===========================================================================
Ubuntu Security Notice USN-3414-2
September 20, 2017

qemu regression
===========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

USN-3414-1 introduced a regression in QEMU.

Software Description:
- qemu: Machine emulator and virtualizer

Details:

USN-3414-1 fixed vulnerabilities in QEMU. The patch backport for
CVE-2017-9375 was incomplete and caused a regression in the USB xHCI
controller emulation support. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control.
 A guest attacker could use this issue to elevate privileges inside the
 guest. (CVE-2017-7493)
  Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation.
 A privileged attacker inside the guest could use this issue to cause QEMU
 to consume resources or crash, resulting in a denial of service.
 (CVE-2017-8112)
  It was 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 affected Ubuntu
 16.04 LTS and Ubuntu 17.04. (CVE-2017-8380)
  Li Qiang discovered that QEMU incorrectly handled the Virtio GPU device. An
 attacker inside the guest could use this issue to cause QEMU to consume
 resources and crash, resulting in a denial of service. This issue only
 affected Ubuntu 17.04. (CVE-2017-9060)
  Li Qiang discovered that QEMU incorrectly handled the e1000e device. A
 privileged attacker inside the guest could use this issue to cause QEMU to
 hang, resulting in a denial of service. This issue only affected Ubuntu
 17.04. (CVE-2017-9310)
  Li Qiang discovered that QEMU incorrectly handled USB OHCI emulation
 support. An attacker inside the guest could use this issue to cause QEMU to
 crash, resulting in a denial of service. (CVE-2017-9330)
  Li Qiang discovered that QEMU incorrectly handled IDE AHCI emulation
 support. A privileged attacker inside the guest could use this issue to
 cause QEMU to consume resources and crash, resulting in a denial of
 service. (CVE-2017-9373)
  Li Qiang discovered that QEMU incorrectly handled USB EHCI emulation
 support. A privileged attacker inside the guest could use this issue to
 cause QEMU to consume resources and crash, resulting in a denial of
 service. (CVE-2017-9374)
  Li Qiang discovered that QEMU incorrectly handled USB xHCI emulation
 support. A privileged attacker inside the guest could use this issue to
 cause QEMU to hang, resulting in a denial of service. (CVE-2017-9375)
  Zhangyanyu 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. (CVE-2017-9503)
  It was discovered that the QEMU qemu-nbd server incorrectly handled
 initialization. A remote attacker could use this issue to cause the server
 to crash, resulting in a denial of service. (CVE-2017-9524)
  It was discovered that the QEMU qemu-nbd server incorrectly handled
 signals. A remote attacker could use this issue to cause the server to
 crash, resulting in a denial of service. (CVE-2017-10664)
  Li Qiang discovered that the QEMU USB redirector incorrectly handled
 logging debug messages. An attacker inside the guest could use this issue
 to cause QEMU to crash, resulting in a denial of service. (CVE-2017-10806)
  Anthony Perard discovered that QEMU incorrectly handled Xen block-interface
 responses. An attacker inside the guest could use this issue to cause QEMU
 to leak contents of host memory. (CVE-2017-10911)
  Reno Robert discovered that QEMU incorrectly handled certain DHCP options
 strings. An attacker inside the guest could use this issue to cause QEMU
 to crash, resulting in a denial of service. (CVE-2017-11434)
  Ryan Salsamendi discovered that QEMU incorrectly handled empty CDROM device
 drives. A privileged attacker inside the guest could use this issue to
 cause QEMU to crash, resulting in a denial of service. This issue only
 affected Ubuntu 16.04 LTS and Ubuntu 17.04. (CVE-2017-12809)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
  qemu-system                     1:2.8+dfsg-3ubuntu2.5
  qemu-system-aarch64             1:2.8+dfsg-3ubuntu2.5
  qemu-system-arm                 1:2.8+dfsg-3ubuntu2.5
  qemu-system-mips                1:2.8+dfsg-3ubuntu2.5
  qemu-system-misc                1:2.8+dfsg-3ubuntu2.5
  qemu-system-ppc                 1:2.8+dfsg-3ubuntu2.5
  qemu-system-s390x               1:2.8+dfsg-3ubuntu2.5
  qemu-system-sparc               1:2.8+dfsg-3ubuntu2.5
  qemu-system-x86                 1:2.8+dfsg-3ubuntu2.5

Ubuntu 16.04 LTS:
  qemu-system                     1:2.5+dfsg-5ubuntu10.16
  qemu-system-aarch64             1:2.5+dfsg-5ubuntu10.16
  qemu-system-arm                 1:2.5+dfsg-5ubuntu10.16
  qemu-system-mips                1:2.5+dfsg-5ubuntu10.16
  qemu-system-misc                1:2.5+dfsg-5ubuntu10.16
  qemu-system-ppc                 1:2.5+dfsg-5ubuntu10.16
  qemu-system-s390x               1:2.5+dfsg-5ubuntu10.16
  qemu-system-sparc               1:2.5+dfsg-5ubuntu10.16
  qemu-system-x86                 1:2.5+dfsg-5ubuntu10.16

Ubuntu 14.04 LTS:
  qemu-system                     2.0.0+dfsg-2ubuntu1.36
  qemu-system-aarch64             2.0.0+dfsg-2ubuntu1.36
  qemu-system-arm                 2.0.0+dfsg-2ubuntu1.36
  qemu-system-mips                2.0.0+dfsg-2ubuntu1.36
  qemu-system-misc                2.0.0+dfsg-2ubuntu1.36
  qemu-system-ppc                 2.0.0+dfsg-2ubuntu1.36
  qemu-system-sparc               2.0.0+dfsg-2ubuntu1.36
  qemu-system-x86                 2.0.0+dfsg-2ubuntu1.36

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-3414-2
  https://www.ubuntu.com/usn/usn-3414-1
  https://launchpad.net/bugs/1718222

Package Information:
  https://launchpad.net/ubuntu/+source/qemu/1:2.8+dfsg-3ubuntu2.5
  https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu10.16
  https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.36



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