1. Ubuntu Security Notices
  2. USN-4511-1

USN-4511-1: QEMU vulnerability

Publication date

17 September 2020

Overview

QEMU could be made to crash or run programs.

Releases

Packages

  • qemu - Machine emulator and virtualizer

Details

Ziming Zhang, Xiao Wei, Gonglei Arei, and Yanyu Zhang discovered that QEMU
incorrectly handled certain USB packets. An attacker inside the guest could
use this issue to cause QEMU to crash, resulting in a denial of service, or
possibly execute arbitrary code on the host. In the default installation,
when QEMU is used with libvirt, attackers would be isolated by the libvirt
AppArmor profile.

Ziming Zhang, Xiao Wei, Gonglei Arei, and Yanyu Zhang discovered that QEMU
incorrectly handled certain USB packets. An attacker inside the guest could
use this issue to cause QEMU to crash, resulting in a denial of service, or
possibly execute arbitrary code on the host. In the default installation,
when QEMU is used with libvirt, attackers would be isolated by the libvirt
AppArmor profile.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
20.04 focal qemu –  1:4.2-3ubuntu6.6
qemu-system –  1:4.2-3ubuntu6.6
qemu-system-arm –  1:4.2-3ubuntu6.6
qemu-system-mips –  1:4.2-3ubuntu6.6
qemu-system-ppc –  1:4.2-3ubuntu6.6
qemu-system-s390x –  1:4.2-3ubuntu6.6
qemu-system-sparc –  1:4.2-3ubuntu6.6
qemu-system-x86 –  1:4.2-3ubuntu6.6
qemu-system-x86-microvm –  1:4.2-3ubuntu6.6
qemu-system-x86-xen –  1:4.2-3ubuntu6.6
18.04 bionic qemu –  1:2.11+dfsg-1ubuntu7.32
qemu-system –  1:2.11+dfsg-1ubuntu7.32
qemu-system-arm –  1:2.11+dfsg-1ubuntu7.32
qemu-system-mips –  1:2.11+dfsg-1ubuntu7.32
qemu-system-ppc –  1:2.11+dfsg-1ubuntu7.32
qemu-system-s390x –  1:2.11+dfsg-1ubuntu7.32
qemu-system-sparc –  1:2.11+dfsg-1ubuntu7.32
qemu-system-x86 –  1:2.11+dfsg-1ubuntu7.32
16.04 xenial qemu –  1:2.5+dfsg-5ubuntu10.46
qemu-block-extra –  1:2.5+dfsg-5ubuntu10.46
qemu-guest-agent –  1:2.5+dfsg-5ubuntu10.46
qemu-kvm –  1:2.5+dfsg-5ubuntu10.46
qemu-system –  1:2.5+dfsg-5ubuntu10.46
qemu-system-aarch64 –  1:2.5+dfsg-5ubuntu10.46
qemu-system-arm –  1:2.5+dfsg-5ubuntu10.46
qemu-system-common –  1:2.5+dfsg-5ubuntu10.46
qemu-system-mips –  1:2.5+dfsg-5ubuntu10.46
qemu-system-misc –  1:2.5+dfsg-5ubuntu10.46
qemu-system-ppc –  1:2.5+dfsg-5ubuntu10.46
qemu-system-s390x –  1:2.5+dfsg-5ubuntu10.46
qemu-system-sparc –  1:2.5+dfsg-5ubuntu10.46
qemu-system-x86 –  1:2.5+dfsg-5ubuntu10.46
qemu-user –  1:2.5+dfsg-5ubuntu10.46
qemu-user-binfmt –  1:2.5+dfsg-5ubuntu10.46
qemu-user-static –  1:2.5+dfsg-5ubuntu10.46
qemu-utils –  1:2.5+dfsg-5ubuntu10.46

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References

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