USN-3414-1: QEMU vulnerabilities

13 September 2017

qemu vulnerabilities

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

  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in QEMU.

Software Description

  • qemu - Machine emulator and virtualizer

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-3ubuntu2.4
qemu-system-aarch64 - 1:2.8+dfsg-3ubuntu2.4
qemu-system-arm - 1:2.8+dfsg-3ubuntu2.4
qemu-system-mips - 1:2.8+dfsg-3ubuntu2.4
qemu-system-misc - 1:2.8+dfsg-3ubuntu2.4
qemu-system-ppc - 1:2.8+dfsg-3ubuntu2.4
qemu-system-s390x - 1:2.8+dfsg-3ubuntu2.4
qemu-system-sparc - 1:2.8+dfsg-3ubuntu2.4
qemu-system-x86 - 1:2.8+dfsg-3ubuntu2.4
Ubuntu 16.04 LTS
qemu-system - 1:2.5+dfsg-5ubuntu10.15
qemu-system-aarch64 - 1:2.5+dfsg-5ubuntu10.15
qemu-system-arm - 1:2.5+dfsg-5ubuntu10.15
qemu-system-mips - 1:2.5+dfsg-5ubuntu10.15
qemu-system-misc - 1:2.5+dfsg-5ubuntu10.15
qemu-system-ppc - 1:2.5+dfsg-5ubuntu10.15
qemu-system-s390x - 1:2.5+dfsg-5ubuntu10.15
qemu-system-sparc - 1:2.5+dfsg-5ubuntu10.15
qemu-system-x86 - 1:2.5+dfsg-5ubuntu10.15
Ubuntu 14.04 LTS
qemu-system - 2.0.0+dfsg-2ubuntu1.35
qemu-system-aarch64 - 2.0.0+dfsg-2ubuntu1.35
qemu-system-arm - 2.0.0+dfsg-2ubuntu1.35
qemu-system-mips - 2.0.0+dfsg-2ubuntu1.35
qemu-system-misc - 2.0.0+dfsg-2ubuntu1.35
qemu-system-ppc - 2.0.0+dfsg-2ubuntu1.35
qemu-system-sparc - 2.0.0+dfsg-2ubuntu1.35
qemu-system-x86 - 2.0.0+dfsg-2ubuntu1.35

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References