugzilla.suse.com/995785
https://bugzilla.suse.com/995789
https://bugzilla.suse.com/995792
https://bugzilla.suse.com/997731
https://www.suse.com/security/cve/CVE-2014-3615.html
https://www.suse.com/security/cve/CVE-2014-3672.html
https://www.suse.com/security/cve/CVE-2016-3158.html
https://www.suse.com/security/cve/CVE-2016-3159.html
https://www.suse.com/security/cve/CVE-2016-3710.html
https://www.suse.com/security/cve/CVE-2016-3712.html
https://www.suse.com/security/cve/CVE-2016-3960.html
https://www.suse.com/security/cve/CVE-2016-4001.html
https://www.suse.com/security/cve/CVE-2016-4002.html
https://www.suse.com/security/cve/CVE-2016-4020.html
https://www.suse.com/security/cve/CVE-2016-4037.html
https://www.suse.com/security/cve/CVE-2016-4439.html
https://www.suse.com/security/cve/CVE-2016-4441.html
https://www.suse.com/security/cve/CVE-2016-4453.html
https://www.suse.com/security/cve/CVE-2016-4454.html
https://www.suse.com/security/cve/CVE-2016-4480.html
https://www.suse.com/security/cve/CVE-2016-4952.html
https://www.suse.com/security/cve/CVE-2016-4962.html
https://www.suse.com/security/cve/CVE-2016-4963.html
https://www.suse.com/security/cve/CVE-2016-5105.html
https://www.suse.com/security/cve/CVE-2016-5106.html
https://www.suse.com/security/cve/CVE-2016-5107.html
https://www.suse.com/security/cve/CVE-2016-5126.html
https://www.suse.com/security/cve/CVE-2016-5238.html
https://www.suse.com/security/cve/CVE-2016-5337.html
https://www.suse.com/security/cve/CVE-2016-5338.html
https://www.suse.com/security/cve/CVE-2016-5403.html
https://www.suse.com/security/cve/CVE-2016-6258.html
https://www.suse.com/security/cve/CVE-2016-6351.html
https://www.suse.com/security/cve/CVE-2016-6833.html
https://www.suse.com/security/cve/CVE-2016-6834.html
https://www.suse.com/security/cve/CVE-2016-6835.html
https://www.suse.com/security/cve/CVE-2016-6836.html
https://www.suse.com/security/cve/CVE-2016-6888.html
https://www.suse.com/security/cve/CVE-2016-7092.html
https://www.suse.com/security/cve/CVE-2016-7093.html
https://www.suse.com/security/cve/CVE-2016-7094.html
https://www.suse.com/security/cve/CVE-2016-7154.html
http://www.nessus.org/u?256ed468

Solution :

To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server for SAP 12:zypper in -t patch
SUSE-SLE-SAP-12-2016-1476=1

SUSE Linux Enterprise Server 12-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-2016-1476=1

To bring your system up-to-date, use 'zypper patch'.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false